12-03-2011, 10:49 AM
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.
