发明申请
- 专利标题： Method for Predicting High Frequency Band Signal, Encoding Device, and Decoding Device
- 专利标题（中）： 预测高频带信号，编码装置和解码装置的方法
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申请号： US14808145申请日： 2015-07-24
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公开(公告)号： US20150332699A1公开(公告)日： 2015-11-19
- 发明人: Zexin Liu , Lei Miao , Fengyan Qi
- 申请人： Huawei Technologies Co., Ltd.
- 优先权： CN201310033625.3 20130129
- 主分类号： G10L19/20
- IPC分类号： G10L19/20 ; G10L21/038
摘要：
A method includes obtaining 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; obtaining 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.
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