Patent ID: 11967304
Assignee: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A sound pick-up device comprising:
an adaptive filter configured to generate, from a reference signal, an estimated noise signal indicating a component of a noise signal contained in an input signal acquired by a microphone;
a signal generator configured to generate a noise elimination signal by subtracting the estimated noise signal from the input signal;
a coefficient update unit configured to update a filter coefficient of the adaptive filter using the noise elimination signal; and
an identification unit configured to identify at least one signal sample position among a plurality of signal sample positions from a signal sample position where the noise elimination signal has a maximum absolute value to a signal sample position where the noise elimination signal has an absolute value that is largest at a predetermined order,
wherein the coefficient update unit updates the filter coefficient at the at least one signal sample position identified by the identification unit.