Title:
HYBRID TYPE ANC SYSTEM
Document Type and Number:
Japanese Patent JP2020181046
Kind Code:
A
Abstract:
To provide a hybrid type ANC (active noise control) system with a small area and low power consumption.SOLUTION: A hybrid type ANC system B comprises: a feedback type ANC circuit 12 for outputting a first noise cancel signal with a first sampling rate; a feed-forward type ANC circuit 15 for outputting a second noise cancel signal with a second sampling rate; an interpolator 16 for over-sampling the inputted first audio signal and outputting it as a second audio signal; an output control part 20 for synchronizing the first noise cancel signal, the second noise cancel signal and the second audio signal with a clock signal to be output; an adder 17 to which the respective signals output by the output control part are inputted; and a DAC 18 for DA-converting an output signal of the adder to output it.SELECTED DRAWING: Figure 3
Inventors:
YAMAMOTO SATOSHI
Application Number:
JP2019082900A
Publication Date:
November 05, 2020
Filing Date:
April 24, 2019
Export Citation:
Assignee:
ASAHI KASEI DENSHI KK
International Classes:
G10K11/178; H03H17/00; H04R3/00
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Koichiro God
Hidetoshi Kohara
Mitsutsugu Sugimura
Koichiro God
Hidetoshi Kohara