立体声：音频流将编码为双声道立体声。
Stereo: The Audio stream will be encoded to 2-channel stereo.
本文设计的虚拟环绕立体声系统，将普通双声道音频信号经过数字信号处理器（DSP）处理，转变成具有环绕立体声效果的双声道音频信号。
The simulant surrounding stereo-system designed in this paper can convert the ordinary audio-signal to stereo audio-signal through the processing of Digital Signal Processor (DSP).
许多后制工作必须同时发行立体声及环绕声两种版本。例如，也许您要在网路上以双声道立体声播放串流视讯，并以5.1声场环绕声发行dvd。
For example, you may want to stream video on the web with two-channel stereo and release it on DVD with 5.1 surround.
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