similar to: Tarkin video codec?

I've been reading up on wavelet transforms the past week, and I plan to start on some video compression stuff next week, if it's any good (small chance :)) for Tarkin. So far I think I know what's happening, however there's one small thing I don't quite understand yet. If I understand correctly, you can do a 2d wavelet transform (I'm assuming a Haar transform here for

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

For all the curious: http://www.vorbis.com/~jack/tarkin-experimental.tar.gz ome instructions: tar xzvf tarkin-experimental.tar.gz cd tarkin make ./tarkin 95 ./tarkinplayer output.tark You'll need SDL and SDL-devel if you don't already have them. jack. --- >8 ---- List archives: http://www.xiph.org/archives/ Ogg project homepage: http://www.xiph.org/ogg/ To unsubscribe from this

Smack my curiosity, but I encoded some songs in Vorbis mode 2 and tried to be able to distinguish the difference between that and the uncompressed WAVs. (*smacks self*) but here's what I noted: It's actually kind of hard to tell the difference :) (and I consider myself to have a decent set of ears, though not anywhere near the best) I got my accuracy to about 90%, but I couldn't

hi; i'm a lurker & trying to make sense of the discussion... is there a glossary of terms available somewhere? mdct, wavelets, 4th dimensions & preechoes remind me of my time in the twilight zone;) thanks peter --- >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

Kenneth Arnold (ken@arnoldnet.net) wrote : > On Mon, Oct 09, 2000 at 02:46:57PM -0700, Ralph Giles wrote: > > Re minimal facilities, all the compressed stream can really do is provide > > timestamps (or ranges). It's easy enough to keep track of exactly where > > you are in the decoder (libvorbis provides sample-accurate seeking, for > > example). What about

I tested Vorbis encoder - beta3 version, and here are my thoughts: - In comparison to beta2, subtle high-frequency artifacts seem to be gone (though they were small in beta2). Good job there! :-) - Velvet.wav also sounds better, but transparent quality is reached at -b256+. - Horn.wav still sounds very sucky, mode -b256 gives ~100kbps (this is understandable because in this sample practically

<WARNING: Long message ahead> Well, I have actually done something the past 1 1/2 week. I've created a program that runs several filters over an image to extract edge information. Currently it loads any uncompressed grayscale TGA file, and spits out another uncompressed greyscale TGA file that is 255 at places where there are edges, and 0 where there are not. I managed to get out quite

Hi, I'm interested in helping out with the Vorbis and Tarkin projects (in my already limited time!). I don't have an extensive background in all of the mathematics involved, but it looks like my mathematics from undergrad Physics is good enough to get a grasp on it. In the past few days I've started doing some reading on the mathematical basics. As part of my reading, I found

I know this probably transcends the scope of the current aims of Ogg video, but one thing I'd consider extremely useful is a lossless video compressor. There are a few of them out there (e.g. PICVideo's lossless wavelet codec) but I've found no free ones so far. The primary use would be for storage of video clips that would be too cumbersome to store as raw frames but still require

Following a post on vqf.com forum, I found out that some company called Adapted Wave Technology is ready to release its audio codec based on wavelets. They say that this wavelet-based codec is superior to MDCT codecs by 30-50%. One sentence caught my attention: "Adapted Wave Technologies holds exclusive patent rights for applying wavelet packets to audio applications." - sounds like a

Hello, Is is a great pleasure to post on a Xiph IRC Channel.I contacted you to have your advice and comment about wavelets for image/video compression, as I have made a wavelet-based image compression codec. I know that currently the best image/video compression codecs use the DCT block-based transform, like JPEG, Ogg Theora and the recent Google WebP, for example, but what would you think of

Hi everybody, I wrote last time some code to do video compression using a 3d integer wavelet transform. Since it uses a reversible lifting scheme and avoids a lot of floating point operations compared to Jacks initial Tarkin code, this should be somewhat faster and allow lossy+lossless compression. The current implementation is very experimental, but nevertheless I would be happy if some of you

Dear R Users, For running wavelet functions using dwt( ), modwt( ), and mra( ), a wavelet filter algorithm is applied. For all these functions, default is "la8" and other possibility is "haar". In related documents, another possibilities like as symlet and coiflet ... are not cited. Besides "la8" and "haar", which wavelet filters can be used? Thank

Dear all, Using R function "dwt", it seems that I cannot specify the wavelet transformation like Haar. What's the R code for wavelet decomposition which allows me to specify Haar wavelet transformation? Of course, if it can include "db2", that is even better. In general, I want an R function like matlab code "dwt". Thanks in advance! Zhen Li

I was wondering about Vorbis compatibility. It seems that wavelets and joint-stereo could be introduced later on Vorbis. I know the specifications are now frozen, but there is no real spec docs yet. So will the vorbis players still be able to decode Vorbis once joint or wavelet will be introduced, or will they need to be updated? Regards, -- Gabriel Bouvigne - France bouvigne@mp3-tech.org

Dear, I am using WaveTresh for Haar Wavelets. It works all fine exept when I want to adjust the axis on the wavelet coefficient plot: input: wlh_ponds<-wd(input_waves[,1], family="DaubExPhase",filter.number=1) plot: plot(wlh_ponds,scaling="by.level") My problem is twofold= -I want the original x-axis of the data on that plot, not 1/2 of the axis. This would make

Hey everyone. I've been designing my own audio codec with extremely strict decode-performance constraints (including a fixed block size), which led me to attempting a number of unorthodox things to squeeze as much quality as possible. One surprising thing I discovered just earlier today was an extremely cheap method of reducing pre-echo during transients, without using short blocks (and

Hi!! I'm looking for a package in R for time series analysis using wavelets( I'm interested on extractingt information from electrocardiograms with the aim of study the heart rate variability) so i want to know which package is the best for me. I've thinking about using some of those(you can recommend me others,xD): *wavelets: A package of funtions for computing wavelet filters,

Hi everyone, first of all, I searched through the archives for any posts resembling this, I didn't read all posts about the patents so if this has been suggested before I apologise. I read in an article on C|Net (I think, it was linked from Slashdot anyway) that Thompson are threatening to sue you if Ogg Vorbis becomes a success. Which is evil, and I'm also mad at them because they never