Title:
AUDIO SIGNAL OUTPUT DEVICE AND AUDIO SIGNAL OUTPUT METHOD
Document Type and Number:
WIPO Patent Application WO/2013/054484
Kind Code:
A1
Abstract:
The present invention provides an audio signal output device and an audio signal output method, whereby favorable high-frequency signal interpolation can be achieved. The audio signal output device and the audio signal output method using the same are provided with: a signal input unit to which a PCM signal is input; a sound information acquisition unit that acquires state information of the sound of the PCM signal input to the signal input unit; an interpolation parameter determination unit that, on the basis of the sound state information acquired by the sound information acquisition unit, determines an interpolation parameter for setting a polynomial to be applied to the PCM signal; and an interpolation processing unit that interpolates new sampling points between the sampling points of the PCM signal by applying the polynomial set on the basis of the determined interpolation parameter to the PCM signal, and then generating and outputting a PCM audio signal of which the high-frequency range has been interpolated.
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Inventors:
MASUDA TSUYOSHI (JP)
NAGAHAMA KATSUMASA (JP)
SATO YASUSHI (JP)
NAGAHAMA KATSUMASA (JP)
SATO YASUSHI (JP)
Application Number:
PCT/JP2012/006274
Publication Date:
April 18, 2013
Filing Date:
October 01, 2012
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
MASUDA TSUYOSHI (JP)
NAGAHAMA KATSUMASA (JP)
SATO YASUSHI (JP)
MASUDA TSUYOSHI (JP)
NAGAHAMA KATSUMASA (JP)
SATO YASUSHI (JP)
International Classes:
H03H17/00; G10L21/0388; H03H17/02
Domestic Patent References:
| WO2006011265A1 | 2006-02-02 |
Foreign References:
| JP2006081168A | 2006-03-23 | |||
| JP2004198485A | 2004-07-15 |
Attorney, Agent or Firm:
TANI & ABE, p. c. (JP)
Patent business corporation A valley and Abe patent firm (JP)
Patent business corporation A valley and Abe patent firm (JP)
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