Title:
VECTOR QUANTIZATION DEVICE, VOICE CODING DEVICE, VECTOR QUANTIZATION METHOD, AND VOICE CODING METHOD
Document Type and Number:
WIPO Patent Application WO/2011/074233
Kind Code:
A1
Abstract:
Provided are a vector quantization device, a voice coding device, a vector quantization method, and a voice coding method which enable a reduction in the calculation amount of voice codec without deterioration of voice quality. In the vector quantization device, a first reference vector calculation unit (201) calculates a first reference vector by multiplying a target vector (x) by an auditory weighting LPC synthesis filter (H), and a second reference vector calculation unit (202) calculates a second reference vector by multiplying an element of the first reference vector by a filter having a high pass characteristic. A polarity preliminary selection unit (205) generates a polar vector by disposing a unit pulse having a positive or negative polarity, which is selected on the basis of the polarity of an element of the second reference vector, in the position of said element.
Inventors:
MORII, Toshiyuki (())
Application Number:
JP2010/007222
Publication Date:
June 23, 2011
Filing Date:
December 13, 2010
Export Citation:
Assignee:
PANASONIC CORPORATION (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
パナソニック株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 〒5718501, JP)
International Classes:
G10L19/14
Attorney, Agent or Firm:
WASHIDA, Kimihito (8th Floor, Shinjuku First West Bldg.,1-23-7, Nishi-Shinjuku, Shinjuku-k, Tokyo 23, 〒1600023, JP)
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