Digital Voice Systems AMBE-3000 Specifications download pdf (Page 47)

AMBE-3000™ Vocoder Chip Users Manual

Version 2.8, August, 2011

O Management

Figure 18 Interface BLOCK Diagram Codec Mode

For codec mode, DCMODE_OUT can be output within every outgoing channel packet. By default, outgoing channel packets

do not contain DCMODE_OUT flags. The PKT_CHANFMT field used within a configuration control packet can be used to

tell the I/O handler to put DCMODE_OUT flags into subsequent outgoing channel packets.

5.1.3 Packet Mode

In packet mode, the speech and channel data use the same interface (either UART, parallel port, or McBSP serial port). All of

the speech and channel data to/from the AMBE-3000™ Vocoder Chip is formatted into packets. It is the responsibility of the

designed system to extract the speech/channel data from these packets in order to pass the information to/from the

codec/channel interface.

The AMBE-3000™ Vocoder Chip sends a packet in response to every packet received. When a control packet is received it

will respond with a control response packet. When a speech packet is received the AMBE-3000™ Vocoder Chip responds

with a channel packet. When a channel packet is received it responds with a speech packet.

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Digital Voice Systems AMBE-3000 Specifications Page 47