Title:
信号処理装置、制御方法、プログラム及び記憶媒体
Document Type and Number:
Japanese Patent JP6816277
Kind Code:
B2
Abstract:
A converter 2 includes a time window cut-out block 21, a fast Fourier transform (FFT) block 22, an attenuation amount limitation block 23, a quantization noise attenuation block 24, an overtone generation block 25, an inverse fast Fourier transform (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 based on the magnitude of a signal level of sound data supplied from the time window cut-out block 21. The quantization noise attenuation block 24 adjusts amplitude in a frequency domain based on the maximum attenuation amount determined by the attenuation amount limitation block 23, to attenuate the quantization noise.
Inventors:
Makoto Hasegawa
Yayoi Sato
Yayoi Sato
Application Number:
JP2019527673A
Publication Date:
January 20, 2021
Filing Date:
June 29, 2018
Export Citation:
Assignee:
Pioneer Corporation
International Classes:
H03H17/02; H03M1/08
Domestic Patent References:
| JP7193502A | ||||
| JP11073726A | ||||
| JP10013244A |
Attorney, Agent or Firm:
Satoshi Nakamura
Tatsuo Egami
Tatsuo Egami