1159b3361Sopenharmony_ci<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 2159b3361Sopenharmony_ci "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3159b3361Sopenharmony_ci<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> 4159b3361Sopenharmony_ci <head> 5159b3361Sopenharmony_ci <meta name="generator" content="PSPad editor, www.pspad.com" /> 6159b3361Sopenharmony_ci <meta http-equiv="content-type" content="text/html; charset=UTF-8" /> 7159b3361Sopenharmony_ci <link rel="stylesheet" type="text/css" href="styles/lame.css" /> 8159b3361Sopenharmony_ci <title>About the LAME encoder</title> 9159b3361Sopenharmony_ci </head> 10159b3361Sopenharmony_ci <body> 11159b3361Sopenharmony_ci<div id="menu"> 12159b3361Sopenharmony_ci <ul> 13159b3361Sopenharmony_ci <li><a href="index.html">Index page</a></li> 14159b3361Sopenharmony_ci <li><a href="about.html">About LAME</a></li> 15159b3361Sopenharmony_ci <li><a href="introduction.html">Intro to encoding</a></li> 16159b3361Sopenharmony_ci <li><a href="usage.html">Usage of LAME</a></li> 17159b3361Sopenharmony_ci <li><a href="history.html">Version history</a></li> 18159b3361Sopenharmony_ci <li><a href="contributors.html">Coders of LAME</a></li> 19159b3361Sopenharmony_ci <li><a href="contact.html">Contact LAME</a></li> 20159b3361Sopenharmony_ci <li><a style="border: 0" href="links.html">LAME links</a></li> 21159b3361Sopenharmony_ci </ul> 22159b3361Sopenharmony_ci</div> 23159b3361Sopenharmony_ci<div id="container"> 24159b3361Sopenharmony_ci<div id="content"> 25159b3361Sopenharmony_ci <div align="center"> 26159b3361Sopenharmony_ci <img src="images/logo.gif" width="358" height="231" alt="LAME Official Logo" /> 27159b3361Sopenharmony_ci <h2 class="hilight">About LAME</h2> 28159b3361Sopenharmony_ci </div> 29159b3361Sopenharmony_ci <p> 30159b3361Sopenharmony_ci LAME development started around mid-1998. Mike Cheng started it as a patch 31159b3361Sopenharmony_ci against the 8hz-MP3 encoder sources. After some quality concerns raised by 32159b3361Sopenharmony_ci others, he decided to start from scratch based on the dist10 sources. His 33159b3361Sopenharmony_ci goal was only to speed up the dist10 sources, and leave its quality untouched. 34159b3361Sopenharmony_ci That branch (a patch against the reference sources) became Lame 2.0, and not 35159b3361Sopenharmony_ci until Lame 3.81 (May 2000) the latest remainings of dist10 code were removed, 36159b3361Sopenharmony_ci making LAME no more only a patch. 37159b3361Sopenharmony_ci </p> 38159b3361Sopenharmony_ci <p> 39159b3361Sopenharmony_ci The project quickly became a team project. Mike Cheng eventually left 40159b3361Sopenharmony_ci leadership and started working on tooLame, an MP2 encoder. Mark Taylor became 41159b3361Sopenharmony_ci leader and started pursuing increased quality in addition to better speed. He 42159b3361Sopenharmony_ci can be considered the initiator of the LAME project in its current form. He 43159b3361Sopenharmony_ci released version 3.0 featuring gpsycho, a new psychoacoustic model he 44159b3361Sopenharmony_ci developed. 45159b3361Sopenharmony_ci </p> 46159b3361Sopenharmony_ci <p> 47159b3361Sopenharmony_ci In early 2003 Mark left project leadership, and since then the project has 48159b3361Sopenharmony_ci been lead through the cooperation of the active developers (currently 4 49159b3361Sopenharmony_ci individuals). 50159b3361Sopenharmony_ci </p> 51159b3361Sopenharmony_ci <p> 52159b3361Sopenharmony_ci Today, LAME is considered the best MP3 encoder at mid-high bitrates and at 53159b3361Sopenharmony_ci VBR<a href="#note1"><sup>1</sup></a>, mostly thanks to the dedicated work of its developers and the open 54159b3361Sopenharmony_ci source licensing model that allowed the project to tap into engineering 55159b3361Sopenharmony_ci resources from all around the world. Both quality and speed improvements are 56159b3361Sopenharmony_ci still happening, probably making LAME the only MP3 encoder still being 57159b3361Sopenharmony_ci actively developed. 58159b3361Sopenharmony_ci </p> 59159b3361Sopenharmony_ci <h3>LAME features:</h3> 60159b3361Sopenharmony_ci <ul> 61159b3361Sopenharmony_ci <li> 62159b3361Sopenharmony_ci Supports MPEG1, MPEG2 and MPEG2.5<a href="#note2"><sup>2</sup></a> layer III encoding. 63159b3361Sopenharmony_ci </li> 64159b3361Sopenharmony_ci <li> 65159b3361Sopenharmony_ci Encodes in CBR (constant bitrate) and in two types of variable bitrate, VBR and ABR<a 66159b3361Sopenharmony_ci href="#note3"><sup>3</sup></a>, as well as freeformat. 67159b3361Sopenharmony_ci </li> 68159b3361Sopenharmony_ci <li> 69159b3361Sopenharmony_ci Supports mono and stereo signals. Stereo signals are encoded by default with 70159b3361Sopenharmony_ci an advanced algorithm<a href="#note4"><sup>4</sup></a> to maximize the quality. 71159b3361Sopenharmony_ci </li> 72159b3361Sopenharmony_ci <li> 73159b3361Sopenharmony_ci Tuned default parameters for optimum encoding. 74159b3361Sopenharmony_ci </li> 75159b3361Sopenharmony_ci <li> 76159b3361Sopenharmony_ci Fast. Encodes to -V 2 at 17 times realtime on a P4 2.8Ghz. 77159b3361Sopenharmony_ci </li> 78159b3361Sopenharmony_ci <li> 79159b3361Sopenharmony_ci Uses an advanced psycho acoustic and noise shaping model improved during years. 80159b3361Sopenharmony_ci </li> 81159b3361Sopenharmony_ci <li> 82159b3361Sopenharmony_ci Developed under the <a href="http://www.gnu.org/licenses/lgpl.html">LGPL</a> 83159b3361Sopenharmony_ci GNU license 84159b3361Sopenharmony_ci </li> 85159b3361Sopenharmony_ci </ul> 86159b3361Sopenharmony_ci <div id="notes"> 87159b3361Sopenharmony_ci <ol> 88159b3361Sopenharmony_ci <li><a name="note1"></a> See the results of <a href="http://listening-tests.hydrogenaudio.org/sebastian/"> 89159b3361Sopenharmony_ci several blind tests</a> conducted by hydrogenaudio members. 90159b3361Sopenharmony_ci </li> 91159b3361Sopenharmony_ci <li><a name="note2"></a> MPEG1 sample rates are 32Khz, 44.1Khz and 48Khz. 92159b3361Sopenharmony_ci <br/> 93159b3361Sopenharmony_ci MPEG2 sample rates are 16Khz, 22.05Khz and 24Khz. 94159b3361Sopenharmony_ci <br/> 95159b3361Sopenharmony_ci MPEG 2.5 does not exist as a standard. It is an extension from 96159b3361Sopenharmony_ci <a href="http://www.fraunhofer.de/">fraunhofer</a> that added the possibility 97159b3361Sopenharmony_ci to encode in 8Khz, 11,025Khz and 12Khz. 98159b3361Sopenharmony_ci </li> 99159b3361Sopenharmony_ci <li><a name="note3"></a> See <a href="vbr.html">Variable Bit Rate</a> and 100159b3361Sopenharmony_ci <a href="abr.html">Average Bit Rate (ABR)</a>. 101159b3361Sopenharmony_ci </li> 102159b3361Sopenharmony_ci <li><a name="note4"></a> The stereo encoding of LAME automatically switches between 103159b3361Sopenharmony_ci Mid-Side and simple-stereo to maximize the available bits while preserving the 104159b3361Sopenharmony_ci quality. More info in <a href="ms_stereo.html">Mid/Side Stereo</a> 105159b3361Sopenharmony_ci </li> 106159b3361Sopenharmony_ci </ol> 107159b3361Sopenharmony_ci </div> 108159b3361Sopenharmony_ci</div> 109159b3361Sopenharmony_ci<div id="footer"> 110159b3361Sopenharmony_ci 111159b3361Sopenharmony_ci<a href="http://sourceforge.net/projects/lame"><img src="images/sflogo.gif" 112159b3361Sopenharmony_ci alt="Get LAME (Lame Aint an MP3 Encoder) at SourceForge.net. 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