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參數資料
| 型號： | CS4922 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | MPEG/G.729A AUDIO DECODER SYSTEM |
| 中文描述： | MPEG/G.729A音頻解碼器系統 |
| 文件頁數： | 1/34頁 |
| 文件大小： | 662K |
| 代理商： | CS4922 |
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Preliminary Product Information
This document contains information for a new product.
Cirrus Logic reserves the right to modify this product without notice.
1
Copyright
Cirrus Logic, Inc. 1999
(All Rights Reserved)
P.O. Box 17847, Austin, Texas 78760
(512) 445 7222 FAX: (512) 445 7581
http://www.cirrus.com
CS4922
MPEG/G.729A Audio Decoder System
Features
l
DSP Optimized for Audio Decode, 24-bit
Fixed Point w/48-bit Accumulator
l
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
l
MPEG-1 & MPEG-2 Layers 1 & 2 With All
Sample/Bit Rates and Ancillary Data Support.
l
MPEG-1 & MPEG-2 Packetized Audio
Stream and Elementary Stream Input
l
G.729A Audio Decode
l
PCM Synthesis for Auxiliary Audio
l
Pin Compatibility with CS4920A and Primary
Feature/Firmware Compatible
l
+5 Volt Only CMOS, 44 pin PLCC
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.
The CS4922 is tailored to include the necessary hard-
ware and firmware to ensure proper audio/video
synchronization for MPEG-2 audio decompression. In
addition to audio decoding this programmable DSP solu-
tion provides robust error concealment and feature
implementations like ancillary data support and PCM
synthesis.
The CS4922 can also support the decode of other com-
pression standards such as G.729A with a separate
download image. The flexible architecture of the CS4922
provides the ability to mix compressed audio with data
from the auxiliary PCM port.
ORDERING INFORMATION
CS4922-CL
CDB4922
44-pin PLCC
Evaluation Board
VD1
VD4
SCK/SCL SDA/CDOUT CDIN CS REQ
VA+
Serial Control Port (SPI or I
2
C)
AUXLR
AUXIN
AUXOUT
AUXCLK
FSYNC
SCLK
SDATA
Auxiliary
Serial Audio
Port
Serial
Audio
Port
RESET
90_CLK
BOOT
33 bit Counter
DGND1
DGND4
DSP
FLT CLKIN EXTCK ALTCLK CLKOUT
PLL
+
Clock Manager
Stereo DAC
AOUTM
AOUTL
AOUTR
AES/EBU - S/PDIF
Transmtter
TX
Programmable
IO/ Pins
PIO
XF1
XF2
XF3
XF4
AGND1 AGND2
JUL ‘99
DS227PP2
相關PDF資料 |
PDF描述 |
|---|---|
| CS492301-CL | Multi-Channel Digital Audio Decoders |
| CS492305-CL | Multi-Channel Digital Audio Decoders |
| CS492401-CL | Multi-Channel Digital Audio Decoders |
| CS492405-CL | Multi-Channel Digital Audio Decoders |
| CS492501-CL | Multi-Channel Digital Audio Decoders |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CS4922-CL | 制造商:CRYSTAL 功能描述:IC,CD-PLAYER DECODER,CMOS,LDCC,44PIN,PLASTIC |
| CS4922-CLEP | 制造商:CRYSTAL 功能描述:IC,CD-PLAYER DECODER,CMOS,LDCC,44PIN,PLASTIC |
| CS4923 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Multi-Channel Digital Audio Decoders |
| CS492301-CL | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Multi-Channel Digital Audio Decoders |
| CS492305-CL | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:Multi-Channel Digital Audio Decoders |
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