METHOD AND APPARATUS FOR OBTAINING PITCH GAIN, AND CODER AND DECODER
First Claim
1. A method for obtaining a pitch gain, the method comprising:
- obtaining signal information about an input signal; and
obtaining the pitch gain corresponding to the signal information about the input signal according to the correspondence between the signal information and the pitch gain.
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Abstract
The present invention relates to a method and apparatus for obtaining a pitch gain, and a coder and a decoder. The method includes: obtaining information about an input signal; and obtaining a pitch gain corresponding to the information about the input signal according to the correspondence between the signal information and the pitch gain. The embodiments of the present invention obtain the corresponding pitch gain according to the signal information by using the obtained correspondence between the signal information and the pitch gain, and the pitch gain is applicable to the coder and the decoder, thus making it unnecessary for the coder to transmit the pitch gain to the decoder and solving the problem of bit overhead. The embodiments of the present invention determine the pitch gain adaptively according to the signal information, avoid consumption of extra bits for quantizing the pitch gain, avoid impact on the coding performance, and improve the compression ratio.
38 Citations
18 Claims
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1. A method for obtaining a pitch gain, the method comprising:
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obtaining signal information about an input signal; and obtaining the pitch gain corresponding to the signal information about the input signal according to the correspondence between the signal information and the pitch gain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An apparatus for obtaining a pitch gain, the apparatus comprising:
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a signal information obtaining module, adapted to obtain signal information about an input signal; and a pitch gain obtaining module, adapted to obtain the pitch gain corresponding to the signal information about the input signal according to the correspondence between the signal information and the pitch gain. - View Dependent Claims (15, 16, 17)
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18. A method for obtaining a pitch gain, the method comprising:
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obtaining signal information about an input signal; determining the interval which the signal information about the input signal belongs to according to the signal information about the input signal, wherein the interval is an interval set in the region of the signal information, at least one interval is set in the region of the signal formation; and obtaining the pitch gain corresponding to interval which the signal information about the input signal belongs to as the pitch gain of the input signal.
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Specification