dolby digital audio encoding started with the name AC-3 http://www.dolby.com/digital/ and http://www.dolby.com/tech/ac-3mult.html. It's not the same as AAC which was first specified as part of MPEG2 audio and is now, with some tools added, part of MPEG4 audio, too.
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dolby digital audio encoding started with the name AC-3 http://www.dolby.com/digital/ and .
http://www.dolby.com/tech/ac-3mult.html
It's not the same as AAC which was first specified as part of MPEG2 audio and is now, with some tools added, part of MPEG4 audio, too.