Coding device, decoding device, method, program and recording medium thereof

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 10074376
APP PUB NO 20170047075A1
SERIAL NO

15306622

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Abstract

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A technology of accurately coding and decoding coefficients which are convertible into linear prediction coefficients even for a frame in which the spectrum variation is great while suppressing an increase in the code amount as a whole is provided. A coding device includes: a first coding unit that obtains a first code by coding coefficients which are convertible into linear prediction coefficients of more than one order; and a second coding unit that obtains a second code by coding at least quantization errors of the first coding unit if (A-1) an index Q commensurate with how high the peak-to-valley height of a spectral envelope is, the spectral envelope corresponding to the coefficients which are convertible into the linear prediction coefficients of more than one order, is larger than or equal to a predetermined threshold value Th1 and/or (B-1) an index Q′ commensurate with how short the peak-to-valley height of the spectral envelope is, is smaller than or equal to a predetermined threshold value Th1′.

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Patent Owner(s)

  • NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harada, Noboru Atsugi, JP 103 442
Kamamoto, Yutaka Atsugi, JP 126 290
Moriya, Takehiro Atsugi, JP 148 1134

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