MSM7719-01 Datasheet, PDF (2/40 Pages) OKI electronic componets – Echo Canceler with ADPCM Transcoder

¡ Semiconductor
MSM7719-01
BLOCK DIAGRAM
ATTtgrx
Tone Generator (DTMF etc).
ATTtgtx
DETSL
DETT
DETP
LTHR
LDCL
LCCL
LHD
LCLP
LHLD
LATT
LGC
LATTG2-0
LATTL2-0
ECMODE
ATHR
ADCL
ACCL
AHD
ACLP
AHLD
AATT
AGC
AATTG2-0
AATTL2-0
SinL
+
+
ATTIL
ATTsL
Center
Clip
Line
Adaptive FIR Filter
(LAFF)
ATTgL
SoutL
Power Calc.
Howling Detector
Double Talk Detector
RinL
+
RoutL
GainL ATTrL
Line Echo Canceler
ATTrA GainA
RinA
Power Calc.
Howling Detector
Double Talk Detector
RoutA
+
SoutA
ATTgA
Acoustic
Adaptive FIR Filter
(AAFF)
Center
Clip
ATTIA
+
–
+
ATTsA
SinA
Acoustic Echo Canceler
Mute
Note Gen.
Line
Echo
Canceler
Controller
Acoustic
Echo
Canceler
Controller
Power Detect
Voice Detect
VREF
ADPCM TRANSCODER
ADPCM
CODER
ADPCM
DECODER
Timing
Gen.
P/S
&
S/P
I/O Controller
N/L L/N N/L L/N N/L L/N
MCU I/F
P/S&S/P
Timing
Gen.
Clock Gen.
Test I/F
MLV0-2
MUTE
VOXI
VOXO
SG
BCLKA
SYNCA
IS
IR
CONTA
IOSL0-1
V_DDD1-3
V_DDA
DG1-3
AG
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