Description

The CS4922 is a complete audio decompression sub system implemented in a single high integration mixed signal CMOS chip. The CS4922 has been widely used in direct broadcast system set-top boxes and proprietary embedded systems which pull compressed audio from local system memory.

Features

DSP Optimized for Audio Decode, 24-bit Fixed Point w/48-bit Accumulator

On-Chip Functional Blocks Include:

  - DSP with RAM and ROM Memories

  - CD Quality Stereo DAC with Output Filtering

  - Mono Output & Digital Volume Control

  - S/PDIF Transmitter, Bidirectional PCM Audio Port

  - Internal Phase Locked Loop for Clocking

  - Dedicated Compressed Serial Input Interface

MPEG-1 & MPEG-2 Layers 1 & 2 With All Sample/Bit Rates and Ancillary Data Support.

MPEG-1 & MPEG-2 Packetized Audio Stream and Elementary Stream Input

G.729A Audio Decode

PCM Synthesis for Auxiliary Audio

Pin Compatibility with CS4920A and Primary Feature/Firmware Compatible

+5 Volt Only CMOS, 44 pin PLCC