AMBE-2000 Digital Voice Systems, Inc., AMBE-2000 Datasheet - Page 28

• Manufacturer Part Number: AMBE-2000
• Description: 2.0 - 9.6 KBPS Single ic For Toll-quality, Low Data Rate, Real Time Speech Compression
• Manufacturer: Digital Voice Systems, Inc.

The AMBE-2000™ uses these five words to set the source and FEC coding rates. Tables 5-C and 5-D list predefined values for
various source and FEC rates. These are only a representation of the most common rates that are requested. Please contact
DVSI for additional rate information if the desired rates are not listed. The software configurations in Table 5-C are
compatible for use with the AMBE-1000™ (using AMBE™ technology). If compatibility is not an issue, use the software
codes in Table 5-D to select speech and FEC rates to optimize use of the AMBE-2000™ (using AMBE+™ technology).
5.2.5
Should be set to 0x0000
5.2.6
Should be set to 0x0000
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Rate Info 0
Rate Info 0
0x9030
0x9348
0x9243
0xab50
0x934b
0xab60
0xab5b
0x9348
0x923e
0xab53
0xab58
0xab5d
0xab16
0x0028
0x5048
0x5250
0x1030
0x5360
0x5250
0x5048
0x1030
0x6b80
0x5250
0x5258
0x5250
0x5048
0x1030
0x902f
0xbf9b
0xbfc0
0x7fa0
0x7fc0
Framed Input: Word 7 : Unused in Input
Framed Input: Word 8 : Unused in Input
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Table 5-C Rate Selection Using Rate Info 0-4, compatible w/ AMBE-1000™ (AMBE™)
Rate Info 1
Rate Info 1
0x0000
0x0000
0x0000
0x0080
0x0000
0x0080
0x0000
0x0080
0x2030
0x2800
0x3000
0x0080
0x3400
0x0000
0xe400
0x0000
0x0000
0x0000
0x0001
0x0000
0x2010
0x0001
0x0005
0x0000
0x0001
0x0009
0x0000
0x0005
0x0000
0x000e
0x000e
0x2c00
Table 5-D Rate Selection Using Rate Info 0-4, AMBE-2000™ only (AMBE+™)
Rate Info 2
Rate Info 2
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x180c
0x0000
0x0000
0x1e0c
0x0000
0x2010
0x0000
0x4010
0x681a
AMBE-2000™ Vocoder Chip
User’s Manual Version 4.0
Rate Info 3
Rate Info 3
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x0000
0x341a
0x0000
0x0000
0x2412
0x3018
0x0000
0x542a
0x4127
0x0000
0x6834
0x0000
0x6a2e
0x511b
Rate Info 4
Rate Info 4
0x4330
0x6930
0x5348
0x3950
0x3950
0x7960
0x6860
0x7060
0x7460
0x5680
0x4490
0x49a0
0x31a0
0x72c0
0x67c0
0x6428
0x3948
0x4150
0x6750
0x6c60
0x7460
0x6860
0x7360
0x6c80
0x5280
0x7390
0x52a0
0x72a0
0x69c0
0x65c0
0x76c0
0x6f48
Speech Rate
Speech Rate
(bps)
(bps)
2400
2350
3600
3350
4000
3750
4800
4550
3600
3100
4150
4400
7750
4650
9600
4850
2000
3600
4000
2400
4800
4000
3600
2400
6400
4000
4400
8000
4000
9600
3600
2400
FEC Rate
FEC Rate
(bps)
1200
1700
2250
2800
3350
4750
(bps)
1600
1200
2400
2400
2800
4000
6000
7200
250
250
250
250
800
50
0
0
0
0
0
0
0
0
0
0
0
0
Page 28
Total Rate
Total Rate
(bps)
(bps)
2400
3600
4000
4800
6400
7200
8000
9600
2000
3600
4000
4800
6400
7200
8000
9600