mirror of
https://github.com/cookiengineer/audacity
synced 2025-10-31 06:03:49 +01:00
95 lines
3.1 KiB
Plaintext
95 lines
3.1 KiB
Plaintext
TwoLAME
|
|
=======
|
|
|
|
Based on tooLAME by Michael Cheng
|
|
|
|
All changes to the ISO source are licensed under the LGPL
|
|
(see COPYING for details)
|
|
|
|
TwoLAME is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
TwoLAME is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with TwoLAME; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
|
|
|
|
INTRODUCTION
|
|
------------
|
|
|
|
TwoLAME is an optimized MPEG Audio Layer 2 (MP2) encoder.
|
|
It is based heavily on:
|
|
|
|
- tooLAME by Michael Cheng
|
|
- the ISO dist10 code
|
|
- improvement to algorithms as part of the LAME project (lame.sf.net)
|
|
- other contributors (see AUTHORS)
|
|
|
|
TwoLAME should be able to be used as a drop-in replacement for
|
|
LAME (a MPEG Layer 3 encoder). The frontend takes very similar
|
|
command line options to LAME, and the backend library has a very
|
|
similar API to LAME.
|
|
|
|
For the latest version of TwoLAME, visit the project homepage:
|
|
http://www.twolame.org/
|
|
|
|
|
|
MPEG Audio Layer 2 (MP2)
|
|
------------------------
|
|
(taken from Wikipedia article on MP2)
|
|
|
|
MP2 (sometimes incorrectly named Musicam) is a short form of MPEG Audio Layer II,
|
|
and it is also used as a file extension for files containing audio data of this
|
|
type. While it has largely been superseded by MP3 for PC and Internet applications,
|
|
it remains a dominant standard for audio broadcasting as part of the DAB digital
|
|
radio and DVB digital television standards. It is also used internally within the
|
|
radio industry, for example in NPR's PRSS Content Depot programming distribution
|
|
system.
|
|
|
|
|
|
INSTALLATION
|
|
------------
|
|
|
|
Standard automake process:
|
|
|
|
./configure
|
|
make
|
|
make install
|
|
|
|
|
|
|
|
REFERENCE PAPERS
|
|
----------------
|
|
|
|
(Specifically Layer II Papers)
|
|
|
|
Kumar, M & Zubair, M., A high performance software implementation of mpeg audio
|
|
encoder, 1996, ICASSP Conf Proceedings (I think)
|
|
|
|
Fischer, K.A., Calculation of the psychoacoustic simultaneous masked threshold
|
|
based on MPEG/Audio Encoder Model One, ICSI Technical Report, 1997
|
|
ftp://ftp.icsi.berkeley.edu/pub/real/kyrill/PsychoMpegOne.tar.Z
|
|
|
|
Hyen-O et al, New Implementation techniques of a real-time mpeg-2 audio encoding
|
|
system. p2287, ICASSP 99.
|
|
|
|
Imai, T., et al, MPEG-1 Audio real-time encoding system, IEEE Trans on Consumer
|
|
Electronics, v44, n3 1998. p888
|
|
|
|
Teh, D., et al, Efficient bit allocation algorithm for ISO/MPEG audio encoder,
|
|
Electronics Letters, v34, n8, p721
|
|
|
|
Murphy, C & Anandakumar, K, Real-time MPEG-1 audio coding and decoding on a DSP
|
|
Chip, IEEE Trans on Consumer Electronics, v43, n1, 1997 p40
|
|
|
|
Hans, M & Bhaskaran, V., A compliant MPEG-1 layer II audio decoder with 16-B
|
|
arithmetic operations, IEEE Signal Proc Letters v4 n5 1997 p121
|
|
|