search for: psycoacoustic

...ettings than higher (I doubt I would be able to hear any difference at all for 5 and above, while 0 through 3 were obvious step-ups). Also, if possible lower bitrates should degrade more gracefully. Gradually add high-frequencies, not in chunks. Does the bitrate limiting engine have any linkup with psycoacoustics? -- it doesn't sound like it, at least not for lower bitrates. I'd experiment with adding in harmonics of the highest frequency coded to fill in the high end; it may be better to have a wrong high-end than no high-end, psycoacoustically speaking. Note that the Vorbis internals have change...

...Finally I figured out that it was some of the high-range in a few spots that hit with less -- brillience is the word that comes to mind -- than the uncompressed. Yeah this is 128k so what should I really expect, and compressed against uncompressed so almost no fault at all found here, but could the psycoacoustic model be tuned any? Maybe if somebody could assemble a "test kit" that a lot of people could use and try to tune the model to what they thought sounded best, then the results could be averaged? Or do we have it on higher authority that the psycoacoustics are the best they could be? (I am...

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: http://lists.xiph.org/pipermail/o...

...the final modified file sounds quite similar to the original one, the decoded pcm wave samples are a little bit different (using a simple Euclidean distance measure, normalized by the number of pcm samples, the distance is about 0.05 between the original and the modified versions, may not be a good psycoacoustic distortion measure, but in this game I'm just interested in the pcm values). Finally, my doubt is: is this caused because there may not be a quantized residue value to exactly compensate the variation introduced in the corresponding floor value or am I misunderstanding something? Thank you. --...

Hi again. Since mostly stupid people gave me stupid answers last time, I will try again. MP3 and Ogg Vorbis use different models in order to remove most of the bits. What is the names of these models and how do they differ? <p><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

Hello I had an idea about judging the quality of ogg vorbis (or any other lossy codec) I took a wave-file and encoded it to ogg. Then decoded ogg to wav and inverted it's phase. When mixing the original wav with the phase-inverted decoded ogg-file, any identic parts of compressed and uncompressed audio should be eliminated. Of course there's always a "rest" of sound because