User`s manual

AMBE-3000™-HDK Development Board

User’s Manual Version 1.1

Page 27

DVSI Confidential Proprietary

Operation

Note: The hdkcom.exe program automatically switches the HDK into Codec Play/Record Mode (–mode

codec) when the command line uses any one of these three options. After the file is played/recorded

the HDK is automatically switched back into idle mode. If it is desired to keep the HDK in Codec

Play/Record mode to be ready to process audio then the

–mode codec

option must be used in the command line.

Play File to Audio Output

-play is used to (decode) a previously recorded (encoded) (.bit) file stored on the PC. When the HDK

receives the encoded (.bit) file over the USB interface it is processed by the AMBE-3000™ Vocoder

Chip’s decoder. This synthesized data bit stream is then converted into an analog signal using the

onboard D-to-A and played out the handset / RCA jack outputs.

Figure 12 Play / Record -play Block Diagram