AMBE-1000 Digital Voice Systems, Inc., AMBE-1000 Datasheet - Page 37

• Manufacturer Part Number: AMBE-1000
• Manufacturer: Digital Voice Systems, Inc.

4.1.12
4.1.13
4.1.14
4.1.14.1
0x13EC
Header
7 : MSB
Repeat
Frame
The AMBE-1000 is not recommended for new designs.
0x00
ID
Please refer to the AMBE-2000/2020 product line.
Control_0 Control_1 Control_2 Control_3
Framed Input : Control_0
Framed Input : Control_1, Control_2 and Control_3
Framed Input : Description of ID Control Functions : Command Frames
Framed Input : ID = 0x00 : Voice Data
Table
The Control_0 Field is recognized for ID values 0x00, 0x01, and 0x02. For ID values of
0x03, 0x04, 0x06 and 0xFE these controls have no relevance. Setting either of the
flags in Control_0 will cause the decoder to ignore the data in the Voice Data Bits field.
Table 4-G Control_0 Format
Frame Repeat : Setting the Frame Repeat bit to a 1 will cause the AMBE-1000™
decoder to construct the voice frame using the parameters from the previous frame.
This is an effective way to mask the effects of short periods of data loss. Repeating
more than 1 or 2 consecutive frames or repeating at close intervals will begin to
become noticeable to the listener.
Force Decoder Silence : Setting the Force Decoder Silence bit will cause the decoder
to output a frame of comfort noise. This is usually the desired alternative to frame
repeats if longer periods of data corruption (typically greater than 3 frames) are
encountered on the incoming channel data.
The functions corresponding to the inputs Control_1, Control_2 and Control_3 are all
dependant upon the ID value being used, see function descriptions below.
The ID field in the Framed format determines how the data within that 20 millisecond
frame is going to be interpreted. Only ID values in Table 4-F will be recognized.
Table 4-H Voice Data Input Frame Format
The most common ID value is 0x00. In this mode the Control_0 field is processed as
described in section 4.1.12. The Control_[1-3] fields have no function and must each
be set to 0x0000. The Voice Data Bits field is processed according to the Control_0
value and the selected coding rate. Remember that when using coding rates below
9600bps. even the trailing zeros in this field must be clocked into the AMBE-1000™.
4-G
Unused : 0
0x0000 0x0000 0x0000 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX 0xXXXX
6
The AMBE-1000 is not recommended for new designs.
Please refer to the AMBE-2000/2020 product line.
Unused : 0
5
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description of Standard Sleep Mode.
Unused : 0
page 37
4
Control_0
Unused : 0
3
Voice Data Bits
Unused : 0
2
Decoder
Silence
Force
1
Unused : 0
0 : LSB