Title :
Rate-distortion speech coding with a minimum discrimination information distortion measure
Author :
Gray, Robert M. ; Gray, Augustine H. ; Rebolledo, Guillermo ; Shore, John E.
fDate :
11/1/1981 12:00:00 AM
Abstract :
An information theory approach to the theory and practice of linear predictive coded (LPC) speech compression systems is developed. It is shown that a traditional LPC system can be viewed as a minimum distortion or nearest-neighbor system where the distortion measure is a minimum discrimination information between a speech process model and an observed frame of actual speech. This distortion measure is used in an algorithm for computer-aided design of block source codes subject to a fidelity criterion to obtain a 750-bits/s speech compression system that resembles an LPC system but has a much lower rate, a larger memory requirement, and requires no on-line LPC analysis. Quantitative and informal subjective comparisons are made among our system and LPC systems.
Keywords :
Rate-distortion theory; Speech coding; Distortion measurement; Filters; Laboratories; Linear predictive coding; Pulse modulation; Rate-distortion; Speech analysis; Speech coding; Speech processing; Speech synthesis;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.1981.1056410