search for: psychoacoustics

Good Morning; Iam asking whether any one have knowledge about is it possiple to incorporate a psycoacoustic model?(specifically?I mean ?MPEG-1 psychoacoustic model 1) into the CELT codec(any version even older versions of the coder,?no matter) Iam using version 0.3.2. Kind Regards; Osama. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hello, Tell me please where I can find detailed description of the Vorbis psychoacoustic model? <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is needed. Unsubscribe

Hi, I need a psychoacoustics model for some experiments and would like to use the one included in vorbis. Is there any documentation about how to use it? Looks like the relevent code is in psy.c, but I can't go further. Also I would like to know whether I can be of any help in vorbis. I have some knowledge in speech codin...

Hello everyone, I need to know which kind of psychoacoustic model is used in vorbis to encode signal. Thanks for answers __________________________________ Do you Yahoo!? New Yahoo! Photos - easier uploading and sharing. http://photos.yahoo.com/ --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a

Hello, I'd like to know there is any place (web, document...) where I can see which the vorbis' psychoacoustic model is, at least for the reference encoder (how it works, algorithms, filter banks, scalefactors, etc., or if it doesn't use any of this things at all...), or if the only way of looking at it is within the psy.c. I've been looking for it in the Vorbis' site and in

Hello! I don`t know C or C++, but I want to prepare some psychocuostic experiments in the MatLab. Shuold you tell me where I can find detailed description of the Vorbis psychoacoustic model? <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org'

...mental of signal > processing concepts. Go get an undergraduate level book on signal > processing (eg, _Understanding Signal Processing_ or _Signals and Systems_) > and read it. This is all covered first month. On this subject, could you (all) recommend some good vorbis-relevant dsp and psychoacoustics texts? There seem to be a lot out there to choose from. (For DSP, I own _A Digital Signal Processing Primer_ by Steiglitz, which seems like a good introduction and has some practical commentary. I also have _Digital Signal Processing: A Practical Approach_ by Ifeachor and Jervis. This is not as...

I've made a block diagram of the encoder because I tried to find out, how it works http://stoffke.freeshell.65535.net/ogg/block.html Although there are specifiation docs, that give very detailed information about single aspects of the encoding (or decoding) , I'm missing documenations that give a more general overview, about how the encoder works. (Vorbis Illuminated seems a bit

We've implemented a vorbis decoder based on Tremor and as part of the documentation we're also writing about psycho acoustic models and encoding. We're quite up to date with the decoding process and psycho acoustics in general but unfortunately not on the psycho acoustic encoding used in Vorbis. We have a few questions that would we would be very thankful to have answer to: Which

Hello everyone, I'm a student at the Universtiy of Delaware, and will be soon starting some research on the effects of lossy audio compression on speech sounds. I will be preforming test with both mp3 and vorbis. First of all, if I use the '--ogg' switch to lame, does lame use GPSYCHO to encode the wave, or some other psychoacoustic model (perhaps one designed for

I've made block diagram of the encoder because I tried to find out, how it works http://stoffke.freeshell.65535.net/ogg/block.html Although there are specifiation docs, that give very detailed information about single aspects of the encoding (or decoding) , I'm missing documenations that give a more general overview, about how the encoder works. (Vorbis Illuminated seems a bit outdated,

Hi Guys, 2012/7/20 juantello <juantello1234 at gmail.com>: > > Hello. > > Icecast client for android > http://droidtools.sourceforge.net/content/icecast-client-android > http://droidtools.sourceforge.net/content/libogglibvorbis-and-libshout-libraries-android I just finished compiling an android version of our reshaped shine encoder [1] there:

...ates (1:4 compression ratio), Vorbis or LAME, I would like to know how to compare the original audio and the decoded audio? With LAME, a simple sample-by-sample comparison failed badly (the error was as high as 7 bits). With ratio 1:4 I aim at archival quality and thus the overall error counts, not psychoacoustics. Best Regards, Juhana --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'vorbis-dev-request@xiph.org' containing only the word 'unsubscribe' in the body. No subject is need...

Hi all, I want to make a static database containing hundreds of thousands of very short audio files, each having not more than 100 milliseconds. These are made by splitting larger audio files into tiny pieces. I encode all the little files separately, but do not store 3 vorbis header packets, which are the same for all the files. I do not use ogg stream, only store plain vorbis packets.

Hi, In paper" A High-Quality Speech and Audio Codec With Less Than 10 ms Delay", you are mention that: There are still several ways to improve CELT, such as by incorporating better psychoacoustic masking in the dynamic bit allocation. This is a difficult problem both because there are few bits available for coding the allocation and because the analysis window is short. it is

Hello vorbis developer! I'm not very experienced in informatics, cause i'm only an audio engineer and sorry for my broken english but i have an idea... After the filterbank the maximum aplitude in each band decides about the nessesary bits, then the psychoacoustic model decides how much of the signal can be truncated without hearable noise. What do you think about quantising the

...promising places seemed to be just before floor1_fit, but it seems a bit odd: http://home.samfundet.no/~sesse/vorbis_floor3.png In particular, there's a _lot_ of energy in the treble, where I'd expect there to be almost none. I don't know very much about the internals of Vorbis (nor psychoacoustics in general, I'm afraid), but it seems to be as if the floor is a rough copy of the FFT _plus_ the tone masking stuff, whereas I'd probably want it to be a rough copy of the FFT _minus_ the tone masking stuff. Is there any way I can actually get out this kind of information, short of encodi...

Hi, I'm a newbie to audio compression. And I have several question about ogg. 1. How many bits a vorbis sample take ? does the sample size 16 bits ? like the mp3 ? CMIIW 2. How do a decoder recognize how many sample it takes in a second ? does it related with the code books ? 4. Does vorbis use VBR ? 3. What is function of the Windows ? and what is the output of the windows ? Thanks

...at, like it should be, from 0-20000 Hz. There are two 6dB dropout imperfections in the high end; I need to look at this flaw (you never know... maybe the r3mix guy was right after all and there *is* a masking bug ;-) Response is not perfectly flat (there's a half dB ripple or so) because the psychoacoustics say that's fine and the psychoacoustics are correct. Unlike most mp3 encoders, Vorbis totally trusts its psychoacoustics and because it's natively VBR, it won't try to use up 'extra' bits resulting in .000025 dB resolution on a very simple sample like this. The logsweep encode...

Hi, Does anyone have an idea about the possibility to apply psychoacoustic models as the ones in mp3 or AAC to a CELP coder? Thanks! /Pontus <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this list, send a message to 'speex-dev-request@xiph.org' containing only the word 'unsubscribe' in the