Method and apparatus for encoding and decoding noise signal
AssigneeSamsung Electronics Co., Ltd.
InventorsEun-mi Oh, Anton Porov, Jung-hoe Kim
Life of this patent
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Abstract
Provided is a method and apparatus for encoding/decoding an audio signal. Sections which are not used to output noise components near important spectral components and sub-bands which are not used to output noise components, are determined to be encoded or decoded, so that the efficiency of encoding and decoding an audio signal increases, and sound quality can be improved using less bits.
Claims13
A method of encoding a noise signal by extracting spectral components from a signal converted into a frequency signal to be encoded and encoding remaining noise signals, the method comprising:
- calculating, by at least one processing device, noise levels for noise components in units of a sub-band;
- comparing an energy value of each of the extracted spectral components with each of the calculated noise levels;
- and
- calculating lengths of sections which are not to output noise components near each of the extracted spectral components by using the result of the comparing.
A method of decoding a noise signal by extracting spectral components from a signal converted into a frequency signal to be encoded and decoding remaining noise signals, the method comprising:
- decoding, by at least one processing device, information on spectral components selected as spectral components which are not to be output as noise components corresponding to predetermined sections provided near the spectral components, the predetermined sections being determined by comparing an energy value of each of the extracted spectral components with each of noise levels in an encoding part;
- and
- decoding noise components by using the noise levels, except for the predetermined sections provided near each of the selected spectral components.
A method of decoding a noise signal by extracting spectral components from a signal converted into a frequency signal to be encoded and decoding remaining noise signals, the method comprising:
- decoding, by at least one processing device, information on lengths of sections which are not to output noise components near each of the extracted spectral components, the sections being determined by comparing an energy value of each of the extracted spectral components with each of noise levels in an encoding part;
- and
- decoding noise components by using the noise levels, except for the noise components corresponding to the lengths of the sections provided near each of the spectral components.
A method of decoding an audio signal, comprising:
- decoding spectral components encoded in an encoding apparatus;
- decoding, by at least one processing device, noise components;
- comparing each of the decoded spectral components with each of the decoded noise components;
- selecting spectral components which are not to be output as noise components corresponding to predetermined sections provided near spectral components by using the result of the comparing;
- and
- synthesizing the decoded spectral components with the noise components, except for the predetermined sections provided near the selected spectral components.
A method of decoding an audio signal, comprising:
- decoding spectral components encoded in an encoding apparatus;
- decoding, by at least one processing device, noise components;
- comparing each of the decoded spectral components with each of the decoded noise components;
- calculating lengths of sections which are not to output noise components near each of the decoded spectral components by using the result of the comparing;
- and
- synthesizing the decoded spectral components with noise components excluding sections corresponding to the calculated lengths which are not to output noise components near the calculated spectral components.
Dependencies are inferred from the claim text.