MSM7603 Ver la hoja de datos (PDF) - Oki Electric Industry

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MSM7603

Echo Canceler

Oki Electric Industry 

¡ Semiconductor

MSM7603/7603B

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:

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

MSM7603

MSM7603B

ROUT

RIN

Acoustic echo

CODEC

AFF

SIN + – SOUT

+

CODEC

Line input

H

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

Microphone input

MSM7603

MSM7603B

RIN

ROUT

CODEC

SOUT

AFF

– + + SIN

CODEC

H

Lin echo

Example 3: Canceling of both acoustic and line echo

(to handle both acoustic echo from line input and line echo from microphone input)

MSM7603

MSM7603B

ROUT

RIN

MSM7603

MSM7603B

SOUT

SIN

Line input

Acoustic echo CODEC

Microphone input

AFF

SIN

+–

+

SOUT

For acoustic echo

AFF

CODEC

H

RIN

ROUT

Line echo

For line echo

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