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What are the main differences between MPEG-1 and MPEG-2 in the audio part?

April 26, 2017audio differences main mpeg-1 MPEG-2

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What are the main differences between MPEG-1 and MPEG-2 in the audio part?

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MPEG-1 and MPEG-2 use the same family of audio codecs, Layer-1, -2 and -3. The new audio features of MPEG-2 are a “low sample rate extension” to address very low bitrate applications with limited bandwidth requirements (the new sampling frequencies are 16, 22.05 or 24 kHz, the bitrates extend down to 8 kbps), and a “multichannel extension” to address surround sound applications with up to 5 main audio channels (left, center, right, left surround, right surround) and optionally 1 extra “low frequency enhancement (LFE)” channel for subwoofer signals; in addition, a “multilingual extension” allows the inclusion of up to 7 more audio channels.