Echo Canceller Software

[seminar class]

PRESENTED BY:

MARRYAM TAHIR
HASNA ARSHAD
ZURRIAT FATIMA

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SIGNIFICANCE
The key is to maintain customer loyalty by improving network quality thus generating additional revenue.
 Overview
 The new world of Internet telephony is facing one of the major challenges that long-distant calling had.
 “ECHO”
DEFINITION:
“An echo is the repetition of a sound caused
by the reflection of sound waves”
TYPES OF ECHO:
There are two main types of echo:
 Acoustic Echo (audio conferencing speaker and its microphone)
 Hybrid Echo (On a PSTN)
 ECHO CANCELLATION
 The process used to remove echo from a voice communication in order to improve voice quality.
BENEFIT:
 Echo cancellation increases the capacity achieved through silence suppression by preventing echo from a distant place.
 Echo canceller vendors are developing new high-density solutions to minimize the cost, space, and power consumption required per voice channel.
AIM:
 The prime objective of echo canceller is to improve clarity of audio/speech signal.
WHY ECHO CANCELLER SOFTWARE ?
Since now it has been implemented using hardware and is costly. So to avoid that a software based implementation is needed.
MARKET VALUE
The echo canceller market requirements have evolved dramatically over years. The most important are:
 Voice quality
 Cost
 Echo path coverage
 Processing Load
 ALGORITHMS
 TELETALEEM
 TOOLS
 C#
 DIRECTX
CONCLUSION:
 Hardware design and performance issues aside, the multicore architecture had considerable implications on the software development.
 The filtered or process audio data will provide high quality speech and hopefully will improve the quality of multimedia conferencing system one step further.