Title:
NOISE REDUCTION PROCESSING DEVICE, ACOUSTIC SYSTEM, AND CONTROL METHOD FOR NOISE REDUCTION PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/102200
Kind Code:
A1
Abstract:
According to the present invention, spurious noise is reduced in a noise reduction processing device provided with a loop filter and a quantizer. A difference calculation unit obtains a difference between an input signal and a predetermined feedback signal, and outputs it as an error signal. A delay signal adder adds the error signal and a predetermined delay signal and outputs it as an integrated signal. An internal dither adder adds the integrated signal and a predetermined internal dither signal and outputs it as a filter output signal. A delay unit in the filter delays the filter output signal and outputs it as a delay signal. A quantizer quantizes the filter output signal and feeds it back as a feedback signal.
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Inventors:
TAKAGI YUTAKA (JP)
Application Number:
PCT/JP2021/030757
Publication Date:
May 19, 2022
Filing Date:
August 23, 2021
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H03M7/32; H03M3/02
Domestic Patent References:
| WO2006002844A1 | 2006-01-12 |
Foreign References:
| JP2008181020A | 2008-08-07 | |||
| JP2007129363A | 2007-05-24 | |||
| JPH05160736A | 1993-06-25 | |||
| JP2019114837A | 2019-07-11 |
Attorney, Agent or Firm:
MARUSHIMA, Toshikazu (JP)
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