Noise cancellation controlled predominantly multiplicative signals in space time frequency

摘要

This invenu00c7u00c3o consists of a process to cancel noise embedded in the audio signal predominantly multiplicative, taking into account the characterisation, specified by the user, the audio signal in time frequency representation.The invenu00c7u00c3o allows, based on audio signals (5) of a medium (1) acquired by the acquisition instrument (2) to a computer (3), after calculated its time frequency representation (6) and made available (4) spectrogram.The user carries out the identification of the sub space of time - frequency to be considered as mostly noise (7) and the establishment of the degree of tolerance to the cancellation of noise (11) to achieve the isolation controlled noise (8, 9, Lo).The removal of noise from the original signal in time - frequency field (12) and calculation of the density of power of the signal post cancellation of noise (13), presenting to the user the threshold minimum power of the signal without the noise cancel (14, 15) and the percentage of noise canceled relativamen The original signal (16).