AUDIO INFORMATION CREATION METHOD

摘要

PROBLEM TO BE SOLVED: To improve the perceived quality of audio signals obtained from audio coding systems by avoiding or reducing degradation related to zero-valued quantized spectrum components.

SOLUTION: Audio coding processes like quantization can cause spectral components of an encoded audio signal to be set to zero, creating spectral holes in the signal. These spectral holes can degrade the perceived quality of audio signals that are reproduced by audio coding systems. An improved decoder avoids or reduces the degradation by filling the spectral holes with synthesized spectral components. An improved encoder may also be used to realize further improvements in the decoder.

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