Title:
SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2019/111703
Kind Code:
A1
Abstract:
The present technology relates to a signal processing device, a signal processing method and a program which can improve the modulation rate of a Pulse Width Modulation (PWM) signal. PWM modulation is performed in which: either one of 0 and 1, which is represented by each bit of a Pulse Density Modulation (PDM) signal obtained by PDM modulation of an audio signal, is converted to the longest pulse of the longest pulse width of a PWM signal of the same period as the PDM signal period; and the other of 0 and 1 of the PDM signal is converted to the shortest pulse of the shortest pulse width of a PWM signal at a position adjacent to the center of the PWM signal period. The technology is applicable to audio reproduction devices that reproduce audio signals.
Inventors:
TAMORI YOSHINORI (JP)
Application Number:
PCT/JP2018/042923
Publication Date:
June 13, 2019
Filing Date:
November 21, 2018
Export Citation:
Assignee:
SONY CORP (JP)
International Classes:
H03M1/82; H03M1/50; H03M1/60; H03M3/02; H03M5/08; H03M5/10; H03M7/32; H04R3/00
Foreign References:
| JP2008035027A | 2008-02-14 | |||
| JP2009005302A | 2009-01-08 | |||
| JP2003229768A | 2003-08-15 | |||
| JP2016019274A | 2016-02-01 | |||
| JP2000068835A | 2000-03-03 | |||
| JP2006042315A | 2006-02-09 | |||
| JP2000068841A | 2000-03-03 | |||
| US20100289546A1 | 2010-11-18 |
Attorney, Agent or Firm:
NISHIKAWA Takashi et al. (JP)
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