Method and apparatus for encoding and decoding high frequency signal
First Claim
1. A method of encoding a high frequency signal, the method comprising:
- extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient;
generating a signal by using the extracted coefficient and a low frequency signal; and
encoding the high frequency signal by calculating a ratio between an energy value of the high frequency signal and an energy value of the generated signal.
1 Assignment
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Accused Products
Abstract
Provided are a method and apparatus for encoding and decoding a high frequency signal by using a low frequency signal. The high frequency signal can be encoded by extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient, generating a signal by using the extracted coefficient and a low frequency signal, and encoding the high frequency signal by calculating a ratio between the high frequency signal and an energy value of the generated signal. Also, the high frequency signal can be decoded by decoding a coefficient, which is extracted by linear predicting a high frequency signal, and a low frequency signal, and generating a signal by using the decoded coefficient and the decoded low frequency signal, and adjusting the generated signal by decoding a ratio between the generated signal and an energy value of the high frequency signal.
27 Citations
25 Claims
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1. A method of encoding a high frequency signal, the method comprising:
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extracting a coefficient by linear predicting a high frequency signal, and encoding the coefficient; generating a signal by using the extracted coefficient and a low frequency signal; and encoding the high frequency signal by calculating a ratio between an energy value of the high frequency signal and an energy value of the generated signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of decoding a high frequency signal, the method comprising:
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decoding a coefficient, which is extracted by linear predicting a high frequency signal, and a low frequency signal, and generating a signal by using the decoded coefficient and the decoded low frequency signal; and adjusting the generated signal by decoding a ratio between an energy value the generated signal and an energy value of the high frequency signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method of decoding a high frequency signal, the method comprising:
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generating a first signal by decoding a coefficient, which is extracted by linear predicting a high frequency signal; extracting a residual signal by decoding and linear predicting a low frequency signal; generating a second signal by using the generated first signal and the extracted residual signal; and adjusting the generated second signal by decoding a gain, which is calculated by using the high frequency signal and the low frequency signal.
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Specification