參數(shù)資料
型號(hào)： AMBE2000
廠商： Electronic Theatre Controls, Inc.
英文描述： VOCODER CHIP
中文描述： 聲碼器芯片
文件頁(yè)數(shù)： 25/47頁(yè)
文件大?。?/td> 324K
代理商： AMBE2000
AMBE-2000 Vocoder Chip
User’s Manual Version 3.0
page 25
Visit us at
www.dvsinc.com
Confidential Proprietary, Subject to Change
Figure 5-A Basic Formatted I nput Format
W ord #
Description
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
Header always set to 0x13EC
Power Control (8bits)
Rate info 0
Rate info 1
Rate info 2
Rate info 3
Rate info 4
Unused in Input
Unused in Input
Unused in Input
DTMF Control – see Tables 5-E and 5-F
Control Word 2 – see Table 5-G
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Channel Data
Control Word 1 (8 bits) – see Table 5-B
See Tables 5-C and 5-D
(
o
2
2
(
(
5.2.1 Formatted Input : Word 0 : Header
The decoder uses the header information to synchronize with the beginning of each 20 millisecond frame. this 16 bit word
MUST
be
0x13EC
.
5.2.2 Formatted Input : Word 1 : Power Control
Set the encoder to
0x00
in the 8-bit Power Control field of an output frame for normal use. For Power Down Mode, set this
value to
0x55
. This causes the AMBE-2000 to enter low power mode. To exit low power mode, the device must be reset
through the hardware.
Table 5-A Formatted I nput : I D Values Summary
I D
Type
Description
0x00
Voice Data
This ID value instructs AMBE-2000 to operate in normal fashion
0x55
Low Power Mode
When this mode is activated the AMBE-2000 Vocoder Chip will go into
a mode which conserves power, where no voice packets are being
processed.
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