CT8022 Datasheet, PDF (137/194 Pages) List of Unclassifed Manufacturers – VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR

Version: 1.18
PRELIMINARY/CONFIDENTIAL
TrueSpeech® Co-Processor
9.20.9 Reading the Filter History Register
The Filter History Register for each Filter F0-F3 can be read using the command:
Command (515CH):
0101
0001
0101
1100
(15-12)
(11-8)
(7-4)
(3-0)
Status:
.... n-12 n-11 n-10 n-9 n-8 n-7 n-6 n-5 n-4 n-3 n-2 n-1
n
(15-13) (12) (11) (10) (9)
(8)
(7)
(6)
(5)
(4)
(3)
(2)
(1)
(0)
The status response shows the detection decision for the most recent 15ms half-frame n and up to the last 15 half-
frames n-1 to n-15. By default, the CT8022 only checks from n to n-7, and ignores n-8 to n-15. The default
detection algorithm looks for five “1” bits in the range “n” to “n-7”.
To read the History Register for Filter F1, use the following command sequence:
Command
5155H
515CH
Status Response
5155H
XXXXH
Action
Select Filter F1
Filter F1 History Register is read
9.20.10 Reading the Frame Counter
The CT8022’s internal 16-bit frame counter can be read using the following command:
Command (5144H):
0101
0001
0100
0100
(15-12)
(11-8)
(7-4)
(3-0)
Status:
16-bit Frame Counter
(15-0)
CT8022A11AQC FW Revision 0118
DSP GROUP, INC., 3120 SCOTT BOULEVARD
137
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All specifications are subject to change without prior notice.