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參數(shù)資料
| 型號： | TMS320AV120 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | MPEG Audio Decoder(MPEG音頻譯碼器) |
| 中文描述： | MPEG音頻解碼器（的MPEG音頻譯碼器） |
| 文件頁數(shù)： | 1/17頁 |
| 文件大?。?/td> | 380K |
| 代理商： | TMS320AV120 |
TMS320AV120
MPEG AUDIO DECODER
SCSS014A – MARCH 1994 – REVISED JANUARY 1996
Copyright
1996, Texas Instruments Incorporated
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Single-Chip ISO-MPEG (Layers 1 and 2)
Audio Decoder
Decodes Mono, Dual, Stereo, and Joint-
Stereo Modes
Supports All MPEG Sampling and Data
Rates
Does Not Require a Host Microprocessor
for Initialization or Operation
Accepts SCR and Audio PTS and Provides
Automatic Synchronization
Provides Status Information at Beginning
of Every Frame
Interfaces Directly to the TMS320AV220
Video Decoder
Hardware Frame Synchronization Input
Supports 16- and 18-Bit PCM Data
Recovers and Outputs All Ancillary Data
PCMCLK-to-Input-Data-Rate
Synchronization Signal
IEEE Standard 1149.1 (JTAG) Compatible
Low-Power Submicron CMOS EPIC
Technology, Fully TTL Compatible
description
The Texas Instruments (TI
) TMS320AV120 is a low-cost, stand-alone MPEG audio decoder. It implements the
ISO-MPEG audio decompression algorithm for layers 1 and 2. MPEG-compliant audio data streams at any of
the valid MPEG data and sampling rates are accepted, producing decompressed PCM audio output. Mono,
dual, stereo, and joint-stereo modes are supported. The serial-output data stream is suitable for direct input to
most commercially available one-bit D/A converters.
The design intent is to produce a simple, plug-and-play audio decoder that does not require a host
microprocessor for initialization and/or operation. The input is in MPEG audio-frame format with provisions for
audio/video synchronization. It is a single-chip solution with no provision or need for external buffer memory.
The input-data rate should match the actual compressed-audio-bit rate, although the ’AV120 has an input buffer
to absorb short-term input bit-rate variations. Ancillary data in the bit stream is recovered and output serially.
When the compressed-audio data is at the actual bit rate, a pulse-width-modulated error signal is generated
if the PCM output clock is not at the required frequency.
The decoded-sampling rate, stereo mode, error status, and de-emphasis information is available in the serial
status register synchronously with the beginning of the associated PCM data frame. The complete MPEG frame
header can also be read from the chip.
In systems where audio/video synchronization is required, the TMS320AV120 accepts the system clock
reference (SCR) and the audio presentation time stamp (PTS) information and synchronizes the audio output
to these time stamps.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC and TI are trademarks of Texas Instruments Incorporated.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SREQ
PCM_ERR
ANCOUT
ANCCLK
GND
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CC
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STATOUT
STATCLK
ERR_IN
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TMS
TDI
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CC
GND
BYPASS
OMODE0
OMODE1
NC
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FN PACKAGE
(TOP VIEW)
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TMS320AV220 | Video CD MPEG Decoder(視頻CD MPEG編碼器) |
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| TMS320AV411 | Digital NTSC/PAL Encoder(數(shù)字NTSC/PAL編碼器) |
| TMS320AV420 | Digital NTSC Encoder(數(shù)字NTSC編碼器) |
| TMS320C6424_1 | Fixed-Point Digital Signal Processor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMS320AV120FN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Audio Decoder & Support |
| TMS320AV220PCM | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Audio/Video Decoder for MPEG |
| TMS320AV410 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Encoder Circuit |
| TMS320AV410PJM | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TMS320AV411 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Color Encoder Circuit |
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