NOISE FILLER, NOISE FILLING PARAMETER CALCULATOR ENCODED AUDIO SIGNAL REPRESENTATION, METHODS AND COMPUTER PROGRAM

摘要

A NOISE FILLER FOR PROVIDING A NOISE-FILLED SPECTRAL REPRESENTATION OF AN AUDIO SIGNAL ON THE BASIS OF AN INPUT SPECTRAL REPRESENTATION OF THE AUDIO SIGNAL COMPRISES A SPECTRAL REGION IDENTIFIER CONFIGURED TO IDENTIFY SPECTRAL REGIONS OF THE INPUT SPECTRAL REPRESENTATION SPACED FROM NON-ZERO SPECTRAL REGIONS OF THE INPUT SPECTRAL REPRESENTATION BY AT LEAST ONE INTERMEDIATE SPECTRAL REGION, TO OBTAIN IDENTIFIED SPECTRAL REGIONS, AND A NOISE INSERTER CONFIGURED TO SELECTIVELY INTRODUCE NOISE INTO THE IDENTIFIED SPECTRAL REGIONS TO OBTAIN THE NOISE-FILLED SPECTRAL REPRESENTATION OF THE AUDIO SIGNAL. A NOISE FILLING PARAMETER CALCULATOR FOR PROVIDING A NOISE FILLING PARAMETER ON THE BASIS OF A QUANTIZED SPECTRAL REPRESENTATION OF AN AUDIO SIGNAL COMPRISES A SPECTRAL REGION IDENTIFIER, AS MENTIONED ABOVE, AND A NOISE VALUE CALCULATOR CONFIGURED TO SELECTIVELY CONSIDER QUANTIZATION ERRORS OF THE IDENTIFIED SPECTRAL REGIONS FOR A CALCULATION OF THE NOISE FILLING PARAMETER. ACCORDINGLY, AN ENCODED AUDIO SIGNAL REPRESENTATION REPRESENTING THE AUDIO SIGNAL CAN BE OBTAINED. (FIG. 1)