Bit allocation device for transformed digital audio broadcasting signals with adaptive quantization based on psychoauditive criterion
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United States of America Patent
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Feb 9, 1993
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app pub date -
Jun 24, 1992
filing date -
Oct 13, 1989
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Abstract
A device for compressing a digital audio signal, includes a device for allocating bits available for the transmission or storage of the signal, controlling means for the adaptive quantization of the signal, in order to enable a major reduction in the bit rate while at the same time preserving the quality of the starting signal to the maximum extent. The device includes means for allocating a specific number of bits for the expression of the coefficients of each frequency band of a transformed digital audio signal, as a function of a piece of auxiliary information corresponding to a description of the spectrum of the signal, said device being informed by means for the prior elimination of spectral components of said transformed signal as a function of a psychoauditive criterion.
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