Patent ID: 7929933

Claim:
A noise suppression apparatus which suppresses a noise component contained in an audio signal obtained by receiving a broadcast signal transferred via a transfer path including ground waves and satellite waves, said noise suppression apparatus comprising: a pattern data storage unit operable to store, in advance, plural spectrum patterns of the noise component that are determined for each electric field strength; a noise estimation unit operable to acquire data indicating the electric field strength of the received broadcast signal, read out a noise spectrum pattern corresponding to the electric field strength indicated by the acquired data from said pattern data storage unit, and estimate a noise component contained in the audio signal; a noise suppression unit operable to suppress the estimated noise component from the audio signal; a level calculation unit operable to calculate a noise level contained in an audio signal obtained by inputting a test signal instead of the broadcast signal, the test signal corresponding to a predetermined electric field strength; and a correction unit operable to correct an association between the noise spectrum pattern stored in said pattern data storage unit and the electric field strength using the noise level calculated by said level calculation unit, wherein said noise estimation unit is operable to read out the noise spectrum pattern according to the association corrected by said correction unit.