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1.2 Features
• Automatic algorithm, data rate and sample rate selection
• Dolby AC-3 audio coding algorithm from 40 kbps - 384 kbps
• Mono, Dual-Mono or Stereo modes for AC-3
• Dolby AC-2 audio coding algorithm from 128 kbps - 384 kbps
• Mono 2-channel modes for AC-2
• Analog outputs with 20-bit D/A converters
• Digital outputs (AES/EBU and S/PDIF)
• Software download capability for software upgrades
• Selectable auxiliary data rates (0 - 9600 baud).
• RS-232 and RS-422 serial interfaces allows Control, Status, Software
Download and Auxiliary data.
• Built-in test tone generator
1.3 Dolby AC-3 and AC-2
Despite the low, spectrum-efficient data rate, Dolby AC-3 and AC-2 yield very high
audio quality and is suitable for the most demanding of professional and consumer
distribution applications. First demonstrated to the film industry in May of 1991,
Dolby AC-3 audio coding technology has evolved into a very sophisticated and
flexible system for the digital representation of high quality sound. Dual channel
implementations of the AC-3 algorithm can be user-configured to operate in Dual
Mono or Stereo modes.
AC-3 and AC-2 are compatible with Dolby Matrix Surround decoding. A wide
range of bit rates and audio coding modes are supported with this audio coding
technique, and are summarized in the tables on the following page.
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