What is Speech Coding?
"Speech Coding" is the term used for algorithms
or devices whose purpose is to decrease the bit rate for transmission of
a digital speech signal across a digital channel. This channel could be
either a digital cellular channel, a satellite channel or the Internet.
Development and widespread deployment of digital cellular and satellite
communication systems during the last twenty years have brought increased
attention to the role of speech coding in increasing the spectral efficiency
of a digital communication system. In the literature, this part of the
communication system as applied to speech transmission, has been called
"Source Coding". As with all other coding systems, a speech coding
algorithm has two primary parts, the "Encoder", located at the
transmitting or the source end of the system, and a "Decoder",
located at the receiving or the sink end of the system. The purpose of
this WWW page is to give an idea of the workings of some speech coding
algorithms and also demonstrate their applicability.
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