Specifications

AMBE-3000™ Vocoder Chip Users Manual
Version 2.8, August, 2011
Dat
a and Configuration Packets
6.11.4 Channel Packet Example 2
Following is another example of a channel packet for input to the AMBE-3000™ Vocoder Chip:
Channel Packet
Header
VOCODERID
Field
CHAND Field
SAMPLES
Field
CMODE
Field
StartByte Length Type VOCODERID Field Identifier CHAND Field Identifier CHAND Number of Bits CHAND Data SAMPLES Field Identifier SAMPLES Number of Samples CMODE Field CMODE Value
61 0010 01 40 01 38 00112233445566 03 A1 02 0000
Table 114 Channel Packet Example 2
The first byte (0x61) is the packet header byte. The next two bytes (0x0010), specify that the length of the packet (excluding
the header, length, and type bytes) is 16 bytes. The next byte (0x01) specifies that the packet type is a channel packet. The
next byte (0x40), is a ChannelID field identifier and the byte that follows (0x00) specifies vocoder 0 for subsequent fields. The
next byte (0x01) is a CHAND specifier and the following byte (0x38) specifies that 56 bits (7 bytes) of channel data follow.
The next 7 bytes contain the channel data to be decoded by the decoder. The next byte (0x03), is a field identifier for a
SAMPLES field. The next byte (0xA1), specifies that the decoder will output 161 samples rather than the normal 160 samples
when it produces the resulting speech packet. The next byte (0x02), is the field identifier for a CMODE field. The final 2
bytes (0x0000), are used to control the decoder mode.
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