Title :
A CELP codebook and search technique using a Hopfield net
Author :
Easton, M.G. ; Goodyear, C.C.
Author_Institution :
Dept. of Electr. Eng. & Electron., Liverpool Univ., UK
Abstract :
A new method of structuring a ternary excitation codebook for a CELP coder is introduced in which the main codebook is divided into several sub-codebooks. It is shown how a modified Hopfield neural net is capable of searching such a codebook and selecting a near optimum code-vector. Hence an algorithm is derived which offers considerable computational savings over previously proposed codebook search methods. Results are presented demonstrating the net´s performance and its effect on the subjective quality of the coded speech
Keywords :
encoding; filtering and prediction theory; neural nets; speech analysis and processing; CELP coder; Hopfield neural net; algorithm; code-vector; codebook search methods; coded speech; subjective quality; ternary excitation codebook;
Conference_Titel :
Techniques for Speech Processing, IEE Colloquium on
Conference_Location :
London
