MSM7620 データシートの表示（PDF） - Oki Electric Industry

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MSM7620

Echo Canceler

Oki Electric Industry 

¡ Semiconductor

MSM7620

HOW TO USE THE MSM7620

The MSM7620 cancels the echo which returns to SIN using the RIN signal.

Connect the base signal to the R-side and the echo generated signal to the S-side.

Connection Methods According to Echos

Example 1:

Canceling acoustic echo (to handle acoustic echo from line input)

CODEC

MSM7620

CODEC

ROUT

RIN

Acoustic echo

m-law

AFF

SIN +

–

m-law

SOUT

+

Line input

H

Example 2: Canceling line echo (to handle line echo from microphone input)

Microphone Input

CODEC

MSM7620

CODEC

RIN

ROUT

m-law

SOUT

AFF

– + SIN

+

m-law

H

Line echo

Example 3:

Canceling line echo in a cascade connection

(to handle line echo from microphone input)

Microphone input

CODEC

MSM7620

CODEC

RIN Master ROUT

AFF

m-law

SOUT

–

+ SIN

m-law

H

H

+

PD0 - 15

Slave

AFF

Line echo

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