The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2014
Filed:
Feb. 25, 2010
Ming Wu, Nanjing, CN;
Zhibin Lin, Nanjing, CN;
KE Peng, Shenzhen, CN;
Zheng Deng, Nanjing, CN;
Jing LU, Nanjing, CN;
Xiaojun Qiu, Nanjing, CN;
Jiali LI, Shenzhen, CN;
Guoming Chen, Shenzhen, CN;
Hao Yuan, Shenzhen, CN;
Kaiwen Liu, Shenzhen, CN;
Ming Wu, Nanjing, CN;
Zhibin Lin, Nanjing, CN;
Ke Peng, Shenzhen, CN;
Zheng Deng, Nanjing, CN;
Jing Lu, Nanjing, CN;
Xiaojun Qiu, Nanjing, CN;
Jiali Li, Shenzhen, CN;
Guoming Chen, Shenzhen, CN;
Hao Yuan, Shenzhen, CN;
Kaiwen Liu, Shenzhen, CN;
ZTE Corporation, Shenzhen, Guangdong Province, CN;
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 Pframe, 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)frame in a MDCT-MDST domain to predict a phase and an amplitude of the Pframe, and using the predicted phase and amplitude to obtain a MDCT coefficient of the Pframe at each corresponding frequency; for a frequency outside the set, using MDCT coefficients of a plurality of frames before the Pframe to calculate a MDCT coefficient value of the Pframe at the frequency; performing an IMDCT for the MDCT coefficients of the Pframe to obtain a time domain signal of the Pframe.