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Title:
SIGNAL PROCESSING DEVICE, CONTROL METHOD, PROGRAM AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2019/009204
Kind Code:
A1
Abstract:
A conversion device 2 comprises a time window segmentation block 21, an FFT block 22, an attenuation amount limitation block 23, a quantization noise attenuation block 24, a harmonic overtone generation block 25, an IFFT block 26, and a time window resynthesis block 27. The attenuation amount limitation block 23 determines the maximum attenuation amount of quantization noise to be attenuated in the quantization noise attenuation block 24 on the basis of the magnitude of the signal level of sound data supplied from the time window segmentation block 21. The quantization noise attenuation block 24 attenuates the quantization noise by adjusting amplitude in a frequency domain on the basis of the maximum attenuation amount determined by the attenuation amount limitation block 23.

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Inventors:
HASEGAWA, Shin (Kawagoe Plant 25-1, Yamada, Kawagoe-sh, Saitama 55, 〒3508555, JP)
SATO, Yayoi (Kawagoe Plant 25-1, Yamada, Kawagoe-sh, Saitama 55, 〒3508555, JP)
Application Number:
JP2018/024840
Publication Date:
January 10, 2019
Filing Date:
June 29, 2018
Export Citation:
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Assignee:
PIONEER CORPORATION (28-8, Honkomagome 2-chome Bunkyo-k, Tokyo 21, 〒1130021, JP)
International Classes:
H03M1/08; H03G9/00; H04R3/00
Attorney, Agent or Firm:
NAKAMURA, Toshinobu et al. (3rd Floor Oak Building Kyobashi, 16-10, Kyobashi 1-chome, Chuou-k, Tokyo 31, 〒1040031, JP)
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