Patent ID: 7430255

Claim:
An impulse noise suppressing apparatus comprising: impulse noise suppressing means judging, when in operation, an inputted digital audio data piece to be impulse noise when the level of said inputted digital audio data piece is dominant to the levels of preceding and succeeding inputted digital audio data pieces, and suppressing said inputted digital audio data piece judged to be impulse noise; error detecting means receiving said digital audio data pieces successively and detecting whether or not the inputted digital audio data pieces contain an error by the use of the parity check technique, the BCH code technique, or the Reed-Solomon technique, or a combination thereof; and operating means responsive to detection of an error by said error detecting means for operating said impulse noise suppressing means only after detection of the error by said error detecting means and then for a predetermined time period thereafter longer than a presumed time period during which a burst error ts occurring in the respective digital audio data pieces, wherein said predetermined time period is set such that said impulse noise suppressing means stops operating as soon as the burst errors terminate.