For AC3 we have terms and definitions in 2 topics. The topics are Computer Technology and Home Theater.

AC3 (Computer Technology)

AC3 is a high-quality, low-complexity multichannel audio compression system proposed by the Dolby Laboratories. AC3 is also called Dolby Digital 5.1, the six channels are Left, Right, Center, Surround Left, Surround Right, Low Frequency Effects (<120Hz). The total encoded bit stream fits in 384Kbps.

AC3 (Home Theater)

Audio Codec 3. This was the original and more technical name for Dolby Digital. Replaced by marketing mavens when they realized that Dolby's name was not in the title. Some RF modulated, 5.1-encoded laser discs were labeled as AC3. Later versions were labeled as Dolby Digital.

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