Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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Dolby Digital is one of several audio compression technologies (codecs) produced by Dolby Laboratories. Dolby Digital (also called AC-3) is the most common version. It contains up to six discrete channels of sound. Five channels for normal-range speakers (right front, center, left front, right rear and left rear) and one LFE (Low Frequency Effects) channel for the subwoofer. This is often abbreviated as 5.1. The Dolby Digital format also supports mono and stereo usage.