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 ?
Agere also offers a robust, single software driver that powers both the AC97 or PCI solutions for these chip sets.
"It is built on the modem daughter card (MDC) AC97 platform which provides the smallest form factor and has the lowest power requirement available for notebooks today.
The recorded signal was digitalized in a PC with a standard soundcard Realteck AC97 at 16 bits and 44.100 Hz sampling rates using Cool Edit (Adobe, San Jose, CA) program, and grasped types of sounds (cough sounds) (Figures 1 and 2).
The new system also includes a built-in four-speed Accelerated Graphics Port for graphic-intensive applications, as well as integrated support for AC97 Soft Audio for surround sound functionality.
The AC97 audio interface allows output of sound from digital files, CDs, or DVDs.
The board excels as a high-performance component for consumer-oriented and space-saving systems with its embedded AGP 4Xgraphics chipset and built-in AC97 CODEC audio subsystem.
The Compaq Notebook 100 is configured with the latest in notebook technology, including a 475 MHz AMD K6 (R)-2 processor with 3DNow!Technology, choice of a 12.1-inch SVGA HPA or TFT display, 2X AGP graphics with 4MB or 8MB SDRAM, 24X MAX CD-ROM, 5.0GB hard drive, v.90 56K modem (AC97).
The EBC-C3 includes 48 lines of parallel I/O, LPT interface, keyboard controller, mouse, real-time clock, AC97 audio and other core logic to make the board PC/AT compatible.
The Realtek ALC650 chip has a six-channel, full duplex AC97 2.2 compatible stereo audio codec enabling a rich audio experience for PC multimedia systems.
The ETX-P3Tx also supports 2X IDE ports with support for ATA 33/66, up to 512 Mbytes SDRAM, 10/100 Mbit Base-T Ethernet, Audio AC97 Code VIA, DVO (optional), LVDS up to SXGA 1,280 X 1,024, keyboard/mouse controllers, real-time clock, and watchdog timer.
The PCS-620 uses a low-power, 300 MHz Pentium[R] class processor and supports Dual 10/100 BASE T Ethernet ports, RS-232/422/485 serial ports, a CardBus port for wireless, GPS or other devices, dual USB ports, dual AC97 compatible audio, CRT and flat panel video to 1280x 1024, parallel, floppy, EIDE ports, and ambient temperature sensor.