msm7617 Oki Semiconductor, msm7617 Datasheet - Page 22

• Manufacturer Part Number: msm7617
• Description: 2-channel Echo Canceler
• Manufacturer: Oki Semiconductor

¡ Semiconductor
HOW TO USE THE MSM7617
The echo canceler cancels the echo on the RIN signal as returned by SIN. Connect the original
signal to the R side, and the signal generating the echo to the S side.
Connection Methods According to Echoes
Example 1. Cancel Acoustic Echo (applies to acoustic echo from line input)
Example 2. Cancel Line Echo (applies to line echo from microphone input)
Example 3. Cancel Both Acoustic Echo And Line Echo
Acoustic echo
Input
Acoustic echo
Input
CODEC
CODEC
CODEC
ROUT1
SIN1
ROUT
SIN
SOUT
CH1
AFF
RIN
+
+
AFF
MSM7617
+
–
AFF
+
RIN
SOUT
SIN
ROUT
CH2
AFF
+
CODEC
SIN2
ROUT2
CODEC
CODEC
Line echo
H
Line echo
Input
H
MSM7617
Input
H
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