VECTOR CONVERSION DEVICE AND VECTOR CONVERSION METHOD

Title:

VECTOR CONVERSION DEVICE AND VECTOR CONVERSION METHOD

Document Type and Number:

WIPO Patent Application WO/2006/049179

Kind Code:

A1

Abstract:

There is provided a vector conversion device for converting a reference vector used for quantization of an input vector so as to improve a signal quality including audio. In this vector conversion device, a vector quantization unit (902) acquires a number corresponding to a decoded LPC parameter of a narrow band from all the code vectors stored in a code book (903). A vector dequantization unit (904) references the number of the code vector obtained by the vector quantization unit (902) and selects a code vector from the code book (905). A conversion unit (906) performs calculation by using a sampling-adjusted decoded LPC parameter obtained from an up-sampling unit (901) and a code vector obtained from the vector dequantization unit (904), thereby obtaining a decoded LPC parameter of a wide band.

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Inventors:

MORII TOSHIYUKI

Application Number:

PCT/JP2005/020129

Publication Date:

May 11, 2006

Filing Date:

November 01, 2005

Export Citation:

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Assignee:

MATSUSHITA ELECTRIC IND CO LTD (JP)
MORII TOSHIYUKI

International Classes:

G10L19/16; G10L21/0388

Foreign References:

JPH08123495A	1996-05-17
JP2003323199A	2003-11-14

Other References: