发明授权
- 专利标题： Compensator and compensation method for audio frame loss in modified discrete cosine transform domain
- 专利标题（中）： 修正离散余弦变换域中音频帧丢失的补偿和补偿方法
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申请号： US13382725申请日： 2010-02-25
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公开(公告)号： US08731910B2公开(公告)日： 2014-05-20
- 发明人: Ming Wu , Zhibin Lin , Ke Peng , Zheng Deng , Jing Lu , Xiaojun Qiu , Jiali Li , Guoming Chen , Hao Yuan , Kaiwen Liu
- 申请人： Ming Wu , Zhibin Lin , Ke Peng , Zheng Deng , Jing Lu , Xiaojun Qiu , Jiali Li , Guoming Chen , Hao Yuan , Kaiwen Liu
- 申请人地址： CN Shenzhen, Guangdong Province
- 专利权人： ZTE Corporation
- 当前专利权人： ZTE Corporation
- 当前专利权人地址： CN Shenzhen, Guangdong Province
- 代理机构： Ling and Yang Intellectual Property
- 代理商 Ling Wu; Stephen Yang
- 优先权： CN200910158577 20090716
- 国际申请： PCT/CN2010/070740 WO 20100225
- 国际公布： WO2011/006369 WO 20110120
- 主分类号： G10L21/00
- IPC分类号： G10L21/00 ; G10L19/02 ; G10L19/00
摘要：
The invention provides a compensation method for audio frame loss in a MDCT domain, the method comprising: when a frame currently lost is a Pth frame, obtaining a set of frequencies to be predicted, and for each frequency in the set, using phases and amplitudes of a plurality of frames before a (P−1)th frame in a MDCT-MDST domain to predict a phase and an amplitude of the Pth frame, and using the predicted phase and amplitude to obtain a MDCT coefficient of the Pth frame at each corresponding frequency; for a frequency outside the set, using MDCT coefficients of a plurality of frames before the Pth frame to calculate a MDCT coefficient value of the Pth frame at the frequency; performing an IMDCT for the MDCT coefficients of the Pth frame to obtain a time domain signal of the Pth frame.
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