Title:
A voice to digital converter and a sound encoding method
Document Type and Number:
Japanese Patent JP5942174
Kind Code:
B2
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.
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Inventors:
Toshiyuki Morii
Application Number:
JP2015018334A
Publication Date:
June 29, 2016
Filing Date:
February 02, 2015
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G10L19/16; G10L19/107
Domestic Patent References:
| JP2003195899A | ||||
| JP2002523806A |
Foreign References:
| WO2008001866A1 |
Attorney, Agent or Firm:
Koichi Washida
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