The objective of speech coding is to transform the analogue speech signal to a digital representation. Redundancies, introduced in the speech signal during the human speech production process, make it possible to encode speech at low bit rates. Moreover, our hearing system isn't equally sensitive to distortions at different frequencies and has a limited dynamic range. Speech coding techniques take advantage of these properties for reducing the bit rate. Two projects have been done on speech coding.
More information is available by following the links below.
Investigation of Sinusoidal Model for Speech Coding . There is also a project on isolated digit recognition here , and project on time-frequency analysis of speech here . This page was last updated on the November 4, 2000.