mirror of
https://github.com/cookiengineer/audacity
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124 lines
4.3 KiB
HTML
124 lines
4.3 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN"
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"http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="generator" content="AsciiDoc 7.1.2" />
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<link rel="stylesheet" href="./twolame.css" type="text/css" />
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<link rel="stylesheet" href="./twolame-quirks.css" type="text/css" />
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<title>TwoLAME</title>
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</head>
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<body>
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<div id="header">
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<h1>TwoLAME</h1>
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<span id="revision">version 0.3.11</span>
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</div>
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<div id="preamble">
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<div class="sectionbody">
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<p>Based on tooLAME by Michael Cheng</p>
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<p>All changes to the ISO source are licensed under the LGPL
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(see COPYING for details)</p>
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<div class="literalblock">
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<div class="content">
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<pre><tt>TwoLAME is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.</tt></pre>
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</div></div>
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<div class="literalblock">
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<div class="content">
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<pre><tt>TwoLAME is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.</tt></pre>
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</div></div>
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<div class="literalblock">
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<div class="content">
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<pre><tt>You should have received a copy of the GNU Lesser General Public
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License along with TwoLAME; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</tt></pre>
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</div></div>
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</div>
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</div>
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<h2>INTRODUCTION</h2>
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<div class="sectionbody">
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<p>TwoLAME is an optimized MPEG Audio Layer 2 (MP2) encoder.
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It is based heavily on:</p>
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<ul>
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<li>
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<p>
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tooLAME by Michael Cheng
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</p>
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</li>
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<li>
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<p>
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the ISO dist10 code
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</p>
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</li>
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<li>
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<p>
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improvement to algorithms as part of the LAME project (lame.sf.net)
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</p>
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</li>
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<li>
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<p>
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other contributors (see AUTHORS)
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</p>
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</li>
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</ul>
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<p>TwoLAME should be able to be used as a drop-in replacement for
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LAME (a MPEG Layer 3 encoder). The frontend takes very similar
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command line options to LAME, and the backend library has a very
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similar API to LAME.</p>
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<p>For the latest version of TwoLAME, visit the project homepage:
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http://www.twolame.org/</p>
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</div>
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<h2>MPEG Audio Layer 2 (MP2)</h2>
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<div class="sectionbody">
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<p>(taken from Wikipedia article on MP2)</p>
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<p>MP2 (sometimes incorrectly named Musicam) is a short form of MPEG Audio Layer II,
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and it is also used as a file extension for files containing audio data of this
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type. While it has largely been superseded by MP3 for PC and Internet applications,
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it remains a dominant standard for audio broadcasting as part of the DAB digital
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radio and DVB digital television standards. It is also used internally within the
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radio industry, for example in NPR's PRSS Content Depot programming distribution
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system.</p>
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</div>
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<h2>INSTALLATION</h2>
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<div class="sectionbody">
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<p>Standard automake process:</p>
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<div class="literalblock">
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<div class="content">
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<pre><tt>./configure
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make
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make install</tt></pre>
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</div></div>
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</div>
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<h2>REFERENCE PAPERS</h2>
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<div class="sectionbody">
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<p>(Specifically Layer II Papers)</p>
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<p>Kumar, M & Zubair, M., A high performance software implementation of mpeg audio
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encoder, 1996, ICASSP Conf Proceedings (I think)</p>
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<p>Fischer, K.A., Calculation of the psychoacoustic simultaneous masked threshold
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based on MPEG/Audio Encoder Model One, ICSI Technical Report, 1997
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ftp://ftp.icsi.berkeley.edu/pub/real/kyrill/PsychoMpegOne.tar.Z</p>
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<p>Hyen-O et al, New Implementation techniques of a real-time mpeg-2 audio encoding
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system. p2287, ICASSP 99.</p>
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<p>Imai, T., et al, MPEG-1 Audio real-time encoding system, IEEE Trans on Consumer
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Electronics, v44, n3 1998. p888</p>
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<p>Teh, D., et al, Efficient bit allocation algorithm for ISO/MPEG audio encoder,
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Electronics Letters, v34, n8, p721</p>
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<p>Murphy, C & Anandakumar, K, Real-time MPEG-1 audio coding and decoding on a DSP
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Chip, IEEE Trans on Consumer Electronics, v43, n1, 1997 p40</p>
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<p>Hans, M & Bhaskaran, V., A compliant MPEG-1 layer II audio decoder with 16-B
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arithmetic operations, IEEE Signal Proc Letters v4 n5 1997 p121</p>
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</div>
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<div id="footer">
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<div id="footer-text">
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Version 0.3.11<br />
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Last updated 09-Jan-2008 11:45:15 BST
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</div>
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</div>
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</body>
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</html>
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