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How many audio channels?

April 26, 2017audio channels

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How many audio channels?

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MPEG I allows for two audio channels. These can be either single(mono) dual (two mono channels), stereo or joint stereo (intensity stereo or m/s-stereo). In normal (l/r) stereo one channel carries the left audio signal and one channel carries the right audio signal. In m/s stereo one channel carries the sum signal (l+r) and the other the difference (l-r) signal. In intensity stereo the high frequency part of the signal (above 2kHz) is combined. The stereo image is preserved but only the temporal envelope is transmitted.In addition MPEG allows for pre-emphasis, copyright marks and original/copy marks. MPEG II allows for several channels in the same stream.