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Patent Searching and Data


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.

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:
JPH08123495A1996-05-17
JP2003323199A2003-11-14
Other References:
See also references of EP 1796084A4
Attorney, Agent or Firm:
Washida, Kimihito (Shintoshicenter Bldg. 24-1, Tsurumaki 1-chom, Tama-shi Tokyo 34, JP)
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