This paper describes the operation of the AC-3 multichannel adaptive transform coder. Coding a multiplicity of channels as a single entity is more efficient than coding individual channels, permitting a lower net data rate. The major processing blocks of the AC-3 coder are presented, along with the underlying psychoacoustic principles. Strengths and limitations of the coding techniques are cited.

Author: Davis, Mark
Affiliation: Dolby Laboratories Inc., San Francisco, CA
AES Convention: 95 (October 1993) Paper Number: 3774
Publication Date: October 1, 1993
Subject: Perceptual Coding

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