User`s manual
Page 40
DVSI Confidential Proprietary
USB-3000™
User’s Manual
Version 1.6a
Section 3- Operation
Digital Voice Systems, Inc.
The Speech Compression Specialists
is the rate index of the bit rate the file is to be encoded at 3600 bps. -r39
enc encodes the PCM file and saves it to a file -
dvsi.pcm is the name of the PCM file to be encoded
dvsi36tst.bit is the name of the file to be saved
To validate that the file was encoded correctly simply compare the created file dvsi36tst.bit with the
imilar file dvsi36.bit included on the USB-3000™ CD.
In the USB-3000™ directory use the following DOS command.
s
C:\ Command Prompt
- ’ X
cmp dvsi36.bit dvsi36tst.bit
Figure 38 Command line to check bit exact
3.5.2. Decode Packets
dec is used to decode a previously encoded (.bit) file from the PC, When the USB-3000™ receives the
ncoded (.bit) file over the USB interface it is processed by the AMBE-3000™ Vocoder Chip’s decoder. The
t back to the PC via the USB interface and saved as the (.pcm suffix) file
amed in the command line.
Pack
-
e
synthesized digital speech data is sen
n
et Mode Decode File Example:
C:\ Command Prompt
- ’ X
usb3kcom.exe –port COM4 460800 –r 39 -dec dvsi36tst.bit dvsi36tst.pcm
Figure 39 Decode File Command Line Example
is the baud rate of the PC connection
dvsi36tst.bit is the name of the encoded file to be decoded
where
is the COM port on the PC that the USB-3000™ will communicate on COM4
460800
r 39 is the rate index of the bit rate the file is to be decoded at 3600bps. -
dec decodes the previously encoded file and saves it to a file -