similar to: Bitstream encoded huffman tables always the same

Good day! I'm creating HDL IP CORE (for using in FPGA) for theora encoder (now only I-frames). I don't undestand one moment. Now i develop such stages: 1. From RBG(byer) to YCbCr converter 2. DCT processing (8x8 pixels blocks) 3. Quantizator of DCT coeff. 4. Zig-Zag of quantized DCT coeff. and now i have uresolved last stage of compression - how i must send 8x8 blocks to huffman

Which procedure/function or structure returns finally formed binary stream? I see lib/tokenize.c and lib/encode.c. But it is too hard to understand novice. Theora algorithm differ in coding with JPEG: http://www.pcs-ip.eu/index.php/main/edu/8 Which function/structure returns stream like this: 100000100011001101101101111101011111111010110011010

-------------- next part -------------- An embedded message was scrubbed... From: "Timothy B. Terriberry" <tterribe@vt.edu> Subject: Re: [Theora-dev] Question about Huffman Tables in Setup Header Date: Fri, 17 Sep 2004 03:43:43 -0400 Size: 3441 Url: http://lists.xiph.org/pipermail/theora-dev/attachments/20040917/99108ff9/Theora-devQuestionaboutHuffmanTablesinSetupHeader.mht

Hello ! A question to all 'Wheel-reinventers': I can build the huffmantrees by hand (on paper) but how to code it? Are there any good URLs out there? Or does the spec supply sufficient information? I tried figure out how oggdec (debugging) does this, but I couldn't get the clou. Thank you Dominik --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project

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

There is bit space in Bitstream Header to put Huffman codes in. However, This space can take only 80 kinds of Huffman code set. And This space is divded into DC Huffman code set and AC Huffman set, and There are only 16 choices in each DC and AC Huffman code set. If we want to use this space, we find out best(or proper) performance 80 frequency counts(Huffman code sets) from tens thousands of

I want to analyse compressed data between VQ and Huffman coding steps. Where in source code can I access to data massive for this goal. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/vorbis/attachments/20090916/4529e42d/attachment-0001.htm

Hello, I was wondering if it is possible to change the huffman stuff? A different mapping maybe, or maybe it is not too late to change? Decoding is much more efficient if: -- the huffman tree is left-aligned (i.e., longer codes more to the left) -- and we get the bits msb, not lsb Oh, and I need some clarification about the lsp: the purpose of the lsp is to find a low-bitcount approximation of

Akos Maroy <darkeye@tyrell.hu> said: > Jack Moffitt wrote: > > Icast at one point had about 456 stations or so. We were able to do > > this (all the music was preencoded) with 8 machines quite reliably. > > Basically 4 machines sourced streams, and 4 machines served them. Only > > but the source machines: did they encode live audio, or send static > files

> As a guess, how many IceCast streams could be supported on one Linux PC > (say 1.5Ghz PC). Icast at one point had about 456 stations or so. We were able to do this (all the music was preencoded) with 8 machines quite reliably. Basically 4 machines sourced streams, and 4 machines served them. Only three machines were really needed, so failures were taken care of if only one machine

Jonny Daenen a ?crit : > Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) > compression in the same bitstream > > What is the meaning of this? can i find more information about this > somewhere? > > And what is packel loss concealment, an you enable this somewhere? What are you expecting exactly here? That I explain what's a Hertz and what's a

Dear experts, I am trying to understand the structure of the Speex .spx file, so I can packetize each frame in one packet for example, and in the receiving end, I can decode a file that has all the received frames (some of them may lost). I tried to figure out what is the delimiter used to separate the frames but I could not so far. I also tried to deleted some data from the .spx file or change

On Tue, Nov 4, 2008 at 12:56 AM, David Flynn <davidf+nntp at woaf.net> wrote: > Quite a while ago, the specification was modified to change the > way the nondefault scan format was signalled; this patch fixes that. Thanks for the patch. I've tried to fix things as discussed on irc. Please review r3762. Index: /liboggz/trunk/src/liboggz/dirac.c

Hello, could somenone please describe me the vorbis specific physical bitstream structure, as I haven't found any documentation about it. Thank you ******************* Pierre-Henri Quelen phq@laposte.net "Accédez au courrier électronique de La Poste : www.laposte.net ; 3615 LAPOSTENET (0,13 €/mn) ; tél : 08 92 68 13 50 (0,34€/mn)" --- >8 ---- List archives:

I'm having trouble getting libvorbis to cut the beginning of a bitstream when I instruct it to do so with granulepos. I have constructed a file which I believe should have its beginning truncated. I have attached it to this mail. Here is a picture of what the bitstream looks like, as output by a python program that uses pyogg/pyvorbis to read the stream and print a representation:

question for the crowd: In writing the bitstream spec, I need to decide how to name various fields. I can go with names equivalent or very similar to the existing C code, or I can go with a similar set of labels that are more intuitive. Many of the C variables are named in cryptic or confusing ways. Presently, I'm changing the names to be more descriptive whenever it seems to make sense,

Hi, I checked out the Theora source code for the first time as I figured that's the only way the Theora quirks will get documented (and subsequently re-implemented in libavcodec). I see that most of the code cribs the original VP3 source code, including the misspelled comments. Moving right along, I can't reconcile the way bits are packed in the stream. In VP3, the first byte of an

why store multibyte values as little endinan? wouldn't it make a lot more sense to use network byte order? (big-endian, most significant byte 1st)?? --- >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

On Saturday, 04 May 2002 at 17:52, Wade Carroll wrote: > This one really has me stumped. > I'm running 866MHz, 256MB RAM, 80GB Disk (7200RPM) on Linux-mandrake 8.2 > icecast 1.3.12 & ices 0.2.3 & lame 3.91 > all mp3s encoded with lame 3.91 or higher and --r3mix (VBR) ices behaves unpredictably in the face of VBR mp3s. It's on the TODO list, but I've never had the

This release bundles up the last twelve years worth of build system improvements, including making the configure script more efficient. Alan Coopersmith (9): configure: Drop AM_MAINTAINER_MODE autogen.sh: Honor NOCONFIGURE=1 Update README for gitlab migration Update configure.ac bug URL for gitlab migration gitlab CI: add a basic build test Build xz tarballs