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

Claim 18:
19. The audio playback system according to claim 15, wherein the automatic noise shaping circuit comprises:
a second transmission channel simulation unit receiving the anti-phase noise signal for generating a simulated anti-phase noise signal according to the channel transfer function;
a first adder circuit receiving the simulated anti-phase noise signal and the error signal for generating a restored environmental noise signal;
a shaping filter parameter generation unit receiving the restored environmental noise signal, and generating a first shaping filter parameter and a second shaping filter parameter according to the preset noise shape and the restored environmental noise signal;
a first shaping filter receiving the first shaping filter parameter and the interference signal for generating the shaped interference signal; and
a second shaping filter receiving the second shaping filter parameter and the error signal, for generating the shaped error signal.