Patent ID: 6134522
Filing Date: 2000-10-17
Classification: G11B

Abstract:
A signal processing method for block-coded audio signals of a communications system, comprising the steps of:a) generating and buffer-storing a substitution signal which is correlated with the audio signal;b) determining at least one first, incorrectly transmitted signal section in the audio signal;c) replacing one signal sections of the audio signal by the substitution signal for a calculated replacement durationsd) producing a filter function; ande) suppressing substitution-dependent artefacts in the audio signal using the filter function, as a result of which the substitution-depended artefacts in the audio signal are filtered such that the audio signal, based on psycho-acoustic aspects, is substantially maintained, the filter function being effected by a time variant filter, in a digital signal processor which is adapted for smoothing sudden discontinuities that result from replacement of said one or more signal sections with said substitution signal as a function of said replacement duration.