Patent ID: 11955108
Assignee: AIROHA TECHNOLOGY CORP.
Field: Other consumer goods (Other fields)
Classification: CPC G  H | IPC G  H

Claim 25:
26. The audio playback system according to claim 25, wherein the active noise filtering unit is a feedforward adaptive active noise filtering unit, the automatic noise shaping circuit is further adapted for shaping the second interference signal to a second shaped interference signal according to the preset noise shape, wherein the adaptive active noise cancellation apparatus further comprises:
a third transmission channel simulation unit receiving the second shaped interference signal for generating a second simulated shaped interference signal according to the channel transfer function; and
a second coefficient adjustment unit receiving the second simulated shaped interference signal and the shaped error signal, dynamically adjusting a filter parameter of the feedforward adaptive active noise filtering unit according to the second simulated shaped interference signal and the shaped error signal to minimize the error signal.