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AMBE-3000F™ Vocoder Chip Users Manual

Version 3.4, April, 2014

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-3000F™ 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 000F 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. 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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