AC'97


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AC'97

(Audio Codec'97) A specification for audio and modem circuits on a PC motherboard. Introduced in 1996 by Intel, AC'97 provides six channels (5.1) of 20-bit, 48 kHz audio. It supports one audio stream per system and a two-element array microphone.

AC Link
AC'97 comprises a controller connected to analog/digital codecs by a 5-wire TDM interface called "AC Link." The two subsystems separate the digital controller, which is built into the PC chipset, from the analog circuits, which can be in a chip on the motherboard, in an interchangeable riser card or cabled close to the I/O connectors. For international certification (homologation), modem codecs are often placed on riser cards. See HD Audio and riser card.
References in periodicals archive ?
0 ports as well as a Gb LAN Ethernet port, and feature AC'97 CODEC; the X5DA8 also offers dual-channel U320 SCSI and ZCR SCSI RAID support.
To meet the needs for e-home use, the ICH2 has an enhanced AC'97 interface supporting full surround-sound for Dolby Digital audio found on DVD and simultaneously supports a soft modem connection.
The BPC-S1130 can be optionally desk- or wall mounted, and features two drive bays, an integrated 2D/3D graphics engine, AC'97 sound and Ethernet.
Four of the new dsPIC33 DSCs also offer a CODEC interface supporting the I2S and AC'97 protocols.
Integrated audio features include SPI, I2S and AC'97 with six-channel 24-bit audio, and it also supports a wide array of software codecs including MP3, WMA and AAC.