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Yeah.
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And they they did a lot of experiments where th where , um , they take speech and , um , e they modify the , uh they they they measure the relative importance of having different , um , portions of the modulation spectrum intact.
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Yeah.
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And they find that the the spectrum between one and sixteen hertz in the modulation is , uh is im important for speech recognition.
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Sure. I mean , this sort of goes back to earlier stuff by Drullman.
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Um.
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And and , uh , the the MSG features were sort of built up with this notion
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Yeah. Right.
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But , I guess , I thought you had brought this up in the context of , um , targets somehow.
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Right.
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But i m
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Um
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i it 's not I mean , they 're sort of not in the same kind of category as , say , a phonetic target or a syllabic target
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Mmm. Mm - hmm.
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or a
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Um , I was thinking more like using them as as the inputs to to the detectors.
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or a feature or something. Oh , I see. Well , that 's sort of what MSG does.
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Yeah. Yeah.
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Right ? So it 's
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Mm - hmm.
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But but , uh
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Yeah.
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Yeah.
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Anyway , we 'll talk more about it later.
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So I guess this is more or less now just to get you up to date , Johno. This is what , uh ,
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This is a meeting for me.
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um , Eva , Bhaskara , and I did.
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Did you add more stuff to it ? later ?
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Um. Why ?
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Um. I don't know. There were , like , the you know , @ @ and all that stuff. But. I thought you you said you were adding stuff
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Uh , no.
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but I don't know.
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This is Um , Ha ! Very nice. Um , so we thought that , We can write up uh , an element , and for each of the situation nodes that we observed in the Bayes - net ? So. What 's the situation like at the entity that is mentioned ? if we know anything about it ? Is it under construction ? Or is it on fire or something happening to it ? Or is it stable ? and so forth , going all the way um , f through Parking , Location , Hotel , Car , Restroom , @ @ Riots , Fairs , Strikes , or Disasters.
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So is This is A situation are is all the things which can be happening right now ? Or , what is the situation type ?
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That 's basically just specifying the the input for the w what 's
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Oh , I see y Why are you specifying it in XML ?
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Um. Just because it forces us to be specific about the values here ?
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OK.
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And , also , I mean , this is a what the input is going to be. Right ? So , we will , uh This is a schema. This is
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Well , yeah. I just don't know if this is th l what the Does This is what Java Bayes takes ? as a Bayes - net spec ?
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No , because I mean if we I mean we 're sure gonna interface to We 're gonna get an XML document from somewhere. Right ? And that XML document will say " We are able to We were able to observe that w the element , um , @ @ of the Location that the car is near. " So that 's gonna be Um.
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So this is the situational context , everything in it. Is that what Situation is short for , shi situational context ?
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Yep.
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OK.
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So this is just , again , a an XML schemata which defines a set of possible , uh , permissible XML structures , which we view as input into the Bayes - net. Right ?
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And then we can r uh possibly run one of them uh transformations ? That put it into the format that the Bayes n or Java Bayes or whatever wants ?
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Yea - Are you talking are you talking about the the structure ?
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Well it
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I mean when you observe a node.
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When you when you say the input to the v Java Bayes , it takes a certain format ,
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Um - hmm.
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right ? Which I don't think is this. Although I don't know.
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No , it 's certainly not this. Nuh.
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So you could just Couldn't you just run a
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XSL. Yeah.
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Yeah. To convert it into the Java Bayes for format ?
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Yep.
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OK.
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That 's That 's no problem , but I even think that , um I mean , once Once you have this sort of as running as a module Right ? What you want is You wanna say , " OK , give me the posterior probabilities of the Go - there node , when this is happening. " Right ? When the person said this , the car is there , it 's raining , and this is happening. And with this you can specify the what 's happening in the situation , and what 's happening with the user. So we get After we are done , through the Situation we get the User Vector. So , this is a
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So this is just a specification of all the possible inputs ?
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Yep. And , all the possible outputs , too. So , we have , um , for example , the , uh , Go - there decision node
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OK.
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which has two elements , going - there and its posterior probability , and not - going - there and its posterior probability , because the output is always gonna be all the decision nodes and all the the a all the posterior probabilities for all the values.
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And then we would just look at the , eh , Struct that we wanna look at in terms of if if we 're only asking about one of the So like , if I 'm just interested in the going - there node , I would just pull that information out of the Struct that gets return that would that Java Bayes would output ?
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Um , pretty much , yes , but I think it 's a little bit more complex. As , if I understand it correctly , it always gives you all the posterior probabilities for all the values of all decision nodes. So , when we input something , we always get the , uh , posterior probabilities for all of these. Right ?
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OK.
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So there is no way of telling it t not to tell us about the EVA values.
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Yeah , wait I agree , that 's yeah , use oh , uh Yeah , OK.
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So so we get this whole list of of , um , things , and the question is what to do with it , what to hand on , how to interpret it , in a sense. So y you said if you " I 'm only interested in whether he wants to go there or not " , then I just look at that node , look which one
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Look at that Struct in the output ,
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Yep.
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right ?
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Look at that Struct in the the output , even though I wouldn't call it a " Struct ". But.
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Well i well , it 's an XML Structure that 's being res returned ,
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Oh. Mm - hmm.
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right ?
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So every part of a structure is a " Struct ". Yeah.
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Yeah , I just uh I just was abbreviated it to Struct in my head , and started going with that.
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That element or object , I would say.
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Not a C Struct. That 's not what I was trying to k
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Yeah.
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though yeah.
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OK. And , um , the reason is why I think it 's a little bit more complex or why why we can even think about it as an interesting problem in and of itself is Um. So. The , uh Let 's look at an example.
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Well , w wouldn't we just take the structure that 's outputted and then run another transformation on it , that would just dump the one that we wanted out ?
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Yeah. w We 'd need to prune. Right ? Throw things away.
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Well , actually , you don't even need to do that with XML.
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No
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D Can't you just look at one specific
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Yeah , exactly. The @ @ Xerxes allows you to say , u " Just give me the value of that , and that , and that. " But , we don't really know what we 're interested in before we look at the complete at at the overall result. So the person said , um , " Where is X ? " and so , we want to know , um , is Does he want info ? o on this ? or know the location ? Or does he want to go there ? Let 's assume this is our our question.
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Sure.
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Nuh ? So. Um. Do this in Perl. So we get OK. Let 's assume this is the output. So. We should con be able to conclude from that that I mean. It 's always gonna give us a value of how likely we think i it is that he wants to go there and doesn't want to go there , or how likely it is that he wants to get information. But , maybe w we should just reverse this to make it a little bit more delicate. So , does he wanna know where it is ? or does he wanna go there ?
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He wants to know where it is.
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Right. I I I tend to agree. And if it 's If
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Well now , y I mean , you could
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And i if there 's sort of a clear winner here , and , um and this is pretty , uh indifferent , then we then we might conclude that he actually wants to just know where , uh t uh , he does want to go there.
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Uh , out of curiosity , is there a reason why we wouldn't combine these three nodes ? into one smaller subnet ? that would just basically be the question for We have " where is X ? " is the question , right ? That would just be Info - on or Location ? Based upon
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Or Go - there. A lot of people ask that , if they actually just wanna go there. People come up to you on campus and say , " Where 's the library ? " You 're gonna say y you 're gonna say , g " Go down that way. " You 're not gonna say " It 's It 's five hundred yards away from you " or " It 's north of you " , or " it 's located "
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Well , I mean But the there 's So you just have three decisions for the final node , that would link thes these three nodes in the net together.
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Um. I don't know whether I understand what you mean. But. Again , in this Given this input , we , also in some situations , may wanna postulate an opinion whether that person wants to go there now the nicest way , use a cab , or so s wants to know it wants to know where it is because he wants something fixed there , because he wants to visit t it or whatever. So , it n I mean a All I 'm saying is , whatever our input is , we 're always gonna get the full output. And some some things will always be sort of too not significant enough.
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Wha Or i or i it 'll be tight. You won't it 'll be hard to decide.
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