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The Audio Codec specification released in 1997 [AC '97] defines the
Architecture and Digital Interface, specifically designed for
implementing audio and modem I/O functionality in Personal Computers.
Companion specifications include the Modem Codec [MC '97], and the
combined Audio/Modem Codec standard [AMC '97]. The current version of AC
'97 was produced in 2002. The specification is produced by Intel. The
AC-97 specification defines a recommended 48-pin QFP IC package. Of
course, with an IC package, the pinout follows. AC'97 defines the Electrical interface [levels and timing], the Physical interface, the serial interface protocol. A 16-bit full-duplex stereo codec is defined in a 48-pin QFP package. A MIC input line is defined. Both a main stereo output line [LINE-OUT], and a secondary stereo output line [AUX-OUT] are defined. An optional digital S/PDIF output is also specified. A few supported configurations; 5.1 channel digital is supported via the SPDIF out line, 4 channel surround, discrete 4 channel, stereo audio, and headset audio. There is also a Digital Controller specification, referred to as DC'97 | |
A new audio implementation has been released by Intel called High Definition Audio [HD Audio]. This specification is not backwards compatible with the older AC97 standard. A description of HD Audio is located on the High Definition Audio page.
Description of other types of interface buses used in a personal computer; Personal Computer Buses
Engineering Design Key words: Audio, Modem, Interface Standard, AC-link, Specification, Spec, Interface, IC, Physical Interface, Description, Personal Computer Interface, PC, Peripheral Interface, Architecture, Physical Interface. What is AC97
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