Speech coding apparatus

Details Speech coding apparatus Speech coding apparatus

G - Physics

10

L

354/47, 354/67

G10L 19/02 (2006.01) G10L 19/06 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2015274

SPEECH CODING APPARATUS ABSTRACT OF THE DISCLOSURE A speech coding apparatus including multipliers and prediction filters which successively process a plurality of signal vectors obtained from an index 2M and dimension N code book to obtain a reproduced speech signal; error detectors which find the error between the input speech signal and reproduced speech signal; and evaluators which calculate the optimum signal vectors giving the smallest errors, wherein the multipliers are connected to a reduced code book, which reduced code book is constituted of n number of code book blocks of index 2M/n and dimension N/n (where n is an integer of two or more) and wherein there are n number of multipliers, n number of prediction filters, n number of error detectors, and n number of evaluators corresponding to the code book blocks.

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