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26.267 | eCall data transfer; In-band modem solution; General description | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.267/26267-i00.zip | The present document specifies the eCall In-band Modem, which is used for reliable transmission of the eCall Minimum Set of Data (MSD) from an In-Vehicle System (IVS) to the Public Safety Answering Point (PSAP) via the voice channel of cellular and PSTN networks.
The European Union eCall requirements, recommendations and guidelines were developed by eSafety Forum [10] and [11], with important additional work produced by ETSI MSG, GSME, 3GPP, and CEN.
Previous work in 3GPP TR 22.967 [3] "Transfer of Emergency Call Data", examined the issues associated with the transmission of emergency call data from a vehicle to a PSAP. This analysis identified that the preferred option be based on an in-band modem solution.
eCall provides reliable full-duplex data communications between IVS and PSAP in addition to emergency voice call (E112) via the cellular network, and can be initiated either automatically or manually [1]. The eCall In-band Modem uses the same voice channel as used for the emergency voice call. eCall allows reliable transmission of MSD alternating with a speech conversation through the existing voice communication paths in cellular mobile phone systems. The expected benefit is that emergency services will be made aware of accidents much more rapidly, will get precise information on location, vehicle type etc. and therefore will be able to reach accident victims faster, with the potential to save many lives annually.
The eCall in-band modem solution described here exceeds the eCall requirements (see Annex A) by means of a combination of innovations in data modulation scheme, synchronization, forward error correction coding, hybrid ARQ (HARQ) and incremental redundancy transmission.
The present document provides a general overview and algorithm description of the eCall in-band modems, including IVS modem and PSAP modem, to form the complete full-duplex transmission.
The eCall in-band modems (IVS and PSAP) are fully specified by this TS together with the C-code reference as provided in 3GPP TS 26.268 [2].
3GPP TS 26.269 [13] deals with the conformance testing for eCall modem implementations, and 3GPP TR 26.969 [14] contains a characterization report of the in-band modem. |
26.268 | eCall data transfer; In-band modem solution; ANSI-C reference code | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.268/26268-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the eCall in-band modem solution for reliable transmission of MSD data from IVS to PSAP via the speech channel of cellular networks. The ANSI‑C code is necessary for a bit exact implementation of the IVS modem and PSAP modem described in 3GPP TS 26.267 [1]. |
26.269 | eCall data transfer; In-band modem solution; Conformance testing | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.269/26269-i00.zip | This Technical Specification (TS) specifies minimum performance requirements, test procedures and digital test sequences to be used for conformance testing of implementations of the eCall in-band modem.
The eCall in-band modem PSAP and IVS transmitters and receivers are specified in TS 26.267 [1]. The reference fixed point ANSI-C implementation for the specified eCall modem is provided in TS 26.268 [2].
The eCall in-band modem is a technology that transmits data reliably over the speech channel of the cellular and PSTN networks. It is specifically designed for transmission of the Minimum Set of Data (MSD) from IVS to PSAP for the Pan-European eCall initiative. For the purpose of the present specification, conformance is determined for the transmission of one single MSD of length 140 bytes. Other applications of the eCall in-band modem are out of scope of this document. |
26.273 | ANSI-C code for the fixed-point Extended Adaptive Multi-Rate - Wideband (AMR-WB+) speech codec | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.273/26273-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the Fixed-point Extended Adaptive Multi‑Rate Wideband codec. Alternatively, floating-point ANSI-C code is specified in 3GPP TS 26.304 [1]. The fixed-point codec/encoder/decoder specified in the present document or the floating-point codec/encoder/decoder specified in 3GPP TS 26.304 [1] may be used depending on if the implementation platform is better suited for a floating-point or a fixed-point implementation. It has been verified that the fixed-point and floating-point codecs interoperate with each other without any artifacts.
The fixed-point ANSI‑C code in the present document defines, besides the floating-point c-code specified in 3GPP TS 26.304 [1], one valid reference implementation of the Extended Adaptive Multi-Rate Wideband transcoder (3GPP TS 26.290 [2]). Standard conformance it is enforced by meeting the conformance criteria defined in 3GPP TS 26.274 [3]. |
26.274 | Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) speech codec; Conformance testing | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.274/26274-i00.zip | The present document specifies test procedures and digital test sequences to be used for conformance testing of implementations of the Extended Adaptive Multi‑Rate Wideband (AMR‑WB+) codec. |
26.281 | Mission Critical Video (MCVideo); Codecs and media handling | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.281/26281-i00.zip | The present document specifies the codecs and media handling for MCVideo. The requirements for MCVideo are specified by SA1 in two technical specifications:
a. The requirements specific to Mission Critical Video have been specified in 3GPP TS 22.281 [3].
b. The requirements common to multiple mission critical services have been specified in 3GPP TS 22.280 [2].
The architectural work for MCVideo is specified by SA6 in two technical specifications:
a. architectural and feature work specific to MCVideo have been specified in 3GPP TS 23.281 [5].
b. architectural aspects common to multiple mission critical services have been specified in 3GPP TS 23.280 [4]. |
26.290 | Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Transcoding functions | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.290/26290-i00.zip | This Telecommunication Standard (TS) describes the detailed mapping from input blocks of monophonic or stereophonic audio samples in 16 bit uniform PCM format to encoded blocks and from encoded blocks to output blocks of reconstructed monophonic or stereophonic audio samples. The coding scheme is an extension of the AMR-WB coding scheme [3] and is referred to as extended AMR-WB or AMR-WB+ codec. It comprises all AMR-WB speech codec modes including VAD/DTX/CNG [2][8][10] as well as extended functionality for encoding general audio signals such as music, speech, mixed, and other signals.
In the case of discrepancy between the requirements described in the present document and the ANSI-C code computational description of these requirements contained in [4], [5], the description in [4], [5], respectively, will prevail. The ANSI-C code is not described in the present document, see [4], [5] for a description of the floating-point or, respectively, fixed-point ANSI-C code. |
26.304 | Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Floating-point ANSI-C code | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.304/26304-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the Floating-point Extended Adaptive Multi-Rate Wideband codec. Alternatively, fixed-point ANSI-C code is specified in 3GPP TS 26.273 [1]. The floating-point codec/encoder/decoder specified in this document or the fixed-point codec/encoder/decoder specified in [1] may be used depending on if the implementation platform is better suited for a floating-point or a fixed-point implementation. It has been verified that the fixed-point and floating-point codecs interoperate with each other without any artifacts.
The floating-point ANSI‑C code in the present document defines, besides the fixed-point c-code specified in [1], one valid reference implementation of the Extended Adaptive Multi-Rate Wideband transcoder (3GPP TS 26.290 [2]). Standard conformance is enforced by meeting the conformance criteria defined in [3]. |
26.307 | Presentation layer for 3GPP services | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.307/26307-i00.zip | The present document specifies an HTML5 profile as a common presentation layer for 3GPP services. |
26.346 | Multimedia Broadcast/Multicast Service (MBMS); Protocols and codecs | TS | 18.2.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.346/26346-i20.zip | |
26.347 | Multimedia Broadcast/Multicast Service (MBMS); Application Programming Interface and URL | TS | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.347/26347-i10.zip | The present document provides application methods and interfaces between an MBMS-aware application and the UE MBMS Client to access 3GPP MBMS User services. The purpose of the document is the definition of enablers in order to simplify the usage of MBMS in web-centric as well as app-based service environments.
The present document defines several APIs to access MBMS User Services and URLs to access resources available as part of an MBMS User Service. The MBMS User Services are defined in TS 26.346 [5] and are not part of the present document. |
26.348 | Northbound Application Programming Interface (API) for Multimedia Broadcast/Multicast Service (MBMS) at the xMB reference point | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.348/26348-i00.zip | The present document provides interaction methods and interfaces between a BM-SC and a content provider. The purpose of the document is the definition of enablers for the usage of MBMS delivery. |
26.401 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; General description | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.401/26401-i00.zip | This Telecommunication Standard (TS) describes the detailed mapping from an MPEG-4 bitstream containing Enhanced aacPlus coded audio to PCM sample output. The Enhanced aacPlus audio codec is based on the AAC, SBR and Parametric Stereo coding tools defined in the MPEG-4 Audio standard [5][6][7]. In addition it includes further tools such as error concealment, spline resampler, and stereo-to-mono downmix.
This Telecommunication Standard (TS) also describes the detailed mapping from a PCM sample input to an MPEG-4 bitstream containing Enhanced aacPlus coded audio. |
26.402 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Additional decoder tools | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.402/26402-i00.zip | This Telecommunication Standard (TS) describes the error concealment algorithm, SBR parameter downmix and output resampling for the Enhanced aacPlus general audio codec [3]. |
26.403 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Encoder specification; Advanced Audio Coding (AAC) part | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.403/26403-i00.zip | This Telecommunication Standard (TS) describes the AAC encoder part of the Enhanced aacPlus general audio codec [1]. |
26.404 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Enhanced aacPlus encoder Spectral Band Replication (SBR) part | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.404/26404-i00.zip | This Telecommunication Standard (TS) describes the SBR encoder part of the Enhanced aacPlus general audio codec [3]. |
26.405 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Encoder specification parametric stereo part | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.405/26405-i00.zip | This Telecommunication Standard (TS) describes the Parametric Stereo encoder part of the Enhanced aacPlus general audio codec [4]. |
26.406 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Conformance testing | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.406/26406-i00.zip | The present document specifies the digital test sequences and conformance criteria for the Enhanced aacPlus audio codec. |
26.410 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Floating-point ANSI-C code | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.410/26410-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the Floating-point Enhanced aacPlus codec [1]. |
26.411 | General audio codec audio processing functions; Enhanced aacPlus general audio codec; Fixed-point ANSI-C code | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.411/26411-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the Fixed-point Enhanced aacPlus codec [1]. |
26.412 | Source code for 3GP file format | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.412/26412-i00.zip | The present document serves as a "cover note" for the source code of the 3GPP file format. |
26.430 | Timed graphics | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.430/26430-i00.zip | The present document defines a timed graphics media type which reuses components from existing media types. A transport system is defined as is a storage format.
The specification is written in a forward-compatible way in order to allow additions of media components and functionality in future releases.
It enhances the user experience by enabling graphics to be encoded as graphics (as opposed to video) and without requiring an umbrella system such as SMIL or DIMS. |
26.441 | Codec for Enhanced Voice Services (EVS); General overview | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.441/26441-i00.zip | The present document is an introduction to the audio processing parts of the Enhanced Voice Services coder. A general overview of the audio processing functions is given, with reference to the documents where each function is specified in detail. |
26.442 | Codec for Enhanced Voice Services (EVS); ANSI C code (fixed-point) | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.442/26442-i00.zip | The present document contains an electronic copy of the ANSI‑C code for the Enhanced Voice Services (EVS) Codec. The ANSI‑C code is necessary for a bit exact implementation of the EVS Codec (3GPP TS 26.445), Voice Activity Detection (VAD) (3GPP TS 26.451), Comfort Noise Generation (CNG) (3GPP TS 26.449), Discontinuous Transmission (DTX) (3GPP TS 26.450), Packet Loss Concealment (PLC) of Lost Packets (3GPP TS 26.447), Jitter Buffer Management (JBM) (3GPP TS 26.448), and AMR-WB Interoperable Function (3GPP TS 26.446).
Requirements for any implementation of the EVS codec to be standard compliant are specified in 3GPP TS 26.444 (Test sequences). |
26.443 | Codec for Enhanced Voice Services (EVS); ANSI C code (floating-point) | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.443/26443-i00.zip | The present document contains an electronic copy of the ANSI C floating-point code for the Enhanced Voice Services (EVS) Codec. This ANSI C code is the unique alternative reference specification besides the ANSI-C fixed-point code for the EVS Codec (3GPP TS 26.442) for a standard compliant implementation of the EVS Codec (3GPP TS 26.445), Voice Activity Detection (VAD) (3GPP TS 26.451), Comfort Noise Generation (CNG) (3GPP TS 26.449), Discontinuous Transmission (DTX) (3GPP TS 26.450), Packet Loss Concealment (PLC) of Lost Packets (3GPP TS 26.447), Jitter Buffer Management (JBM) (3GPP TS 26.448), and AMR-WB Interoperable Function (3GPP TS 26.446).
The bit-exact fixed-point ANSI-C code in 3GPP TS 26.442 or alternatively in 3GPP TS 26.452 remain the preferred implementation for all applications, but the floating-point codec may be used instead of the fixed-point codec when the implementation platform is better suited for a floating-point implementation.
Requirements for any implementation of the EVS codec to be standard compliant are specified in 3GPP TS 26.444 (Test sequences). |
26.444 | Codec for Enhanced Voice Services (EVS); Test sequences | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.444/26444-i00.zip | The present document specifies the digital test sequences for the Enhanced Voice Services (EVS) Codec. These sequences are used in conformance testing for implementations of the EVS Codec (3GPP TS 26.445), Voice Activity Detection (VAD) (3GPP TS.26.451), Comfort Noise Generation (3GPP TS 26.449), Discontinuous Transmission (DTX) (3GPP TS 26.450), Error Concealment of Lost Packets (3GPP TS 26.447), Jitter Buffer Management (JBM) (3GPP TS 26.448), and AMR-WB Interoperable Function (3GPP TS 26.446). In addition, the present document specifies procedures for conformance testing. |
26.445 | Codec for Enhanced Voice Services (EVS); Detailed algorithmic description | TS | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.445/26445-i10.zip | The present document is a detailed description of the signal processing algorithms of the Enhanced Voice Services coder. |
26.446 | Codec for Enhanced Voice Services (EVS); Adaptive Multi-Rate - Wideband (AMR-WB) backward compatible functions | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.446/26446-i00.zip | The present document specifies the AMR-WB backward compatible functions of the EVS codec.
The present document is a high level overview of the functionality with reference to the Codec Detailed Algorithmic Description where the functionality is specified in detail. |
26.447 | Codec for Enhanced Voice Services (EVS); Error concealment of lost packets | TS | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.447/26447-i10.zip | The present document defines a frame loss concealment procedure, also termed frame substitution and muting procedure, which is executed by the Enhanced Voice Services (EVS) decoder when one or more frames (speech or audio or SID frames) are unavailable for decoding due to e.g. packet loss, corruption of a packet or late arrival of a packet. |
26.448 | Codec for Enhanced Voice Services (EVS); Jitter Buffer Management | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.448/26448-i00.zip | The present document defines the Jitter Buffer Management solution for the Codec for Enhanced Voice Services (EVS). |
26.449 | Codec for Enhanced Voice Services (EVS); Comfort Noise Generation (CNG) aspects | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.449/26449-i00.zip | The present document gives an overview for the requirements of the background acoustic noise evaluation, noise parameter encoding/decoding and comfort noise generation for the Enhanced Voice Services (EVS) speech codec during Discontinuous Transmission (DTX) operation. |
26.450 | Codec for Enhanced Voice Services (EVS); Discontinuous Transmission (DTX) | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.450/26450-i00.zip | This document specifies the system level aspects of the Discontinuous Transmission (DTX) function of the EVS codec. |
26.451 | Codec for Enhanced Voice Services (EVS); Voice Activity Detection (VAD) | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.451/26451-i00.zip | The present document specifies the Voice Activity Detector (VAD) used in the Discontinuous Transmission (DTX) of the EVS Codec. Although the main application of the VAD algorithm is the detection of speech or voice signals, the algorithm is more accurately described as a Signal Activity Detection (SAD) algorithm.
The present document is a high level overview of the functionality with reference to the Codec Detailed Algorithmic Description where the functionality is specified in detail. |
26.452 | Codec for Enhanced Voice Services (EVS); ANSI C code; Alternative fixed-point using updated basic operators | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.452/26452-i00.zip | The present document contains an electronic copy of the ANSI‑C code for alternative fixed-point implementation of the Enhanced Voice Services (EVS) Codec using updated basic operators [13]. The ANSI‑C code is necessary for a bit exact implementation of the EVS Codec (3GPP TS 26.445), Voice Activity Detection (VAD) (3GPP TS 26.451), Comfort Noise Generation (CNG) (3GPP TS 26.449), Discontinuous Transmission (DTX) (3GPP TS 26.450), Packet Loss Concealment (PLC) of Lost Packets (3GPP TS 26.447), Jitter Buffer Management (JBM) (3GPP TS 26.448), and AMR-WB Interoperable Function (3GPP TS 26.446).
Requirements for any implementation of the EVS codec to be standard compliant are specified in 3GPP TS 26.444 (Test sequences). |
26.453 | Codec for Enhanced Voice Services (EVS); Speech codec frame structure | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.453/26453-i00.zip | The Enhanced Voice Services (EVS) Codec is specified in the series of Technical Specifications TS 26.441 [3], TS 26.442 [4], TS 26.443 [5], TS 26.444 [6], TS 26.445 [7], TS 26.446 [8], TS 26.447 [9], TS 26.448 [10], TS 26.449 [11], TS 26.450 [12], TS 26.451 [13] and TS 26.452 [15]. The EVS Codec is characterized in TR 26.952 [14].
The present document describes the "generic frame format" for the EVS Codec for the application in 3G Circuit-Switched Networks. This format is based on the RTP framing, as specified in TS 26.445 [7]. This generic frame format will be used as a common reference point, when interfacing speech frames between different elements of the 3G system. Appropriate mappings to and from this generic frame format will be used within and between each system element. |
26.454 | Codec for Enhanced Voice Services (EVS); Interface to Iu, Uu, Nb and Mb | TS | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.454/26454-i00.zip | The Enhanced Voice Services (EVS) Codec is specified in Technical Specifications TS 26.441 [11], TS 26.442 [22], TS 26.443 [23], TS 26.444 [24], TS 26.445 [12], TS 26.446 [13], TS 26.447 [14], TS 26.448 [15], TS 26.449 [16], TS 26.450 [17], TS 26.451 [18] and TS 26.452 [25]. The generic frame format for 3G CS networks is specified in TS 26.453 [19]. The allowed EVS Configurations of the UMTS_EVS Codec Type are specified in TS 26.103 [20].
The present document specifies the mapping of the EVS generic frame format (3GPP TS 26.453 [19]) to the Iu Interface (3GPP TS 25.415 [4]) and the Uu Interface, including handling of the EVS-CMR by the UE and the Iu-terminating MGW.
The present document specifies also the mapping to the Nb Interface in a BICC-based circuit switched core network. (3GPP TS 29.415 [7]) and the Nb-Interface in a SIP-I-based circuit switched core network (3GPP TS 23.231 [3]).
The present document specifies also the interworking of different EVS Configurations on the terminations of the MGW and the interworking between EVS and AMR-WB on the terminations of the MGW. |
26.501 | 5G Media Streaming (5GMS); General description and architecture | TS | 18.8.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.501/26501-i80.zip | |
26.502 | 5G multicast-broadcast services; User service architecture | TS | 18.3.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.502/26502-i30.zip | |
26.506 | 5G Real-time Media Communication Architecture (Stage 2) | TS | 18.5.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.506/26506-i50.zip | |
26.510 | Media delivery; interactions and APIs for provisioning and media session handling | TS | 18.4.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.510/26510-i40.zip | The present document specifies:
1. The operations and corresponding APIs used by a Media Application Provider to interact with a Media AF component to provision the delivery of media in a Media Delivery System.
2. The operations and corresponding APIs used by a Media Session Handler component to interact with a provisioned Media AF for the purpose of managing media delivery sessions ("media session handling").
3. The operations and corresponding APIs used by a Media-aware Application running in a UE or by a Media Access Client component to interact with a Media Session Handler for the purpose of initiating a media delivery session and for controlling it.
The Media Delivery System may be:
- a 5G Media Streaming (5GMS) System, as specified in TS 26.512 [6]; and/or
- a Real-Time media Communication (RTC) System, as specified in TS 26.113 [7]. |
26.511 | 5G Media Streaming (5GMS); Profiles, codecs and formats | TS | 18.2.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.511/26511-i20.zip | The present document specifies the profiles, codecs and formats for 5G Media Streaming (5GMS) services based on the 5G Media Streaming Architecture (5GMSA) including both unicast downlink and unicast uplink. The codec and format recommendations defined for each profile apply to the 5GMSd Client components in the User Equipment (UE) as well as the Media Application Server (AS). Profiles are defined to address specific service scenarios. A default profile is defined in the case no other profile is claimed to be supported. 5G Media Streaming protocols and formats are defined based on the Common Media Application Format (CMAF). |
26.512 | 5G Media Streaming (5GMS); Protocols | TS | 18.6.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.512/26512-i60.zip | The present document specifies the set of protocols and APIs for 5G Media Streaming (5GMS) services based on the 5G Media Streaming Architecture (5GMSA). 5GMS supports services including MNO and third-party Downlink Media Streaming Services, and MNO and third-party Uplink Media Streaming Services. |
26.517 | 5G Multicast-Broadcast User Services; Protocols and Formats | TS | 18.4.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.517/26517-i40.zip | The present document defines protocols and formats for User Services as defined in TS 26.502 [6] and conveyed using the 5G multicast–broadcast capabilities of the 5G System defined in TS 23.501 [2], TS 23.502 [3] and TS 23.247 [5]. |
26.522 | 5G Real-time Media Transport Protocol Configurations | TS | 18.2.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.522/26522-i20.zip | |
26.531 | Data Collection and Reporting; General Description and Architecture | TS | 18.2.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.531/26531-i20.zip | The present document defines a generic architecture for collecting and reporting data in the 5G System as defined in TS 23.501 [2], TS 23.502 [3] , TS 23.288 [4] and TS 29.517 [5]. |
26.532 | Data Collection and Reporting; Protocols and Formats | TS | 18.5.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.532/26532-i50.zip | The present document specifies the set of APIs and associated resource structures and data models pertaining to the collection and reporting of UE-related data (synonymously “UE data”) by the Data Collection Application Function (AF) in the 5G System for subsequent event exposure services offered to network consumer entities, as defined in 3GPP TS 23.501 [2], TS 23.502 [3], TS 23.288 [4], TS 29.517 [5], TS 29.510 [6] and TS 26.531 [7] . |
26.565 | Split Rendering Media Service Enabler | TS | 18.3.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.565/26565-i30.zip | |
26.801 | User Equipment (UE) supporting handset mode with non-traditional earpieces | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.801/26801-i00.zip | The present document reports on investigations of testing UEs featuring non-traditional earpieces, and identifies related gaps to existing 3GPP specifications and recommended test equipment. |
26.804 | Study on 5G media streaming extensions | TR | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.804/26804-i10.zip | |
26.806 | Study on Tethering AR Glasses – Architectures, QoS and Media Aspects | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.806/26806-i00.zip | The present document addresses architectures, QoS and media handling aspects of when tethering AR Glasses to 5G UEs based on initial discussions in TR 26.998 [2]. In particular, the following aspects are in scope:
- Definition of different tethering architectures for AR Glasses including 5G sidelink and non-5G access based on existing 5G System functionalities
- Documentation of the relationship between AR Glasses tethering and AR glasses considered as PIN (Personal IoT Network) elements according to TR 22.859 [3] and the derived service requirements in TS 22.261 [4].
- Documentation of end-to-end call flows for session setup and handling
- Identification media handling aspects of different tethering architectures
- Identification of end-to-end QoS-handling for different tethering architectures and define supporting mechanisms to compensate for the non-5G link between the UE and the AR glasses
- Providing recommendations for suitable architectures to meet typical AR requirements such as low power consumption, low latency, high bitrates, security and reliability.
- Collaboration with relevant other 3GPP groups on this matter
- Identification of potential follow-up work on this matter |
26.812 | QoE metrics for AR/MR services | TR | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.812/26812-i10.zip | This document addresses information collection and QoE metrics definition aspects when the XR (e.g. AR/MR) devices are based on the architecture defined in MeCAR WI. The following details are in scope:
- Collect relevant external information on QoE Metrics for AR and XR services, for example taking into account information in ITU-T, MPEG or other groups dealing with quality measurements, include device related QoE metrics, network transmission related QoE metrics, content handling related QoE metrics, and other immersiveness/presence related QoE metrics.
- Documentation of subjective tests results on XR QoE metrics, if considered relevant.
- Identification of relevant XR QoE Metrics and their impacts on the user experience.
- Identification of relevant observation points and define the measurement and derivation of relevant XR QoE metrics in the device architecture based on MeCAR WI.
- Collaboration with relevant groups or specifications on NWDAF, RRC-based metrics configuration and collection.
- Provide recommendation on normative work for new XR QoE metrics based on the findings in this study. |
26.813 | Avatar Representation and Communication | TR | 0.8.1 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.813/26813-081.zip | |
26.847 | Evaluation of Artificial Intelligence and Machine learning in 5G media services | TR | 0.5.1 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.847/26847-051.zip | |
26.857 | 5G Media Service Enablers | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.857/26857-i00.zip | The present document introduces and defines the concept of Media Service Enablers which includes among others:
- Definition of the principal properties of Media Service Enablers.
- Definition of minimum and typical functionalities of Media Service Enablers.
- Definition of a specification template for Media Service Enablers.
- Identification of possibly relevant stage-2 and stage-3 work for Media Service Enablers.
- Collection of a set of initially relevant Media Service Enablers for normative work. |
26.865 | Immersive Audio for Split Rendering Scenarios; Requirements | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.865/26865-i00.zip | The present document identifies relevant guidelines and IVAS [2] related requirements associated with split rendering scenarios for immersive audio. It covers:
- Design guidelines/constraints related to complexity and memory as well as constraints related to relevant interfaces between presentation engine and End Device such as bit rate, latency, down- and upstream traffic characteristics.
- Design guidelines/constraints related to functional capability requirements such as rendering of non-diegetic sounds, 3DoF rendering of diegetic immersive sounds.
- Performance guidelines/requirements. |
26.902 | Video codec performance | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.902/26902-i00.zip | The present document comprises a technical report on Video Codec Performance, for packet-switched video-capable multimedia services standardized by 3GPP. |
26.903 | Improved video support for Packet Switched Streaming (PSS) and Multimedia Broadcast/Multicast Service (MBMS) Services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.903/26903-i00.zip | The present document provides an analysis of the future video capability requirements of streaming and multicast/broadcast services. The purpose of this document is two-fold. On the one hand, it studies the options to upgrade the minimal requirements for video reception and decoding. On the other hand, it studies use cases for support of more advanced UEs. The ultimate target of this study item is to recommend solutions for efficiently providing video support commensurate with UE and user capabilities and needs in PSS and MBMS services. |
26.904 | Improved video coding support | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.904/26904-i00.zip | The present document provides an analysis of the future video capability requirements of streaming and multicast/broadcast services. The purpose of the present document is two-fold. On the one hand, it studies the options to upgrade the minimal requirements for video reception and decoding. On the other hand, it studies use cases for support of more advanced UEs. The ultimate target of this study item is to recommend solutions for efficiently providing video support commensurate with UE and user capabilities and needs in PSS and MBMS services. |
26.905 | Mobile stereoscopic 3D video | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.905/26905-i00.zip | The present document provides a study of stereoscopic 3D video services over 3GPP networks and terminals. Technical definitions, use case descriptions, working assumptions, subjective tests results and technical studies are presented.
This document identifies the gaps within the Release 10 3GPP specifications in order to enable the implementation of the mobile 3D video use cases. |
26.906 | Evaluation of High Efficiency Video Coding (HEVC) for 3GPP services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.906/26906-i00.zip | The present document reports the evaluation of the High Efficiency Video Coding (HEVC) codec in 3GPP services. It provides an overview of the codec and a comparison to H.264 (AVC) codec. The support of H.264 (AVC) is mandated for 3GP-DASH (TS 26.247[ 18]), PSS (TS 26.234 [19]), MBMS (TS 26.346 [20]), 3GPP file format (TS 26.244 [21]), MTSI (TS 26.114 [22]) and MMS (TS 26.140 [23]) in Release 11. The present document reports on the performance of H.265 (HEVC) when used in 3GPP services for video coding in comparison to H.264 (AVC) and the performance of H.265 (HEVC) when used in 3GPP services for image coding in comparison to JPEG. Performance is evaluated in typical 3GPP service environments taking into account bandwidth and coding efficiency, user experience and complexity. Based on the performance results, recommendations are provided for the proper inclusion of H.265 (HEVC) in 3GPP services. |
26.907 | HTML5 for a new presentation layer in 3GPP services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.907/26907-i00.zip | The present document is a study of existing scene description solutions for 3GPP services and an evaluation of HTML5 as an alternative and unified solution for providing a presentation layer for 3GPP services. |
26.909 | Study on improved streaming Quality of Experience (QoE) reporting in 3GPP services and networks | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.909/26909-i00.zip | The present document describes the enhancement of Quality of Experience (QoE) for operator managed streaming service, 3rd party managed streaming service and Over-The-Top (OTT) streaming service. |
26.910 | Study on media handling aspects of Radio Access Network (RAN) delay budget reporting in Multimedia Telephony Service for Internet Protocol (IP) Multimedia Subsystem (IMS) (MTSI) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.910/26910-i00.zip | The present document investigates several MTSI enhancements relevant to the media handling aspects of RAN delay budget reporting. More specifically, the following MTSI enhancements are addressed, and the related gap analysis and conclusions are documented:
1) Potential recommendations for MTSI on the available mechanisms in TS 26.114 to determine the content of UEAssistanceInformation messages with delay budget report information including:
- Relevant end-to-end quality metrics (e.g., round-trip time (RTT), packet loss ratio (PLR), jitter, etc.) in MTSI and other relevant information that can be used to trigger UEAssistanceInformation messages.
- Suitable conditions on the end-to-end delay and jitter to determine:
- if UE should send UEAssistanceInformation with delay budget report information, e.g., suitable RTT thresholds (i.e., with RTT determined by using RTCP sender and receiver reports),
- what kind of information may be included in the UEAssistanceInformation messages based on the available information at the MTSI client.
2) Potential recommendations on how RAN-level delay budget reporting works in conjunction with existing media adaptation behaviours in TS 26.114 for MTSI. Relevant media adaptation behaviours include:
- Codec rate or mode adaptation via CMR / RTCP-APP messages (for voice).
- Use of application layer redundancy for increased reliability.
- Use of packet bundling (a.k.a. frame aggregation).
In particular, potential recommendations are studied on when and how the UEs should use RAN-based delay adjustment mechanisms in an end-to-end fashion also accounting for local radio conditions and when UEs may activate and perform media-layer adaptation. The recommendations provided are flexible enough to enable implementations to optimize how relevant metrics and information, including non-standardized information, are used by the UE.
3) Identification and definition of potential new formats for real-time signalling of delay budget information from an MTSI receiver to an MTSI sender during a multimedia telephony session are also considered.
Furthermore, end-to-end performance evaluations for MTSI are presented, based on end-to-end metrics such as delay, jitter and packet loss rate, in conjunction with RAN-level air interface delay considerations toward developing potential recommendations on MTSI for the areas above. |
26.911 | Codec(s) for Circuit-Switched (CS) multimedia telephony service; Terminal implementor’s guide | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.911/26911-i00.zip | The present document provides non-mandatory recommendations for the use of the different codec implementation options for the circuit switched multimedia telephony service which is based on ITU-T Recommendation H.324 [7], and Annex C of ITU-T Recommendation H.324 [7] in particular. These recommendations address issues specific to the 3G operating environment, including guaranteeing sufficient error resilience and interworking between terminals.
The contents of the present document are provided for information to assist in high quality implementation of multimedia telephony terminals. All references to "terminals" in this report are to terminals supporting the Circuit Switched Multimedia Telephony Service as described in [7-9]. |
26.914 | Multimedia telephony over IP Multimedia Subsystem (IMS); Optimization opportunities | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.914/26914-i00.zip | The present document:
- identifies opportunities for optimization of service quality and efficiency of Multimedia telephony over IP in a qualitative sense;
- provides the basis for developing a set of optional backward-compatible tools implementing such optimizations.
The optimized multimedia telephony targets many different system configurations and operating conditions, e.g. GERAN, UTRAN, inter-working between GERAN, UTRAN, GAN, and different PLMNs. Of the various use cases for multimedia telephony, the main focus of the present document is on voice calls, but the focus also includes other core media components, such as video. In particular, areas with optimization opportunities include handling of degraded channels, delay jitter, packet losses, efficiency, inter-working with other voice systems, etc.
The scope includes proposing solutions that maintain backward compatibility in order to ensure seamless inter-working with existing services available in the CS domain, such as CS voice telephony and 3G-324M, as well as with terminals of earlier 3GPP releases. Alignment with legacy media formats avoids transcoding and even allows realizing at least parts of the optimization gains. All optimizations are hence based on the default codecs specified in 3GPP TS 26.235 [3] and 3GPP TS 26.141 [6].
The optimizations identified in the present document address mainly. media transport and signalling. Most of the SIP signalling is out of scope and is handled by other 3GPP groups. Issues regarding registration to the network and/or to IMS at power-on or at other occurrences are not included either.
The optimization tools are not specified in the present document per se, but will be specified as amendments to existing (pre-Release 7) Technical Specifications (3GPP TS 26.235 [3] and 3GPP TS 26.236 [4]) and possibly new Technical Specifications. Furthermore, a characterization of the optimized multimedia telephony over IMS will be available in a separate Technical Report. |
26.917 | Multimedia Broadcast Multicast Services (MBMS) and Packet-switched Streaming Service (PSS) enhancements to support television services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.917/26917-i00.zip | The present document collects use cases, recommended requirements, architectural considerations, gaps, and optimization potentials for PSS and MBMS User Services in order to enable Television Services on top of PSS/MBMS User Services and MBMS bearer services. The present document also provides conclusions and recommendations for normative work. |
26.918 | Virtual Reality (VR) media services over 3GPP | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.918/26918-i00.zip | The scope of the present document is to investigate the relevance of Virtual Reality in the context of 3GPP. Virtual Reality is the ability to be virtually present in a non-physical world created by the rendering of natural and/or synthetic image and sound correlated by the movements of the immersed user allowing to interact with that world. With recent progress made in rendering devices, such as Head mounted displays (HMD), a significant quality of experience can be offered. By collecting comprehensive information on VR use cases, existing technologies and subjective quality, the report attempts to identify potential gaps and relevant interoperability points that may require further work and potential standardization in 3GPP in order to support VR use cases and experiences in 3GPP user services. The report primarily focuses on 360 degrees video and associated audio, which support three degrees of freedom (3DOF). |
26.919 | Study on media handling aspects of conversational services in 5G systems | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.919/26919-i00.zip | The present document provides a study on the media handling aspects of conversational services in 5G, taking as baseline the Stage-1 requirements developed in TS 22.261 [2], as well as the Stage-2 architecture for 5G systems developed in TS 23.501 [3]. This includes the investigation of the following areas:
- Media handling aspects of the 5G system architecture in relation to 3GPP conversational services, e.g., Multimedia Telephony Service over IMS (MTSI) in TS 26.114 [4] and IMS-based Telepresence Service in TS 26.223 [5].
- Relevance and potential reuse of components in existing 3GPP conversational services (e.g., MTSI, IMS-based telepresence, etc.) in the context of 5G systems and related Stage-2 architecture, e.g., use of MTSI features for supporting voice and video calls, use of MTSI, MS-MTSI and IMS-telepresence features for supporting multi-party conferencing, and applicability of existing QoE monitoring and QoS handling mechanisms.
- Potential enhancements to existing 3GPP conversational services (e.g., MTSI, IMS-based telepresence, etc.) towards better fulfilling the Stage-1 requirements in TS 22.261, e.g., in terms of criteria such as latency and bandwidth efficiency, while also taking into consideration the Stage-2 architecture for 5G systems:
- In case existing codecs are unable to address 5G application requirements, new media codec requirements for 3GPP conversational services may be developed.
- The need for, and potential use of, new QoS media handling mechanisms in 5G systems such as traffic classification and codec-aware network elements in the context of 3GPP conversational services.
The gap analysis of the above areas and associated recommendations and conclusions for the proposed improvements are documented in the present document. |
26.921 | Investigations on ambient noise reproduction systems for acoustic testing of terminals | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.921/26921-i00.zip | The present document provides a collection of investigations on aspects of UE performance in the presence of ambient noise related to the 3GPP terminal testing specifications TS 26.132 [3] and/or performance requirements per TS 26.131 [2].
The evaluation of terminals in conjunction with speech signals and realistic background noise tests as well as performance requirements were added in Release 11 of these specifications. Increased signal processing capabilities facilitated more sophisticated noise reduction functionality in terminals already before this release. However, an incorrect or mistuned device may substantially impact speech quality, intelligibility/listening effort and user experience in general.
The present document focuses on the evaluation of terminals in handset and hands-free mode, but also other related aspects like, e.g., accuracy of noise field simulations are taken into account. |
26.922 | Video telephony robustness improvements extensions; Performance evaluation | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.922/26922-i00.zip | The present document reports the study on video telephony robustness improvements extensions in Multimedia Telephony Service for IMS (MTSI) and provides recommendation on their applicability for MTSI video telephony applications. |
26.923 | Study on media handling aspects of IP Multimedia Subsystem (IMS) based telepresence | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.923/26923-i00.zip | The present document provides a study on the media handling aspects of IMS-based telepresence in 3GPP services. This includes the investigation of the following areas:
- Media codecs (speech, video, real-time text) for IMS-based telepresence.
- Media configuration including session setup and control procedures for IMS-based telepresence, and media provisioning aspects of capability negotiation based on SDP and CLUE protocols, etc.
- Set-up and control of the individual media streams between clients including interactivity, such as adding and dropping of media components, as well as end-to-end QoS handling, etc. for IMS-based telepresence.
- Data transport including usage of RTP / RTCP protocols, RTP profiles, RTP payload formats, RTP mapping, media synchronization, etc. for IMS-based telepresence, e.g. in relation to negotiation and establishment of the CLUE data channel, and exchange of CLUE ADVERTISEMENT and CONFIGURE messages.
- Requirements and guidelines for media adaptation in IMS-based telepresence, for example in response to changes of network bandwidth.
- Media handling requirements and guidelines for fixed-mobile interworking as well as interworking with MTSI and with GSMA's IMS profile on High-Definition Video Conference (HDVC) service in IR.39.
The gap analysis of the above areas and associated recommendations and conclusions for the proposed improvements are documented in the present document. Study and evaluation of end-to-end quality of experience (QoE) for IMS-based telepresence use cases for various codec, media handling and QoS configurations are also presented. |
26.924 | Multimedia telephony over IP Multimedia Subsystem (IMS); Study on improved end-to-end Quality of Service (QoS) handling for Multimedia Telephony Service for IMS (MTSI) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.924/26924-i00.zip | TS 26.114 define media handling and interaction for the Multimedia Telephony Service for IMS (MTSI) including mechanisms for the negotiation of bandwidth using the SDP bandwidth modifiers. The present study investigates potential improvements for the end-to-end QoS handling with the purpose to improve the network resource allocation for variable bit-rate codecs, rate-adaptive codecs and asymmetric sessions (i.e. different bitrates for different directions). The study will focus on SDP extensions and the interaction with the policy control.
The present document:
- 1 – Identifies high-level use cases
- 2 – Evaluates for these use cases the current limitations and the expected benefits
- 3 – Establishes recommended high-level functional requirements and related recommended technical requirements
- 4 – Discusses potential solutions
- 5 – Studies impact of potential solutions on networks and terminals |
26.925 | Typical traffic characteristics of media services on 3GPP networks | TR | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.925/26925-i10.zip | |
26.926 | Traffic Models and Quality Evaluation Methods for Media and XR Services in 5G Systems | TR | 18.2.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.926/26926-i20.zip | |
26.927 | Study on Artificial Intelligence and Machine learning in 5G media services | TR | 0.11.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.927/26927-0b0.zip | |
26.928 | Extended Reality (XR) in 5G | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.928/26928-i00.zip | The present document collects information on eXtended Reality (XR) in the context of 5G radio and network services. The primary scope of the present document is the documentation of the following aspects:
- Introducing Extended Reality by providing definitions, core technology enablers, a summary of devices and form factors, as well as ongoing related work in 3GPP and elsewhere,
- Collecting and documenting core use cases in the context of Extended Reality,
- Identifying relevant client and network architectures, APIs and media processing functions that support XR use cases,
- Analysing and identifying the media formats (including audio and video), metadata, accessibility features, interfaces and delivery procedures between client and network required to offer such an experience,
- Collecting key performance indicators and Quality-of-Experience metrics for relevant XR services and the applied technology components,
- Drawing conclusions on the potential needs for standardisation in 3GPP. |
26.929 | QoE parameters and metrics relevant to the Virtual Reality (VR) user experience | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.929/26929-i00.zip | The present document provides a study on the QoE metrics relevant to VR service. The study focuses on:
- Defining a device reference model for VR QoE measurement points.
- Studying key performance indicators that may impact the experience of VR service.
- Identifying the existing QoE parameters and metrics defined in SA4 standards such as TS 26.247, TS 26.114 which are relevant to Virtual Reality user experience;
- Identifying and defining new QoE parameters and metrics relevant to Virtual Reality user experience, taking into consideration the use cases listed in TR 26.918, and any sources that show the relevance of new metrics, e.g. scientific literature, specifications/solutions from other standard organizations.
- Analysing potential improvements to the existing QoE reporting so as to better accommodate VR services.
- Providing recommendations to future standards work in SA4 on the QoE parameters and metrics and, as necessary, coordinate with other 3GPP groups and external SDOs, e.g. MPEG, ITU-T. |
26.930 | Study on the enhancement for Immersive Real-Time communication for WebRTC | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.930/26930-i00.zip | The present document extends immersive Real-time Communication for WebRTC (iRTCW) and introduces a new concept called native WebRTC signalling.
This document includes following aspects:
1. Analysis of gaps and required enhancements of terminal device and network architectures including additional functional entities (e.g., WebRTC Signalling Server, ICE-STUN Server, IMS Interworking Gateway, NNI Gateway).
2. Impacts and possible enhancements for the WebRTC-based U-plane components in terms of adaptation, media handling, and cross-layer optimizations over 5G systems.
3. C-Plane signalling protocol details (e.g., based on JSON) for the common WebRTC-based immersive RTC session management.
4. Information elements in the C/U-Plane signal (including NNI) to enhance connectivity of media sessions with carrier assistance for WebRTC-based applications (including OTT applications).
5. Minimal functional capabilities needed to support the enhancements identified in 2, 3 and 4 (including transport, NAT-traversal, and XR conferencing), state transitions, and typical call flows.
6. Consideration of collaboration formation with other WGs in 3GPP and SDOs including IETF and W3C.
7. Enhancements for E2E QoS realizations over 5G systems for communications between MNOs and WebRTC clients operating over 5G access or non-5G access (e.g., Wi-Fi) using WebRTC-based transport. This also includes communication between WebRTC clients operating on tethering/tethered devices.
8. Security aspects and rate adaptation in tethered use cases (including coordination of Uu and non-3GPP access).
One of the main scopes of this document is to study the enhancements of RTC network for supporting collaboration scenario 4 specified in 3GPP TS 26.506 [12]. Collaboration scenario 4 enables inter-operable WebRTC services, which is extended collaboration scenario 3 with functions to support MNO to MNO inter-operability. This collaboration scenario 4 could include the roaming case, but this case is outside the scope of this document. |
26.931 | Evaluation of Additional Acoustic Tests for Speech Telephony | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.931/26931-i00.zip | The scope of the present document is to investigate, first and foremost, the existing items presently designated as "for further study" in TS 26.131 [13] and TS 26.132 [8].
The investigation will additionally identify, examine and evaluate opportunities for new acoustic tests and requirements that better help characterize the UE acoustic experience, opportunities to replace existing test methods with others that are more accurate or more efficient and to make specific recommendations for their inclusion in existing or new specifications.
While many advances were made in Release 11 to the acoustic requirements and test specifications in TS 26.131 [13] and TS 26.132 [8] many items therein were left marked "for further study" and require a final disposition by SA4 including:
- NB & WB Stability loss, Headset UE (TS 26.131 [13], subclauses 5.6 & 6.6).
- NB & WB Delay, Wireless Headset (TS 26.131 [13], subclauses 5.12.2.2 & 6.11.2.2).
- NB & WB Echo control ("double-talk") characteristics (TS 26.131 [13], subclauses 5.13 & 6.12, TS 26.132 [8], subclause 8.11).
- Handset, Headset, Handheld hands-free, Desktop and vehicle mounted hands-free are all marked FFS.
- NB& WB Free-field measurements for vehicle-mounted hands-free (TS 26.132 [8], subclauses 7.2.3 & 8.2.3).
- NB & WB Idle Channel Noise, Sending/Receiving of test signal (TS 26.132 [8], subclauses 7.3.1, 7.3.2, 8.3.1 & 8.3.2).
Additionally, there are new acoustic requirements and emerging tests that may be considered in a future release, but require further study before incorporation to our specifications. It has been anticipated that topics in this area would include, but would not be limited to, an evaluation of:
- Time-variant user behaviour.
- Additional UE usage environments.
- New or refined test methods for existing requirements.
- Acceptance of updates (if any) to existing ETSI and ITU-T dependencies. |
26.935 | Packet Switched (PS) conversational multimedia applications; Performance characterisation of default codecs | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.935/26935-i00.zip | The present document provides information on the performances of default speech codecs in packet switched conversational multimedia applications. The codecs under test are AMR-NB (Adaptive Multi-Rate Narrowband) and AMR-WB (Adaptive Multi-Rate Wideband). In addition, several ITU-T codecs (G.723.1, G.729, G.722 and G.711) are included in the testing. Experimental test results from the speech quality testing are reported to illustrate the behaviour of these codecs.
The results give information of the performance of PS conversational multimedia applications under various operating and transmission conditions (e.g., considering radio transmission errors, IP packet losses, end-to-end delays, and several types of background noise). The performance results can be used e.g. as guidance for network planning and to appropriately adjust the radio network parameters. |
26.936 | Performance characterization of 3GPP audio codecs | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.936/26936-i00.zip | The present document comprises the Technical Report for the Characterization of the 3GPP Audio Codecs, Enhanced aacPlus (Eaac+) and Extended AMR-WB (AMR-WB+), standardized by 3GPP in Release 6 for Packet-switched Streaming Service (PSS), Multimedia Messaging Service (MMS), Multimedia Broadcast and Multicast Service (MBMS), and IMS Messaging Service and Presence Service. |
26.937 | Transparent end-to-end Packet-switched Streaming Service (PSS); Real-time Transport Protocol (RTP) usage model | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.937/26937-i00.zip | The objective of this document is to characterise the 3GPP Packet-switched Streaming Service (PSS). In doing so, the document considers the impacts of the underlying network configurations and how the streaming mechanism itself could be optimised.
The scope of this document includes consideration of (non-exhaustive):
- Trade-off between radio usage efficiency and streaming QoS
- Feedback of network conditions and adaptation of stream and/or the transmission of the stream
- Optimal packetisation of the media stream in line with the segmentation within the transport mechanism
- Error robustness mechanisms (such as retransmission)
Client buffering to ease the QoS requirements on the network and enable more flexibility in how the network transport resources are applied. |
26.938 | Packet-switched Streaming Service (PSS); Improved support for dynamic adaptive streaming over HTTP in 3GPP | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.938/26938-i00.zip | The present document covers
- deployment guidelines for DASH in 3GPP networks and architectures,
- use cases for the improved support of DASH in 3GPP networks and architectures as well as requirements to support those use cases,
- recommendations for potentially necessary normative specification work in 3GPP,
- recommendations for the documentation of potentially informative guide lining work. |
26.939 | Guidelines on the Framework for Live Uplink Streaming (FLUS) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.939/26939-i00.zip | |
26.941 | Network Slicing Extensions for 5G media services | TR | 18.1.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.941/26941-i10.zip | |
26.943 | Recognition performance evaluations of codecs for Speech Enabled Services (SES) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.943/26943-i00.zip | This technical report provides information on the recognition performance of the DSR Extended Advanced Front End conducted by speech recognition vendors IBM and Scansoft for the selection of a codec for Speech Enabled Services. The performance results are provided both as absolute word error rates for DSR and AMR-NB/AMR-WB on a range of extensive evaluation databases and as relative word error rate reductions when compared to both the AMR-NB and AMR-WB codecs. |
26.944 | End-to-end multimedia services performance metrics | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.944/26944-i00.zip | The present document describes and defines performance metrics for popular multimedia services in 3G networks, including packed-switched streaming service (PSS), multimedia broadcast multicast service (MBMS), video telephony (VT), and IP multimedia subsystem service (IMS). The present document has a top-down approach, which starts with the Quality of Experience (QoE) parameters and metrics, and then provides End-to-end Service QoS (ESQoS) and System Quality of Service (SQoS) parameters and metrics and mapping between these different layers. |
26.946 | Multimedia Broadcast/Multicast Service (MBMS) user service guidelines | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.946/26946-i00.zip | The present document is only informative. In case there are any contradiction between the present document and 26.346, then the 3GPP TS 26.346 takes precedence. |
26.947 | Multimedia Broadcast/Multicast Service (MBMS); Selection and characterisation of application layer Forward Error Correction (FEC) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.947/26947-i00.zip | The present document documents the progress of the work item to investigate and evaluate proposed FEC technologies and adopt one which provides the most significant enhancement to the performance of the MBMS system over the Release 6 application layer FEC in MBMS. |
26.948 | Study on video enhancements in 3GPP multimedia services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.948/26948-i00.zip | The present document reports the study on video enhancements in 3GPP multimedia services. It firstly provides an overview of the video codecs and their configurations specified for existing 3GPP multimedia services, namely 3GP-DASH (TS 26.247 [1]), PSS (TS 26.234 [2]), MBMS (TS 26.346 [3]), MTSI (TS 26.114 [4], including multi-stream multiparty video conferencing), MMS (TS 26.140 [5]), and IMS Messaging and Presence (TS 26.141 [6]). Then use cases on video enhancements for existing 3GPP multimedia services are discussed, including a discussion on potential codec solutions for each of the use cases. To enable drawing conclusions, simulation conditions and simulation results for comparisons of different codecs and their configurations are provided. Performance is evaluated in typical 3GPP service environments taking into account bandwidth, quality and complexity. Based on the performance results, conclusions are made in terms of recommendations for support of enhanced video capabilities for 3GPP multimedia services. |
26.949 | Video formats for 3GPP services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.949/26949-i00.zip | The scope of the present document is to support the generation of a technical specification which defines a limited set of operation points for TV services in order to enable a consistent service offering within 3GPP. For this purpose the present document collects relevant information from other organizations and summarizes and consolidates these findings. Additional 3GPP specific aspects on TV profiles (such as existing and emerging UE capabilities, delivery enablers, or specific service aspects) are collected and put in context. |
26.950 | Study on Surround Sound codec extension for Packet Switched Streaming (PSS) and Multimedia Broadcast/Multicast Service (MBMS) | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.950/26950-i00.zip | The present document investigates the potential user experience benefits of surround audio in 3GPP services. The investigation will be performed as follows:
- Identify and document relevant use cases for surround sound in 3GPP.
- Define design constraints that would need to be met by a surround audio codec extension method for adoption by 3GPP.
- Identify suitable testing methodology for surround sound in relevant use cases of the PSS and MBMS services.
- Define subjective minimum performance criteria that would need to be met in order to motivate the consideration of a surround audio coding extension for adoption by 3GPP.
- Validate the user benefits and the feasibility of the deployment of surround sound for the PSS and MBMS services according to the defined minimum performance criteria, bit rate and design constraints for all the use cases (such as surround sound speaker set-up and headphone decoding mode) through evaluation of at least one example of surround sound coding methods which may be MPS. |
26.952 | Codec for Enhanced Voice Services (EVS); Performance characterization | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.952/26952-i00.zip | The present document provides information on the Enhanced Voice Services (EVS) codec Selection, Verification and Characterization Phases which were run using the fixed-point code (3GPP TS 26.442). Experimental test results from the subjective quality testing are reported to illustrate the behaviour of the EVS codec. Additional information is provided on implementation complexity of the EVS codec and objective test results. Also the verification results for the floating-point version of the EVS codec (3GPP TS 26.443) are presented. |
26.953 | Interactivity support for 3GPP-based streaming and download services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.953/26953-i00.zip | The present document covers the study of interactivity support for 3GPP-based streaming and download services, in the context of services delivery over MBMS and PSS. Topical areas addressed include the following:
- Use cases and associated assumptions, recommended requirements and gap analyses on the operation of and means to support interactivity capabilities in streaming and download services.
- End-to-end architecture and functional component models, with emphasis on unicast and broadcast DASH services.
- Differentiation between application/presentation level and transport/service layer functions in support of interactive services.
- Overview of service interactivity mechanisms in terrestrial broadcast TV services, as defined in DVB and ATSC specifications.
- Notification mechanisms to activate interactive events, either pre-scheduled or to occur dynamically and unpredictably, at precise times during consumption of a main service or program.
- Functional gaps in current MBMS and PSS application/service layer specifications to support desired interactivity functions.
- Measurement and reporting of the consumption of interactive features. |
26.954 | Test plan for speech quality and delay through a headset electrical interface | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.954/26954-i00.zip | The present document provides guidance on testing of speech quality and delay through a UE headset electrical interface, including both analog and digital headset interfaces. The present document includes test set-up configurations, measurement scenarios and an indication of a range of results that can be expected in measurements. It is envisioned that the present document will serve as a reference for UE vendors and Mobile Network Operators wishing to conduct such tests. |
26.955 | Video codec characteristics for 5G-based services and applications | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.955/26955-i00.zip | The present technical report documents relevant interoperability requirements, performance characteristics and implementation constraints of video codecs in 5G services, and characterizes video codecs, in particular 3GPP defined codecs H.264/AVC and H.265/HEVC in order to have a benchmark for the addition of potential future video codecs. For this purpose, the document:
- Collects a summary of the video coding capabilities in 3GPP services.
- Collects a subset of relevant scenarios for video codecs in 5G-based services and applications, including video formats (resolution, frame rates, colour space, etc.), encoding and decoding requirements, adaptive streaming requirements.
- Collects relevant and exemplary test conditions and material for such scenarios, including test sequences.
- Defines performance metrics for such scenarios with focus on objective performance metrics.
- Collects relevant interoperability functionalities and enabling elements for video codecs in different 5G services such as MTSI and Telepresence (i.e. RTP based conversational communications), or 5G media streaming (e.g. based on DASH/CMAF) supporting the identified scenarios.
- Collects relevant criteria and key performance indicators for the integration of video codecs in 5G processing platforms, taking into account factors such as encoding and decoding complexity in the context of the defined scenarios.
- Provides anchors for the existing codecs H.264/AVC and H.265/HEVC in the context of the above scenarios and document the findings in a consistent manner and characterizes H.265/HEVC against H.264/AVC
- Provides initial information on EVC video codec developed in ISO/IEC SC29 WG 4 and H.266/VVC video codec developed in JVET (ITU-T SG16 Q6 and ISO/IEC SC29 WG 5) in the context of the above scenarios, including test streams and characterization results.
- Provides initial information AV1 video codec developed by the Alliance for Open Media in the context of the above scenarios, including test streams and characterization results. |
26.957 | Study on Server And Network-assisted Dynamic Adaptive Streaming over HTTP (DASH) (SAND) for 3GPP multimedia services | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.957/26957-i00.zip | The present document evaluates the MPEG DASH SAND (ISO/IEC 23009-5) specification to:
- Ensure that 3GPP and MPEG remain aligned on their respective DASH specifications.
- Identify enhancements offered by MPEG DASH SAND (ISO/IEC 23009-5) in the 3GPP environment, and recommend necessary modifications to the 3GPP specifications including DASH to enable these enhancements.
In particular, the following elements of functionality may be of particular 3GPP relevance and are studied:
- Streaming enhancements via intelligent caching, processing and delivery optimizations on the server and/or network side, based on feedback from clients on anticipated DASH Segments, accepted alternative DASH Representations and Adaptation Sets, and requested bandwidth.
- Improved adaptation on the client side, based on network/server-side information such as cached Segments, alternative Segment availability, and network throughput/QoS. |
26.959 | Study on enhanced Voice over LTE (VoLTE) performance | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.959/26959-i00.zip | The present document provides a study on the enhanced VoLTE performance (eVoLP). The study focuses on:
- Guidelines or requirements to ensure that MTSI clients send requests to adapt to robust modes of codec operation when necessary. This study may require investigating performance results for different conditions and adaptation procedures.
- Mechanisms to indicate at setup a terminal's ability to send adaptation triggers (e.g. to adapt to the most robust codec mode).
- Evaluate the impact of proprietary client implementations of Packet-Loss Concealment and Jitter Buffer Management (JBM) on having different Max PLR and potential mechanisms to indicate this to the network. |
26.962 | Immersive Teleconferencing and Telepresence for Remote Terminals (ITT4RT) Operation and Usage Guidelines | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.962/26962-i00.zip | |
26.966 | Evaluation of new HEVC coding tools | TR | 18.0.0 | S4 | https://www.3gpp.org/ftp/Specs/archive/26_series/26.966/26966-i00.zip | This Technical Report gathers the opportunities for improving HEVC-based services. This includes documentation of motivating use cases and scenarios. Specifically, potential of improving on the following use cases are identified: the compression performance for stereoscopic 3D content, the network performance related to exploding adaptive streaming traffic, and the demands for very high-quality image applications. HEVC based solutions to address each opportunity are identified: HEVC Multiview profiles, HEVC Scalable profiles, and HEVC 4:4:4 (up to 10 bits) capable profiles. Methodologies to investigate and document the pros and cons of the proposed solutions for each use case are documented. Finally, conclusions are drawn on the relevancy of solutions and if any new normative specification work is to be done. |
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