CT8022 Datasheet, PDF (190/194 Pages) List of Unclassifed Manufacturers – VOIP/VON G.723.1, G279AB TRUESPEECH CO-PROCESSOR

TrueSpeech® Co-Processor
PRELIMINARY/CONFIDENTIAL
Version: 1.18
Pulse_sign_3:5bits
(15-11
Pulse_Sign_2:6bits
(10-5)
Pulse_Sign_1:5bits
(4-0)
The following shows the bit packing used by the CT8020, CT8021, and CT8022 for the 5.3 data rate. The
compressed speech frame consists of a block of 10 16-bit words. The least significant 2 bits indicate the type of
compressed speech block.
LSP Index ( low 14 bits )
(15-2)
Vad + Rate
(1-0)
Adapt. CodeBook Lag_0:6bits
(15-10
LSP Index : ( high 10 bits)
(9-0)
Combined_Gain_0 Adapt.CdBkLag_3
(15-12)
(11-10)
Adapt.CodeBookLag_2:7bits
(9-3)
Adapt.CdBkLag_1 Adapt.CdBkLag:_0
(2-1)
(0)
Combined_Gain_1:8bits
(15-8_
Combined_Gain_0:8bits
(7-0)
Combined_Gain_2:12bits
(15-4)
Combined_Gain_1:4bits
(3-0)
Grid_3 Grid_2 Grid_1 Grid_0
(15) (14) (13) (12)
Combined_Gain_3:12bits
(11-0)
Pulse_Position_1:4bits
(15-12)
Pulse_Position_0:12bits
(11-0)
Pulse_Position_2:8bits
(15-8
Pulse_Position_1:8bits
(7-0)
Pulse_Position_3:12bits
(15-4)
Pulse_Position_2:4bits
(3-0)
Pulse_Sign_3:4bits
(15-12)
Pulse_Sign_2:4bits
(11-8)
Pulse_Sign_1:4bits
(7-4)
Pulse_Sign_0:4bits
(3-0)
190
DSP GROUP, INC., 3120 SCOTT BOULEVARD
CT8022A11AQC FW Revision 0118
SANTA CLARA, CA 95054 PH: 408 986 – 4300 FAX: 408 986 – 4490
All specifications are subject to change without prior notice.