Speech Encoding using LPC Method

Abstract

Today a lot of research work is going on in industry and educational institutes on how to efficiently encode and transmit the speech signal from the transmitter and retrieve it back with high accuracy at the receiver. Shortly, speech encoding is a way to transmit speech using lower data rate. The past has witnessed tremendous progress in the application of low rate speech coders to civilian and military communications as well as computer related applications. Central to this progress has been the development of new speech coders capable of producing high quality speech at low data rates.

Most of these coders incorporate mechanisms to represent the spectral properties of speech, provide for speech waveform matching, and optimize the coders’ performance for the human ear. A number of these coders have already been adopted in international cellular telephony standards. In cellular telephony systems, service providers are continuously met with the challenge of accommodating more users within a limited allocated bandwidth. For this reason, manufacturers and service providers are continuously in search of low bit rate speech coders that deliver toll-quality speech. LPC is such a low bit rate speech coder which enables the service provider to share a limited bandwidth among more users.