Dolby Digital is a worldwide audio coding standard, with applications that include digital television and home theater. Its underlying perceptual coding engine provides high quality multichannel audio at low bitrates, without requiring excessive computation complexity. It also supports a number of system features that improve the overal listening experience, such as volume normalization and dynamics processing. This paper presents an overview of Dolby Digital, focusing on the design elements that differentiate it from competing systems and that have contributed to its success.
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