thank so i make a bit like and uh and i will present our paper called converting a one one all audio recordings to be a format for directional audio coding with blocks right long a let's score so yeah yes line of the presentation so i was that like to be an introduction to the topic and then give you some background information about this and then the actual something and i will and with some conclude so yeah several parametric spatial audio coding methods for example and pixel round or a parametric stereo it's that a but and they are really good but to become a they have some certain kind of reproduction system for some stereo or five point one so it would be perhaps nice if we could have some kind of oh any kind of in to the system and and it would also reduce the sound using any reproduction system but some any loudspeaker layout or what sample head so what you have in deal you've ever been in our universe these this thing all the directional audio coding all the know and this this thing to use this as the form in input and you can use any loss speaker layout as a for reproduction and also had poles so we think that the uh that would be perhaps a suitable can that for this kind of generate only a form and in this study i will think about what that for example white one one or something that is really common on no more well multichannel reproduction so i ones uh study about and of buy been studying about could we can will convert these five one one signal that's to be for and we would be we them with a directional audio coding without that any artifacts and then in this case your case for example we tried to not a point one one and get a set and that of reproduction of a sets of sound and get the same thing through this can of and and the uh these directions audio coding reproduction production so first i will so you something about this the are technology so the basic idea and is it that we don't try to reproduce the sound really physically for right instead we tried to reproduce it in a way that it would be perceptually correct so how we perceive does some real would be the say as in the original space and that possible see its for this technology would be for simple telephone thing and also spatial sound reproduction and that's i set the input to this uh processing is the form three so it contains a the directional signal W and and die X Y and set which uh direct that along the coding case of a to connotation that's just so what we so to is that we process the sum some in time-frequency frequency domain and why we do this is that we tried to me the temporal and also the frequency resolution of of yeah so we try to do with the same resolution solution that's our hearing system works and next let's think about what should we and the last of the sound so we are do the analysis for each time for it's time to get is things without L uh much to the solution and uh first would be to do is we analyzed the direction of sound so so simply just wait it coming for left right up don't so on and then we have this another parameter was called diffusion as which is this uh means that is the sound coming only for certain direction is it like a minute weight or always it got that's completely diffuse coming from all directions but like for example reparation to be or is it something in a we and yeah is the scene that is part of processing and the whole block diagram of we you can see so as you get see yeah we done by this time we is the composition for simple using a short time fourier transform and then we do the processing separately for each frequency that so we get use a direction analysis results from yeah and what we do that the old your that is that we create these kind of work so might of course which can be a sample uh card us to was lots to a store this really similar to first order ambisonics these these H but the take what we do is that we divide the sum of two different it's is for known used three and the is used to be and we break reduce them you know different way and for the don't need used three we assume that it basic a for of the direct sum so we try to rep reduce it that's a point like source using for example i'm to to binding or in three D case vector base base and it would kind and for the diffuse if you stream we ask them that it's rounding so for example real so what we want to get a get a kind of and by her section so what we want to use a for some but the correlation to get it running and in the and we use these two streams and also the all frequency bands and we get a a a a uh lots a C and using this made up with the in it that's been studied for a couple of years and you can get quite nice audio for for real recordings with a a form a microphone so let's scroll next to the actual topic what by we get a like what we were studying in this right so how to really convert this kind of wine five point one audio recordings to be much so at first it seems really seem also what we simply can do which we problem from this kind of well lot record so we position the loudspeakers according to itu standard and then we just assume that we are in a a it works space and we perform kind of words the recording with the people microphone is really simple be can use simple cosine on a sine functions for this but however there were some problems that we power so if if about how human yes this kind of reproduction if you have some the if use of a reverberant something part one one case we perceive is it as the diffuse and around but if you think about how there there a nice is analysis works in this case as i said before that the diffuse nest is one you we have sound coming E from all directions and also these is i think the is also true in that you think about what is stiff use field but in this case we have a most of the last because i in the problem so we don't have equal energy coming from all directions and i so a result we have a low weight use nist and one and what this course is that the we get the by guess of sound source the to send the lot be and it's not received to be completely diffuse and surrounding the solve that this is something of course that we don't cool that we got the second idea how to fix this problem is that we isn't the speakers equally around the we form a microphone and this is was working quite nice that the now you get the diffuse sound coming from all directions T and you get to correct used as well and also you that quite nice all your quality but the problem is of course that no the loudspeakers a it wrong basis because if you think about do you should have a sound so that what simple minus the decrease but now we have a feature that sound source here so we get kind of a by in the reproduction which we of course can point to by in the reproduction side that assume that we have a speakers at those direction but we might have also really people my reporting which you would might perhaps too much much these uh one but it seeing as and in this case you would have a wrong directions in i don't of case so we need something more a lab right to get is as function in all that the time and then we have a i will present this but that that we propose a would be that a so what we do is that for the directional provost some for example a sources or direct sound of the uh sound we use the standard layout so for that part we get the directions right and that is of course the important in that and if we have some reference some then we used even layout to get the diffuse is that you correct and this is really nice in a way because the both directions and the diffuse nist a correct when they are the most in four oh let's look at the block diaphragm so we do the analysis and a a frequency domain so we start by these time because of the composition and what we do is we can you these we watch other be not signals use the even and layout and the standard let loudspeaker layer and what we do is we simply a these two three is a holding to the D C use ms of the summer of the some you and we do that analysis using these you and lots of light and we can see cross fade or was played between these two three to get the most the people three and we have seen that these would be quite close to but it should be ten next we what we do the and less the diffuse as again if this is correct now and we see from here that if we think about this re line each the diffuse this can do with that even a speaker layout we get correct it used where with this standard layout we would get to load diffuse noise so we can see that if we much we we these two streams we get correct if used as if it's really high or really low but in the be no be get a kind of a little bit and the estimation so we need to by a big for so let's look got this if use this take of once small the see would be a would be more five to get a correct if used so we can see yeah that this is the uh pressure and this is the part of as so we can see that these if these are quite P well the whole term yeah is white white and you get that all that the use this is really low and so if that a particle velocity well basically the dipole signals and all me that's of uh he but we get a low here and on the very if you have if these two so it's a i different we can really low uh but for this um so we get right so we can simply money by the diffusion is by at just in the ratio between the only a directional signal and the dipole signals of the beep oh this is actually done you need a bunch of equations and i would not give you hear but you can read from the paper if you in so let's go back to the this block diagram so we can see that we on but the that if used as well use and we get this kind of a uh coefficients for access to the these used and it the next stage we simply molded by uh the the so signal and the died signals so we get the final we almost three so we can use them to a use these thing as reproduce the sound we get a and we also can it with the other the real people are recordings for example yeah we didn't do for only saying this yet but at least according to in formal test we didn't we didn't find to be put course any degradation of of audio or you probably so as of convolution that audio an audio coding or get out is a perceptually motivated method to reproduce spatial sound and it has been a before using mainly be you for my or us that in and so in this paper or the idea was that could we use also for simple life one S to in to these uh reproduction method in order to have for example these kind of check audio for and we showed to use i thought use a two simple matrix in based methods but they had some problems both of and the proposed method in there we analyse the virtual sound field generated by the five point one or and we do the analysis in the time frequency my uh and by using this we were able to do these kind of people a and that we did not find two uh the rate the audio quality and also we and uh makes the resulting be not that's with other be signals yeah some acknowledgements and i would like to check yeah i i hmmm i i i more yeah yeah i this in physical they are not a at all the say what perceptual at the same at these like one to lower in format test so if you look at B Y so it's a completely different but it some the say and that's the uh a little that it puts some the same uh_huh hmmm oh well what what we wanna do this is that what simple we would also read produce using gonna use in must every all seven what one O any a lot of layout are also had also so that's why we want to get also the be or more uh this five one of these people bust right i oh oh no that directional audio coding and also and also the reverse and labeled on a a bit twice same so is it's only for sets choice say i well oh i oh is yeah i one i wow oh i you uh sweet spot of sweet spot is used for no i i it's of a goalie this it does make a big difference at least we didn't for a of any brought class but of course if you go away from the of three spot you are more easily would you to get a a a plus but we mainly due the since text this the sweet but there was really noise uh_huh uh_huh uh_huh hi i okay and this oh i i hmmm no uh we really did i don't see of course we could because we don't wanna at any room at that basically because we want go present but yeah of course yeah i don't know how do we really get it in it but yeah i uh_huh i did it in room which is a a point to this decide to use that that so it's list what there white nice the i we need some really brief test also in nine a will and that we didn't find a but was also that but the main main part of the test was done in really we okay know i yeah