PREDICTION METHOD AND CODING/DECODING DEVICE FOR HIGH FREQUENCY BAND SIGNAL

摘要

Embodiments of the present invention provide a method for predicting a high frequency band signal, an encoding device, and a decoding device. The method includes: acquiring a signal type of an audio signal and a low frequency band signal of the audio signal, where the audio signal includes the low frequency band signal and a high frequency band signal; acquiring a frequency envelope of the high frequency band signal according to the signal type; predicting an excitation signal of the high frequency band signal according to the low frequency band signal; and restoring the high frequency band signal according to the frequency envelope of the high frequency band signal and the excitation signal of the high frequency band signal. By using the technical solutions of the embodiments of the present invention, an error existing between a high frequency band signal obtained by prediction and an actual high frequency band signal can be effectively reduced, and an accuracy rate of the predicted high frequency band signal can be increased.