Noise filer, 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 has 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 has 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.

主权项

1. 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, the noise filler comprising:
a spectral region identifier configured to identify spectral regions of the input spectral representation which are quantized to zero and which are spaced from non-zero spectral regions of the input spectral representation by at least one intermediate spectral region, to acquire identified spectral regions; and a noise inserter configured to selectively introduce noise into the identified spectral regions to acquire the noise-filled spectral representation of the audio signal; wherein the noise filler is implemented using a hardware apparatus, or using a computer, or using a combination of a hardware apparatus and a computer.