similar to: Huge VQ codebooks

We are implementing oggvorbis decoder on embedded system. In that we want to have support of chaining and grouping. If somebody can throw some light on how it can be implemented, it would be gr8 help. Regards, Parul -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/vorbis-dev/attachments/20060523/d90e36a0/attachment.htm

For testing the encoder i needed test vectors. thanks for the links send by members. Those links are useful, but contain test vectors corresponding to 44 KHz only. Does anybody has any idea where i can find test vectors of other sampling rates i.e. 48 KHz, 32 KHz, 16 KHz, 11 Khz, 8 KHz. ? Thanks, Parul Embedded engineer Einfochips

We are working on OggVorbis encoder. In the porting effort we are trying to convert it to fixed point code (both 32 and 24 bit fixed point). Now the issue is how we do the testing. What should be the criteria for our testing. Does anybody has any idea how compliance testing (i.e. some objective tests) is done at encoder side? What is the criteria of testing at the encoder side? If anybody

Hi, We are working on Oggvorbis encoder porting on embedded platform. Where can we find good test vectors (wav files) for testing OggVorbis encoder? Does anybody have any idea. Parul Embedded Engineer Einfochips Ltd

Hi, Have anybody worked on converting OggVorbis encoder floating point code to fixed point (32 bit or 24 bit). How do you handle _vp_noisemask in that case where precision goes upto 40 bits. Any help available? Parul Embedded Engineer Einfochips Ltd

Hi, Please brace yourselves for some possibly stupid questions. Why are there only 2 codebooks for floors and many more for residue values? What makes the encoding of floor values fundamentally different from encoding residue values? I have a basic understanding of VQ, and looking at the floor decode function, it all makes sense 1) Read the codebook index from the stream 2) Do a

Hello, Vorbis uses codebooks, for example to do vectorquantization and huffman-encoding. My question is - are all these codebook dynamicly generated ("trained") or are there also static codebooks used ? If yes, what specific tasks are these 2 types used for, during encoding ? Thanks Stoffke <p>--- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project

Hello, I'm trying to write a Vorbis decoder (just as a hobby) but I've got a problem with reading the setup header. According to the Vorbis documentation the first data that should be read after the initial 'vorbis' string is an eight bit integer which when incremented by one, contains the number of codebooks in the header. My problem is that whenever I read this number it seems

Hi, Am I correct in understanding that the codebooks are *not* adaptive during compression? I see that Packet #3 is written to the stream in the beginning of the encode process with no modification. If the codebooks are not adaptive, then why are codebooks included in the stream at all? Why not pass the mode type (A or B or C...) instead of all the mode info and let the decoder load it's

Hello to All Members of this Group, Can I get the Test Vectors in .wav format for different sampling rates in order to Test the Ogg Vorbis Encoder Code ? If possible Forward the Link where I can get effective testvectors to Test the Encoder. Please Reply As soon as possible . Thanks & Regards , Maulik Desai Embedded Engineer - Embedded Division eInfochips Ltd. Work:

Pardon my ignorance or laziness (as the case may turn out), but is there documentation or a script/Makefile somewhere that describes exactly how the current codebooks were produced? (I mean, the exact arguments, as opposed to "in general") Are the (exact) training data sets available somewhere? Thanks, --Mike -- [O]ne of the features of the Internet [...] is that small groups of

Hello, I'd like to know in detail how does the creation of VQ and Huffman codebooks work in Vorbis. I've used the source code from *encoder_example* as guide, but the only reference I've found is the function *_make_words *inside * vorbis_book_init_encode*, which creates the Huffman tree if I'm not wrong. So I have two doubts. The first is that, for creating the Huffman tree (and

hello, does anybody know whether the codewords have a special meaning? whether they have a different influence like the quantization matriy in jpeg? e.g. do lower or the first entries have a greater influence than the last or higher codewords? thanks gerald

I'm having trouble decoding the number of codebooks out of an ogg file, and was wondering if anyone here could lend a hand? I read in the sync pattern, and I think the codebook dimensions properly, but when I try and read in the number of codebook entries, I get a number larger than the number of bytes in the file, which I have to assume is wrong :) Anyway this is how I read in the numbers :

Hi, I have to create scenario like following, I have 2 sip soft phone.I configured Asterisk server on local network, on Linux.With two soft-phone , local asterisk sever, i able to communicate.Now i have communicate with other network SIP client.For that i have opened account at @sip2sip.info, they provided me credentials.Then i registered one SIP phone to local Asterisk sever and another to

Tony Rodriguez wrote: > I wanted to try improving the compression efficiency of libvorbis by > specifying a new metric used in generating the codebooks. Vorbis is history; Opus is the future. You might, instead, like to improve Opus. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/

Hi Did you abandon the project "mp3 workshop"? Thanks in advance -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/vorbis/attachments/20060827/b1fa265d/attachment.htm

On Mon, Jul 13, 2015 at 3:00 PM, Martin Leese wrote: > Vorbis is history; Opus is the future. You > might, instead, like to improve Opus. A lot of Open Source applications are currently using vorbis/libvorbis instead of opus. I don't see any signs of them being ported to opus. I'm working with several Open Source SDL2 programs now (updating, building, packaging, etc.) and they

The following has been committed to the Vorbis I spec as of r19445: Errata 20150226: Single entry codebooks A ?single-entry codebook? is a codebook with one active codeword entry. A single-entry codebook may be either a fully populated codebook with only one declared entry, or a sparse codebook with only one entry marked used. The Vorbis I spec provides no means to specify a codeword length of

---------- Forwarded message ---------- Date: Mon, 18 Dec 2000 15:50:05 -0500 (EST) From: Erik Kruus <kruus@on2.com> Reply-To: vorbis-dev@xiph.org To: vorbis-dev@xiph.org Subject: Re: [vorbis-dev] what script or command makes the codebooks? I've been through the entire vq table process during the last week. Some folks have already suffered through listening to .ogg files encoded with a