User`s manual

AMBE-3000™-HDK Development Board
User’s Manual Version 1.1
Page 25
DVSI Confidential Proprietary
Operation
-ns <state>
where the noise suppression is either turned off (state=0) or on (state=1) (default=on)
-passthru
for this option, the PC controls the HDK to configure the AMBE-3000™, into codec mode.
In this mode, incoming data to the AMBE-3000™, gets output without any encoding or
decoding processing. Packets from the AMBE-3000™ are then sent to the appropriate
interface depending on which interface is selected.
[Process Selection]
This is the selection of what process the HDK is to perform.
where selection may be one of the following:
-enc with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
packet mode and the speech packets that are sent from the <infile> get encoded.
Channel packets are then sent back to the PC and the channel data is stripped from the
packets and written to <outfile>. When complete, the HDK is switched into IDLE mode.
-dec with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
packet mode and channel packet data from the file <infile> is decoded. The data in the
<infile> is expected to be in hard decision (8 bits per byte) format. Refer to the AMBE-
3000™ Vocoder Chip Users Manual Section 6.9 CHAND field description. The speech
packets are then sent back to the PC where the Speech data is extracted and written to
the <outfile>. When complete, the HDK is switched into IDLE mode
-decsd
with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
packet mode and channel packet data from the file <infile> is decoded. The data in the
<infile> is expected to be in 4-bit soft decision (2 bits per byte) format. Refer to the
AMBE-3000™ Vocoder Chip Users Manual Section 6.9 CHAND4 field description. The
speech packets are then sent back to the PC where the Speech data is extracted and
written to the <outfile>. When complete, the HDK is switched into IDLE mode
-encdec
with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
packet mode and speech packets that are sent from the <infile> get encoded. Channel
packets are then sent back to the PC and the channel data is stripped from the packets
and written to <outfile>. When complete, the HDK is switched into IDLE mode.
-play with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
codec mode. Channel data from the file <infile> is used to create AMBE-3000™ Vocoder
chip channel packets that are decoded and the resulting speech samples are sent to the
codec interface. The data in the <infile> is expected to be in hard decision (8 bits per
byte) format. Refer to the AMBE-3000™ Vocoder Chip Users Manual Section 6.9
CHAND field description. When all of the bits have been decoded, the HDK is switched
into idle mode. The <outfile> is not used.
-playsd
with this selection the PC controls the HDK to set the AMBE-3000™ vocoder chip into
codec mode. Channel data from the file <infile> is used to create AMBE-3000™ Vocoder
chip soft-decision channel packets that are decoded and the resulting speech samples
are sent to the codec interface. The data in the <infile> is expected to be in 4-bit soft
decision (2 bits per byte) format. Refer to the AMBE-3000™ Vocoder Chip Users Manual
Section 6.9 CHAND4 field description. When all of the bits have been decoded, the HDK
is switched into idle mode. The <outfile> is not used.