A voice compression algorithm defined in ITU-T G.729, ACELP improves on CELP through the algebraic expression, rather than the numeric description, of each entry in the codebook. ACELP yields quality that is considered to be as good as ADPCM, but requiring bandwidth of only 8 kbps, which yields a compression ratio of 8:1. CS-ACELP is geared toward multi-channel operation. See also ADPCM, algorithm, bandwidth, CELP, channel, compression, CS-ACELP, ITU-T, and LD-CELP.
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