Displaying 20 results from an estimated 600 matches similar to: "Lossy Audio Compression Research"
2002 Sep 09
1
psycho-acoustic model in ogg vorbis
I wonder what psycho-acoustic model is used in ogg vorbis.
Did they create their own model (this requires big listening tests) ?
Or is it something that was already there, like gpsycho ?
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2001 Sep 28
6
Vorbis for PlayStation
you can write your own software mixer that can decode MP3 on the PS2 so I
can't see why you can't do that with ogg, however, even mp3 is processor
intensive and programers are not going to give up that much processor power
which will decrease or detract from the rest of the game. However, I'm sure
there are some people out there that have been able to work around this.
Regardless, ps1
2006 Feb 20
4
test vectors for OggVorbis encoder
Hi,
We are working on Oggvorbis encoder porting on embedded platform. Where
can we find good test vectors (wav files) for testing OggVorbis encoder?
Does anybody have any idea.
Parul
Embedded Engineer
Einfochips Ltd
2001 Aug 14
2
16 KHz clip-off?
Hello,
congratulations to the Ogg Vorbis team - RC2 sounds good.
But... RC2 in 128 kbps mode seems to clip off all frequencys
beyond 16 KHz. On the tracks I tested Beta 4 gave response
even beyond 18 KHz.
Some testings on a randomly chosen track:
(other tracks gave similar results)
Artist: Judas Priest
Album: Jugulator
Title: Bullet Train
Beta4: 127 kbps, ~ 18 KHz (!)
RC2: 132 kbps (!), ~ 16
1999 Aug 25
1
Vorbis/Lame
Hi,
I think that it would be a good thing to know more about those 2 projects
(and also the future patent free format).
I think that many people as me know about Lame, but not about Vorbis, and
vice-versa.
It would be fine that someone (perhaps the maintainer) of every project
would introduce to both group of people those projects. 2 things would be
interesting (to my mind):
- to know about the
2002 Jan 06
1
German translation of OggEnc
Hello,
I translated OggEnc (RC3) into German language. Nothing fancy.
Neither Goethe nor Schiller.
Could anyone please make a Win32 build? I don“t have a
Win32 compiler.
Sourcecode of modified files is available at
http://www.metalunleashed.de/oggenc_ger.zip
Just replace RC3 files with the modified versions.
I hope this is useful for anyone.
bye,
Maik Merten
--
MetalUnleashed:
2001 Dec 19
2
New Winamp release
Hi,
<p>today, Winamp unaskedly notified me of a new release, v2.78. I checked
the what's-new-page on winamp.com (it does only mention a few fixes and
cddb2 support, not that I needed that) and downloaded the full install,
hoping that Ogg Vorbis support is finally included. D'oh, since I
installed it into the 2.77 install directory will all the plugins
already installed, I can't
2001 Aug 07
4
Some pre-RC1 listening tests
Hello everyone,
ff123 compiled Monty's branch of the RC1 encoder, see his post on
r3mix.net forum:
http://66.96.216.160/cgi-bin/YaBB.pl?board=c&action=display&num=994299736&start=30
Anyway it only supports ~128kbps mode, so I did a quick listening
test with some files that bugged vorbis beta4.
grace.wav - the right channel is still a bit watery, and I think this
can be seen
2002 Mar 19
3
Psycho-acoustics research
Hi.
I'm an undergraduate linguistics major and computer science minor at
the University of Colorado in Boulder, and am taking a couple classes
this semester which give me the opportunity to do a research project -
one on introductory acoustics in the physics department, and one in
the linguistics department on phonetics and phonology. I've got an
idea, but I'd like to hear from anyone
2001 Nov 03
3
Vorbis 1.0 before the end of the year?
Hi guys.
IMO now it's definitely time for finalizing Vorbis and throwing it
in the arena.
Two reasons:
- RC2 sounds wonderfully well, I'm really amazed how good it is..
and I personally think there's little room for further improvement in
sound quality..
- portable music devices are starting to take off (see Waitec, Creative,
Apple and many other vendors).
Wouldn't be good
2002 Jan 09
2
Removing Vorbis tags
Hello everyone,
Was wondering if there was an option or program somewhere that can delete all tags associated with an Ogg Vorbis file?
Ross Vandegrift
ross@willow.seitz.com
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2008 Jun 05
2
Nouveau on GeForce 7950GTX (NV49)
Hi everyone,
I just finished installing the current git of the nouveau driver for
my NV49 based 7950GTX. I attempted this because I've been continually
frustrated by the constantly degrading 2D performance of X under the
nvidia and nv drivers. Webpages that do any kind of compositing in
Mozilla will burn CPU all day long.
I'm happy to say that I'm writing because I didn't have
2002 Jan 18
1
Ogg and Vorbis questions
>From the top of vorbisfile.c:
/* A 'chained bitstream' is a Vorbis bitstream that contains more than
one logical bitstream arranged end to end (the only form of Ogg
multiplexing allowed in a Vorbis bitstream; grouping [parallel
multiplexing] is not allowed in Vorbis) */
Is this paragraph talking about multiple streams in a single Vorbis stream in an
Ogg, or is it talking
2002 Oct 01
1
An Analysis of the c't Codec Test
On Mon, Sep 30, 2002 at 10:48:27AM -0100, fungus wrote:
> One the one hand this is a great achievement but on the
> other hand normal people aren't going to figure out how
> good it is because they'll never push the limits.
> Who's going to set "quality 0.5" when they've got a
> range from zero up to ten.
This is very true. I can easily hear MP3
2003 Feb 11
1
Is there a set of test waves
Hi all,
Is there a standard set of wave files for testing the quality of the output
of oggenc?
Ronald
----------------------------------------------
Philips Research Laboratories -- Building WDC
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2001 Aug 13
6
RC2 release
RC2 has been officially released. Get all your vorbis goodness from
www.vorbis.com, along with release notes, and binary downloads for
windows and for linux/x86 (RPMs). Debian packages are in incoming.
Three cheers for the guys who did all the hard work here - Monty,
for writing the code, Greg Maxwell for being our release manager
for today, in Jack's absense. Also to Chad, for win32
2001 Aug 13
6
RC2 release
RC2 has been officially released. Get all your vorbis goodness from
www.vorbis.com, along with release notes, and binary downloads for
windows and for linux/x86 (RPMs). Debian packages are in incoming.
Three cheers for the guys who did all the hard work here - Monty,
for writing the code, Greg Maxwell for being our release manager
for today, in Jack's absense. Also to Chad, for win32
2001 May 30
3
Lossless/lossy hybrid?
Monkey's Audio lossless compressor (currently win32 only, free but not
open-source except decoder) author is thinking to implement a kind of
audiophile-quality lossy compression which would filter "noise bits" that
are hard to encode lossless but which are (or should be) inaudible and thus
improve lossless compression (avg. 300-450kbps). I think that implementing
something like this
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
2001 Dec 17
1
about the icecast mailing list
Hi,
<p>sorry for posting this here, but my mail would make things worse on the
icecast list. ;P
A mail daemon is spamming it because some subscribers mailbox is full.
Every bounced mail starts another notification by that stupid daemon.
I mailed tech_support@caisnet.com about the issue and got an automated
reply so far. At least my mail reached them. Let's hope they fix their