The ISO/MPEG/Audio Layer 3 digital audio compression scheme is the most powerful of the three audio compression algorithms standardized in ISO/MPEG IS-11172. Even at very low bit rates Layer 3 provides a high sound quality. This facilitates the transmission of high quality audio via standard 64 kbit/s data channels. Apart from the sound quality in MPEG audio, only Layer 3 offers additional features that allow very effective solutions for the synchronization of the sample clock to the transmission clock. This paper describes the basic features of Layer 3 as well as practical implementations.
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