Displaying 6 results from an estimated 6 matches for "psycoacoustics".
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psychoacoustics
2002 Jan 01
2
Just to dispel any hopes -- RC3 really low bitrate
...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 changed...
2000 Sep 13
3
end-user mode for a moment (side-by-side tests)
...lt 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 reminded
of Linus Torvalds' announcement for 2.4.0-test2 on l-k back when I was
subscribed.)
Wow. Not bad.
Now gotta try against MP3. Dang, does that mean I have to grab notlame or
bladeenc? Darn... I didn't even install them when I reinstalled last,
beca...
2011 Apr 25
3
Possibility of Incorporating a psychoacoustic model in CELT
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.
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2009 Sep 16
0
How floor1 modifications may affect final (de)coded samples?
Hello,
I've been "playing" a little with the floor1 encoding, and my game has posed
me a question. I've been modifying (just curiosity) manually, and randomly
(not too great modifications), the quantized [floor1_Y] values, just before
coding them with the codebooks. As, if I'm not wrong, the [floor1_Y]
obtained are then removed to get the residue vectors for each channel, I
2003 Mar 02
1
Models used in mp3 and Ogg Vorbis?
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?
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2003 Jan 24
8
just an idea about quality evaluation
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