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Topic: Audio codecs.
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Robert Minichino
Master Film Handler
Posts: 350
From: Haskell, NJ, USA
Registered: Dec 2005
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posted 02-23-2006 07:05 AM
The "PASC" compression used in the DCC (Digital Compact Cassette) was essentially MPEG-1 Layer 1 audio at 384 kb/s.
I believe Dolby AC-1 was a non-perceptual ADPCM encoder. Here's what Dolby has to say on it:
quote: The first Dolby digital coding system, Dolby AC-1, was introduced in 1984. It was adopted beginning in 1985 in a number of direct satellite broadcast and cable distribution systems. Encoding units are manufactured by Dolby Laboratories, while the decoder is licensed. Dolby AC-2, a more sophisticated system providing full professional quality audio, was introduced in 1989. It has since become particularly popular with music recording and film studios for interconnecting widely separated facilities via economical ISDN lines for remote monitoring, dubbing, and other applications. Dolby AC-3, now known simply as Dolby Digital, was introduced in 1992; it was developed specifically for multichannel applications, including film sound and digital surround sound in the home.
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