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PEB20954E

Smart Integrated Digital Echo Canceller

Infineon Technologies 

PEB 20954

PEF 20954

Introduction

1

Introduction

The Smart Integrated Digital Echo Canceller (SIDEC) suppresses echoes in

telecommunication networks which might disturb any kind of terrestrial or wireless

communication. It incorporates leading edge CMOS technology as well as INFINEON’s'

many years' experience in Telecommunication ICs.

In communication links reflections resulting in an electrical echo are due to hybrid splits

or imperfect terminations in subscribe loops. Acoustical echoes may occur due to poor

isolation of microphone and speaker of some telephone system. These electrical and

acoustical echoes disturb the quality of the transmission. To ensure high quality, pure

data transmission the ITU-T (International Telecommunications Union,

Telecommunication Standardization Sector) suggests in the recommendation G.131 the

use of echo cancellers. Echo cancellation is extremely desirable for data links with total

round trip transmission times of more than 50 ms.

Data Sheet

11

Rev. 2, 2004-07-28

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