声音压缩库 Speex
openkk
13年前
<p><img alt="声音压缩库 Speex" src="https://simg.open-open.com/show/a5f01aa387b3659614f193839271ebd1.png" width="181" height="80" /></p> <p><span style="font-size:small;"><span><span lang="EN-US"><span style="font-family:Times New Roman;">Speex</span></span><span style="font-family:宋体;">是一套专门用于压缩声音的库</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">由于其专门针对声音</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">所以压缩声音的性能非常高</span><span lang="EN-US"><span style="font-family:Times New Roman;">.Speex</span></span><span style="font-family:宋体;">由于其压缩性能</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">及</span><span lang="EN-US"><span style="font-family:Times New Roman;">0.80</span></span><span style="font-family:宋体;">版后的跨平台的性能</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">所以在网络声音的传输中有很大的价值</span><span lang="EN-US"><span style="font-family:Times New Roman;">.</span></span><span style="font-family:宋体;">但是需要注意的是</span><span lang="EN-US"><span style="font-family:Times New Roman;">speex</span></span><span style="font-family:宋体;">只能对声音进行压缩</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">不支持音乐的压缩</span><span lang="EN-US"><span style="font-family:Times New Roman;">,</span></span><span style="font-family:宋体;">如果你需要音乐的压缩你或许需要用</span><span lang="EN-US"><span style="font-family:Times New Roman;">vorbis</span></span><span style="font-family:宋体;">库</span><span lang="EN-US"><span style="font-family:Times New Roman;">.</span></span></span></span></p> <span style="font-size:small;"><span style="color:#3366ff;"><span lang="EN-US"><span style="font-family:Times New Roman;">支持包括Linux、BSD、MacOS 以及 Symbian 系统。<br /> </span></span></span></span>以下是它的一些特性： <ul> <li>Narrowband (8 kHz), wideband (16 kHz), and ultra-wideband (32 kHz) compression in the same bitstream</li> <li>Intensity stereo encoding</li> <li>Packet loss concealment</li> <li title="Speex uses more bits for more difficult-to-encode audio, and less bits for less">Variable bitrate operation (VBR)</li> <li title="Speex can detect if someone is speaking or not, and adjust itself accordingly">Voice Activity Detection (VAD)</li> <li title="Speex can stop sending data if it thinks it’s okay (such as when there is no voice data)">Discontinuous Transmission (DTX)</li> <li>Fixed-point port</li> <li>Acoustic echo canceller</li> <li>Noise suppression</li> </ul> <br /> <span style="font-size:small;"><span><span lang="EN-US"><span style="font-family:Times New Roman;"> <p><strong>项目主页：</strong><a href="http://www.open-open.com/lib/view/home/1325062909718" target="_blank">http://www.open-open.com/lib/view/home/1325062909718</a></p> </span></span></span></span>