msm7603 Oki Semiconductor, msm7603 Datasheet - Page 14

• Manufacturer Part Number: msm7603
• Description: Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
HOW TO USE THE MSM7603/7603B
The MSM7603/7603B cancels, based on the RIN signal, the echo which returns to SIN.
Connect the base signal to the R side and the echo-generated signal to the S side.
Connection Methods According to Echoes
Example 1:
Example 2:
Example 3: Canceling of both acoustic and line echo
Acoustic echo
Microphone input
Microphone input
Acoustic echo
(to handle both acoustic echo from line input and line echo from microphone input)
CODEC
Canceling acoustic echo (to handle acoustic echo from line input)
Canceling line echo (to handle line echo from microphone input)
CODEC
CODEC
ROUT
SIN
For acoustic echo
MSM7603B
MSM7603
+
AFF
ROUT
+
SOUT
SIN
RIN
–
MSM7603B
MSM7603B
RIN
SOUT
MSM7603
MSM7603
+
–
AFF
AFF
+
+
–
+
SOUT
RIN
RIN
SOUT
ROUT
SIN
For line echo
MSM7603B
MSM7603
–
AFF
+
+
CODEC
CODEC
SIN
ROUT
Lin echo
CODEC
MSM7603/7603B
H
H
Line echo
Line input
Line input
H
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