Gain-shape vector quantization apparatus

Details Gain-shape vector quantization apparatus Gain-shape vector quantization apparatus

G - Physics

06

T

354/47

G06T 9/00 (2006.01) G10L 19/08 (2006.01) H03M 7/30 (2006.01)

Patent

CA 2019804

GAIN-SHAPE VECTOR QUANTIZATION APPARATUS ABSTRACT OF THE DISCLOSURE A gain-shape vector quantization apparatus for compressing the data of voice signals, comprising a code book portion which is constituted by a plurality of shape vectors and produces a plurality of selected shape vectors, a plurality of variable gain circuits that impart gains to the shape vectors produced from said code book portion, a plurality of synthesis filters that regenerate signals from the outputs of said variable gain circuits, an adder for adding the signals regenerated by said synthesis filters, and an evaluation unit which produces an index to select a plurality of shape vectors in the code book portion in order to minimize the error between the output of said adder and an input speech and further produces gain adjusting signals for the variable gain circuits.

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