Hi Everyone,
I've made a lot of progress working with LAME recently, adding a much
improved psycho acoustic model and an optional graphical frame
analyzer (screenshots on the web page). Mike Cheng has graciously
allowed me to release my enhanced version as LAME 3.0. A detailed
technical discussion of everything I've done is also on the web page.
I've also listed lots of questions about things I am not quite sure
how to implement. I believe this is the only open source encoder
which improves the quality of the ISO demonstration encoder.
Here is the "announcement". I'm sending this everywhere I can think
of - I'm interested to see if FhG thinks poorly of the open source,
dist10 patch distribution model!
Mark
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LAME 3.0 with GPSYCHO and MP3x
www.sulaco.org/mp3
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LAME (LAME Ain't an MP3 Encoder) is a patch for the ISO demonstration
source MP3 encoder which increases its speed by a factor of 5. New to
LAME 3.0 is a much improved psycho-acoustic model (GPSYCHO) and a
graphical frame analyzer (MP3x).
GPSYCHO is a GPL'd psycho-acoustic model for ISO MP3 based encoders.
GPSYCHO fixes some substantial bugs in the ISO psy-model, along with
adding joint stereo, pre-echo control and a better bit allocation
scheme. At 128kbs, the quality is significantly better than that
produced by ISO psy-model encoders (such as LAME 2.1, BladeEnc, 8hz-mp3,
CDEX), and closer to the quality of the reference FhG encoder.
GPSYCHO was developed with the help of MP3x, a GTK based X-window
graphical analyzer for .mp3 and .wav files. It shows input and
output pcm data (courtesy of mpg123), .mp3 frame header information
and MDCT spectrum. For .wav files, it will also show various
psycho-acoustical information coming from either the ISO psy-model or
GPSYCHO.
Note that the ISO demonstration source is freely available, but
any comercial use (including distributing free encoders) requires
a license agreement from FhG.
