ECHO CANCELLATION
2016-08-23
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The term echo cancellation is used in telephony to describe the process of removing echo from a voice communication in order to improve voice quality on a telephone call. In addition to improving subjective quality, this process increases the capacity achieved through silence suppression by preventing echo from traveling across a network. Echo cancellation involves first recognizing the originally transmitted signal that re-appears, with some delay, in the transmitted or received signal. Once the echo is recognized, it can be removed by' subtracting' it from the transmitted or received signal. This technique is generally implemented using a digital signal processor (DSP), but can also beimplemented in software. Echo cancellation is done using either echo suppressors or echo cancellers, or in some cases both.
The rapid growth of technology in recent decades has changed the whole dimensions of communication. Today people are more interested in hands free communivation , in such a si
The rapid growth of technology in recent decades has changed the whole dimensions of communication. Today people are more interested in hands free communivation , in such a si
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