5th European Conference on Speech Communication and Technology

Rhodes, Greece
September 22-25, 1997

A Low-Bit-Rate Speech Coder Using Adaptive Line Spectral Frequency Prediction 1319

Carl W. Seymour, Tony A. Robinson

Cambridge University, Engineering Department, Cambridge, UK

This paper describes two aspects of a linear predictive coding (LPC) vocoder developed for operation on wide- band speech. The method for encoding the LPC parameters, based on the use of an adaptive predictor, is pre- sented together with an extension to the vocoder model which enables it to operate on speech sampled at 16kHz rather than 8kHz. Good-quality operation on wide-band speech is achieved with an increase in bit rate of about 500 bits/s. Diagnostic rhyme test (DRT) results demonstrate the improvement in intelligibility gained through coding speech at the higher sample rate.

Full Paper

Bibliographic reference.  Seymour, Carl W. / Robinson, Tony A. (1997): "A low-bit-rate speech coder using adaptive line spectral frequency prediction 1319", In EUROSPEECH-1997, 1319-1322.