Provided by: Science and Development Network (SciDev.Net)
Date Added: Mar 2013
A major objective in speech coding is to compress the signal, that is, to employ as few bits as possible in the digital representation of the speech signal. The efficient digital representation of the speech signal makes it possible to achieve bandwidth efficiency in the transmission of the signal over a variety of communication channels, or to store it efficiently on a variety of magnetic and optical media. Since the digitized speech is ultimately converted back to analog form for the user, an important consideration in speech coding is the level of signal distortion introduced by the digital conversion process.