Method and apparatus for encoding and decoding high frequency signal

摘要

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.

主权项

1. An apparatus for encoding a high band signal, the apparatus comprising:
a processor configured:
to extract a coefficient from linear prediction of a high band signal, and to encode the extracted coefficient;to generate a signal based on a low band signal and the extracted coefficient; andto obtain a gain from an energy value of the high band signal and an energy value of the generated signal and to encode the gain; and an output unit configured to transmit the encoded coefficient and the encoded gain to a decoder, wherein the processor is configured to encode the extracted coefficient by performing an interpolation process on the extracted coefficient.