Audio Lossless Coding

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MPEG-4 Audio Lossless Coding, also known as MPEG-4 ALS, is an extension to the MPEG-4 audio standard to allow lossless audio compression. The extension was finalized in December 2005.

MPEG-4 ALS is similar to FLAC in its operation. Simply put it is a quantized LPC predictor with a losslessly coded residual using Golomb Rice Coding or Block Gilbert Moore Coding (BGMC).

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