Title :
Sample-by-sample gain adaptive celp coding of wideband audio
Author :
Chu, Man-Tak ; Chan, Cheung-Fat
Author_Institution :
Department of Electronic Engineering, City University of Hong Kong, 83, Tat Chee Avenue, Hong Kong
Abstract :
This paper presents a high quality wideband audio coder based on a low delay code excited linear predictive (LD-CELP) model where the excitation gain is adapted in a sample-by-sample manner. The proposed coder employs a backward adaptive predictor which introduces no extra delay to the system. A simple gain adaptive control is utilized to perform a sample-by-sample gain adaptive excitation model. In other words, the proposed coder exploits the advantages of the LD-CELP and ADPCM coding. This coder can provide transparent quality audio signals at a bitrate of 1.5 bits/sample.
Conference_Titel :
European Signal Processing Conference, 1996. EUSIPCO 1996. 8th
Conference_Location :
Trieste, Italy
Print_ISBN :
978-888-6179-83-6