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1. (WO2018142770) SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND COMPUTER PROGRAM

Pub. No.:    WO/2018/142770    International Application No.:    PCT/JP2017/044374
Publication Date: Fri Aug 10 01:59:59 CEST 2018 International Filing Date: Tue Dec 12 00:59:59 CET 2017
IPC: G10K 11/178
H03M 3/02
H04R 1/10
H04R 3/00
H04R 3/04
Applicants: SONY CORPORATION
ソニー株式会社
Inventors: TAMORI, Yoshinori
田森 宜紀
ASADA, Kohei
浅田 宏平
ITABASHI, Tetsunori
板橋 徹徳
TSUCHIYA, Shinpei
土谷 慎平
Title: SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND COMPUTER PROGRAM
Abstract:
[Problem] To provide a signal processing device capable of suppressing external noise without degrading audio characteristics. [Solution] Provided is a signal processing device comprising: an A/D converter that includes a first delta sigma modulator for performing first delta sigma modulation processing on an input analog signal and outputs a digital signal with a predetermined sampling frequency and quantization bit number a; a filter unit that subjects the output of the A/D converter to digital filtering with a predetermined filter characteristic and outputs a digital signal with a predetermined sampling frequency and quantization bit number b; a second delta sigma modulator that performs second delta sigma modulation processing on the output of the filter unit and outputs a digital signal with the predetermined sampling frequency and quantization bit number a; and an adder that adds the output of the second delta sigma modulator and the input digital signal of the sampling frequency and the quantization bit number a.