User`s manual
AMBE-3000™-HDK Development Board
User’s Manual Version 1.1
Page 22
DVSI Confidential Proprietary
Operation
Step 5 Verify correct operation of the board by taking the board out of Idle Mode (default) and
setting the board into a3kdirect Mode and return it back to idle mode. When the HDK is in a3kdirect
mode LEDs D19 through D26 will light, demonstrating that the HDK interface is functioning.
Example - To set the board into a3kdirect Mode and then set the HDK board back to the default Idle
Mode
C:\ Command Prompt
-
’
X
hdkcom –port COM4 460800 –mode a3kdirect
hdkcom –port COM4 460800 –mode idle
where:
COM4 is the COM port on the PC that the HDK will communicate on
460800 is the baud rate of the PC connection
-mode a3kdirect is to set the board into a3kdirect Mode (D19 – D26 LED’s ON)
-mode idle is to set the board back into idle Mode (only D26 LED ON)
Also included on the HDK CD disk are sample speech and compressed speech files as described
below:
<file name>.pcm -- (pcm format audio file 16 bit audio file sampled at 8kHz.)
<file name>.pcma -- (a-law format audio file 8 bit audio file sampled at 8kHz.)
<file name>.pcmu -- (µ-law format audio file 8 bit audio file sampled at 8kHz.)
<file name>-r<rate index #>.bit -- (encoded data from a PCM file)
compressed speech files from a .pcm (PCM) format file, that are encoded (recorded) at a data rate as
indicated by the rate index number that follows the -r. For example, dvsi-r37.bit is a compressed data
file encoded at rate index 37 which is a data rate of 2400bps.
<file name>-r<rate index #>.bita -- (encoded data from an a-law file)
compressed speech files from a .pcma (a-law) format file, that are encoded (recorded) at a data rate as
indicated by the rate index number that follows the -r. For example, dvsi-r39.bit is a compressed data
file encoded at rate index 39 which is a data rate of 3600bps.
<file name>-r<rate index #>.bitu -- (encoded data from an µ-law file)
compressed speech files from a .pcmu (µ-law) format file, that are encoded (recorded) at a data rate as
indicated by the rate index number that follows the -r. For example, dvsi-r42.bit is a compressed data
file encoded at rate index 42 which is a data rate of 4800bps.
<file name>-r<rate index #>.pcm -- (encoded/decoded PCM file)