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參數資料
| 型號： | W9320 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 編解碼器 |
| 英文描述： | ADPCM Codec(ADPCM編解碼器) |
| 中文描述： | A/MU-LAW, ADPCM CODEC |
| 文件頁數： | 7/35頁 |
| 文件大小： | 444K |
| 代理商： | W9320 |
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W9320
Publication Release Date: August 1997
- 7 -
Revision A1
U
interface
2B+D
Σ
Remote Office Terminal
(ROT)
U
interface
2B+D
ADPCM
Codec
Σ
Σ
Central Office Terminal
(COT)
Channel 1
Channel 2
Channel 3
Channel 4
Centeral
Office (CO)
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
End User
Telephone System
Micro-Controller
Micro-Controller
ADPCM
Codec
Σ
ADPCM
Codec
Σ
ADPCM
Codec
ADPCM
Codec
Σ
ADPCM
Codec
Σ
ADPCM
Codec
Σ
ADPCM
Codec
Figure 5-1 System Diagram for Pair Gain Application
5.2. Cordless Phone System
Figure 5-2 shows a cordless phone system block diagram. On the transmission side, the voice is sent
to the W9320 ADPCM Codec from the external microphone. First, the analog speech signal is
digitized into a 14-bit linear signal and compressed into 32 Kbps ADPCM data. The compressed
signal is then sent to the W9310F SST which provides all the baseband functions required for an FCC
Part 15 compliant cordless phone. The SST W9310 will generate the spread spectrum binary
sequence for output to an RF modulator. The microprocessor manages the other functions of the
cordless phone such as the keypad and display control. On the receive side, the WHT9360 RF
Module converts the received signal to baseband. The W9310 SST then performs the de-correlation
and demoulation and sends the 32K bps speech signal into the W9320 ADPCM. The W9320 then
reconstructs the digital speech signal into an analog signal using the 32K ADPCM decoder before
sending this analog signal to the speaker.
ADPCM
Voice Codec
W9320
Spread Spectrum Transceiver
SST W9310F
Microprocessor
W921E880F
Microphone
Speaker
RF Module
WHT9360
Antenna
Figure 5-2 System Diagram for Cordless Phone Application
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