PREPROCESSING METHOD, PREPROCESSING APPARATUS AND CODING DEVICE
First Claim
1. A preprocessing method, comprising:
- obtaining characteristic information of a current frame signal;
identifying whether the current frame signal requires no coding operation of removing Long Term Correlation (LTC) according to the characteristic information of the current frame signal and preset information; and
if the current frame signal requires no coding operation of removing LTC, performing a coding operation of removing Short Term Correlation (STC) for the current frame signal;
if the current frame signal requires the coding operation of removing LTC, performing coding operations of removing both LTC and STC for the current frame signal.
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Accused Products
Abstract
The present disclosure relates to coding and decoding technologies, and discloses a preprocessing method, a preprocessing apparatus, and a coding device. The preprocessing method includes: obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing LTC according to the characteristic information of the current frame signal and preset information; and if identifying that the current frame signal requires no coding operation of removing LTC, performing the coding operation of removing STC for the current frame signal; and if identifying that the current frame signal requires the coding operation of removing LTC, performing the coding operations of removing both LTC and STC for the current frame signal. Through the technical solution provided herein, the coding operation of removing LTC is performed for only part of the input frame signals.
12 Citations
20 Claims
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1. A preprocessing method, comprising:
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obtaining characteristic information of a current frame signal; identifying whether the current frame signal requires no coding operation of removing Long Term Correlation (LTC) according to the characteristic information of the current frame signal and preset information; and if the current frame signal requires no coding operation of removing LTC, performing a coding operation of removing Short Term Correlation (STC) for the current frame signal;
if the current frame signal requires the coding operation of removing LTC, performing coding operations of removing both LTC and STC for the current frame signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A preprocessing apparatus, comprising:
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an obtaining unit, configured to obtain characteristic information of a current frame signal; an identifying unit, configured to identifying whether the current frame signal requires no coding operation of removing Long Term Correlation (LTC) according to the characteristic information of the current frame signal obtained by the obtaining unit and preset information; and an operating unit, configured to perform coding operations of removing both LTC and Short Term Correlation (STC) for the current frame signal if the identifying unit identifies that the current frame signal requires the coding operation of removing LTC;
or perform the coding operation of removing STC for the current frame signal if the identifying unit identifies that the current frame signal requires no coding operation of removing LTC. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A coding device, comprising:
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a preprocessing apparatus, configured to obtain characteristic information of a current frame signal;
identify whether the current frame signal requires no coding operation of removing Long Term Correlation (LTC) according to the characteristic information of the current frame signal and preset information;
perform a coding operation of removing Short Term Correlation (STC) for the current frame signal if the current frame signal requires no coding operation of removing LTC, or perform coding operations of removing both LTC and STC for the current frame signal if the current frame signal requires the coding operation of removing LTC; andan entropy coding apparatus, configured to perform entropy coding for the current frame signal by using a result of the coding operation. - View Dependent Claims (17, 18, 19, 20)
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Specification