similar to: what script or command makes the codebooks?

---------- 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

unemployed like you ex-icast folks :) (half the company was axed) Erik. --- >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 needed. Unsubscribe messages sent to the list will be

alpha. (that about sums it up) Will encode and play back via an sdp file and multicast on one computer (over the net if you transfer the sdp file over by hand). rc/rtenc3 and src/rtdec3 are in the style of encoder/decoder_example ...so this means you MUST edit it them to suit your system. For example, I specify my rtenc3 to multicast just on eth1 (to avoid pissing off my cable supplier on

I'm a french programmer and i'm very interested in the ogg/vorbis project. But before all, i need a good signal theory tutorial about audio/video. Who has a good set of URLs ? I'm currently analysing the ogg file format, and i could add a 'text streaming' capabilities (a new codec!) and 'jpeg streaming' (one more new codec!, just to create multimedia slide shows).

Hello! First of all a question: When you make the encoder tables (ie: mode_e.h) do you use the mapping0_forward function? Because you made the encoder tables, and after this you did a minor correction in the final beta4 ... (this correction was: additional[0]=fabs(additional[0]*scale); in the mapping0_forward function) (I see this was a bug, and the modification was correct, but this correction

Can anyone give me a brief explanation in filling the vorbis_info struct? I need to play around with higher/lower nominal kbps, 1/2 channels and different sample rates..... but donno what other value need to be change (ie modes, maps, times, floors......... ). Thanks Ray --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/

I'm trying to understand the residuevqtrain program, and I have some questions for Monty, Erik, or anyone that understands how it's supposed to work. I captured TRAIN_RES data from an encoding of a single track (about 4:43), producing two files, residue_0.vqd (3727 lines, = 3727 points?) and residue_1.vqd (huge). I then did a run with the parameters from the usage message

Hi, Does anybody know how codebooks are generated in OggVorbis encoder? We are porting oggorbis encoder on embedded platform for which VQ codebook memory is hugeeee to imagine. How can we reduce that? Can we do VQ with less codebooks and if yes how? If any help available? Parul Embedded Engineer Einfochips Ltd

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2000-07-19 at 11:06 Monty wrote: >I'll have to give things a look later/tomorrow to make sure nothing >'bad' (tm) crept in. I know, for example, that the books involved >are likely not exactly what I wanted to be using, but should be OK. >Specifically, the lsp12 and 30 codebooks are gigantic and the mode >description

I notice that the user is not able to set their own CFLAGS or LDFLAGS in the ao, ogg, vorbis, and voribs-tools projects. Is there a reason for this? I understand the fact that these modules want to set extremely high optimization flags, and that most users won't know what these are offhand, but there are times when it is useful for the user to specify their own CFLAGS/LDFLAGS. For example,

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

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

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

I've noticed that throughout the code there's quite a variety of formatting styles, especially the size of TAB characters (4 or 8) and size of indents (2 or 4). Is there any agreed standard for new code now? Oh, and whoever wrote the ogg code must get an electric shock every time he hits the spacebar. It's full of spaceless lines like

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 was wondering whether anyone had any perl or other scripts to reorganize the .m files as vq datasets? I cant' be the first one doing this. erik. --- >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'

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

Hello to everyone on the list, This is my first message sent to the list so bare with me on this one :) I've started learning C++ of September of last year in school. I think I'm fairly competent(I Hope :) at it and we were recently discussing bloatware in class. Vorbis seems so large and complex that I offen get intimidated, so I was wondering if anyone else would like to