Invention Grant
- Patent Title: Compensator and compensation method for audio frame loss in modified discrete cosine transform domain
- Patent Title (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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Application No.: US13382725Application Date: 2010-02-25
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Publication No.: US08731910B2Publication Date: 2014-05-20
- Inventor: Ming Wu , Zhibin Lin , Ke Peng , Zheng Deng , Jing Lu , Xiaojun Qiu , Jiali Li , Guoming Chen , Hao Yuan , Kaiwen Liu
- Applicant: Ming Wu , Zhibin Lin , Ke Peng , Zheng Deng , Jing Lu , Xiaojun Qiu , Jiali Li , Guoming Chen , Hao Yuan , Kaiwen Liu
- Applicant Address: CN Shenzhen, Guangdong Province
- Assignee: ZTE Corporation
- Current Assignee: ZTE Corporation
- Current Assignee Address: CN Shenzhen, Guangdong Province
- Agency: Ling and Yang Intellectual Property
- Agent Ling Wu; Stephen Yang
- Priority: CN200910158577 20090716
- International Application: PCT/CN2010/070740 WO 20100225
- International Announcement: WO2011/006369 WO 20110120
- Main IPC: G10L21/00
- IPC: G10L21/00 ; G10L19/02 ; G10L19/00
Abstract:
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.
Public/Granted literature
- US20120109659A1 Compensator and Compensation Method for Audio Frame Loss in Modified Discrete Cosine Transform Domain Public/Granted day:2012-05-03
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