Methods and systems for perceptual spectral decoding
First Claim
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1. A method for perceptual spectral decoding, comprising the steps of:
- decoding spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients;
spectrum filling said initial set of spectral coefficients into a set of reconstructed spectral coefficients, said spectrum filling comprising noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients not being decoded from said binary flux equal to elements derived from said decoded spectral coefficients; and
converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain.
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Abstract
A method for perceptual spectral decoding includes decoding of spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients. The initial set of spectral coefficients are spectrum filled. The spectrum filling includes noise filling of spectral holes by setting spectral coefficients in the initial set of spectral coefficients not being decoded from the binary flux equal to elements derived from the decoded spectral coefficients. The set of reconstructed spectral coefficients of a frequency domain formed by the spectrum filling is converted into an audio signal of a time domain.
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Citations
32 Claims
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1. A method for perceptual spectral decoding, comprising the steps of:
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decoding spectral coefficients recovered from a binary flux into decoded spectral coefficients of an initial set of spectral coefficients; spectrum filling said initial set of spectral coefficients into a set of reconstructed spectral coefficients, said spectrum filling comprising noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients not being decoded from said binary flux equal to elements derived from said decoded spectral coefficients; and converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for signal handling in perceptual spectral decoding, comprising the steps of:
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obtaining decoded spectral coefficients of an initial set of spectral coefficients; spectrum filling said initial set of spectral coefficients into a set of reconstructed spectral coefficients, said spectrum filling comprising noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients having a zero magnitude or being non-decoded equal to elements derived from said decoded spectral coefficients; and outputting said set of reconstructed spectral coefficients;
converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain.
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17. A perceptual spectral decoder, comprising:
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an input for a binary flux; a spectral coefficient decoder arranged for decoding spectral coefficients recovered from said binary flux into decoded spectral coefficients of an initial set of spectral coefficients; a spectrum filler connected to said spectral coefficient decoder and arranged for spectrum filling said set of spectral coefficients, said spectrum filler comprising a noise filler for noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients not being decoded from said binary flux equal to elements derived from said decoded spectral coefficients; a converter connected to said spectrum filler and arranged for converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain; and an output outputting for said audio signal. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A signal handling device for use in a perceptual spectral decoder, comprising:
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an input for decoded spectral coefficients of an initial set of spectral coefficients; a spectrum filler connected to said input and arranged for spectrum filling of said initial set of spectral coefficients into a set of reconstructed spectral coefficients, said spectrum filler comprising a noise filler for noise filling of spectral holes by setting spectral coefficients in said initial set of spectral coefficients having a zero magnitude or being non-decoded equal to elements derived from said decoded spectral coefficients; and an output for said set of reconstructed spectral coefficients;
converting said set of reconstructed spectral coefficients of a frequency domain into an audio signal of a time domain.
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Specification