CT8022 Datasheet, PDF (113/194 Pages) List of Unclassifed Manufacturers – VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR

Version: 1.18
PRELIMINARY/CONFIDENTIAL
TrueSpeech® Co-Processor
9.15.6.1
C1
S1
Detailed Train & Lock Command Description
E012
E012
C2/S2: (The default C2 parameter command value for this command is 0004H)
Force Lock State
Enable Lock
Microphone
0
Mechanism
Input Pre-Scale
Mic Vox
Sensitivity
(15)
(14)
(13-12)
(11)
(10)
Far-End Vox
Sensitivity
(9)
0
NLP/AS/AB AEC Train Speed AEC NLP Mode
Force NLP
NLP Threshold
Control
Scaling
(8)
(7)
(6)
(5)
(4)
(3-0)
Force Lock
State:
Set this bit to 1 to force the AEC into the locked state
Enable Lock
Mechanism:
Set this bit to 1 to enable the AEC train and lock mechanism
Microphone
Input Pre-Scale:
00:
Sets normal microphone input scaling
01:
Sets x2 (+6dB) microphone input scaling
10:
Sets x4 (+12dB) microphone input scaling
11:
Sets x8 (+18dB) microphone input scaling
Sets the microphone signal input scaling; this modifies the microphone input signal prior to all other signal
processing.
Mic Vox
Sensitivity:
0:
Set normal microphone VOX sensitivity
1:
Reduce microphone VOX sensitivity by 12 dB
This affects the speech direction decision algorithm.
Far-End Vox
Sensitivity:
0:
Set normal far-end (line-side) VOX sensitivity
1:
Reduce far-end VOX sensitivity by 12 dB
This affects the speech direction decision algorithm.
NLP/AS/AB
Control:
0:
Activate NLP/AS/AB if speech direction detected is from far-end or if
measured AEC cancellation exceeds threshold programmed for LOCK
1:
Activate NLP/AS/AB ONLY if measured AEC cancellation exceeds threshold
programmed for LOCK
AEC Train Speed:
0:
Adapt AEC at normal rate
1:
Adapt AEC at half-rate
This reduces the AEC processing load at the expense of increasing the training time. This control acts independently
of the mechanism for limiting the number of AEC training cycles per speech frame. The AEC Train Speed control
affects both DSVD speakerphone mode and Standalone Speakerphone mode.
AEC NLP Mode:
0:
center clipping mode
1:
center subtraction mode
CT8022A11AQC FW Revision 0118
DSP GROUP, INC., 3120 SCOTT BOULEVARD
113
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490
All specifications are subject to change without prior notice.