| US 7,552,048 B2 | ||
| Method and device for performing frame erasure concealment on higher-band signal | ||
| Jianfeng Xu, Shenzhen (China); Lei Miao, Shenzhen (China); Chen Hu, Shenzhen (China); Qing Zhang, Shenzhen (China); Lijing Xu, Shenzhen (China); Wei Li, Shenzhen (China); Zhengzhong Du, Shenzhen (China); Yi Yang, Shenzhen (China); Fengyan Qi, Shenzhen (China); Wuzhou Zhan, Shenzhen (China); and Dongqi Wang, Shenzhen (China) | ||
| Assigned to Huawei Technologies Co., Ltd., Shenzhen (China) | ||
| Filed on Nov. 18, 2008, as Appl. No. 12/273,391. | ||
| Application 12/273391 is a continuation of application No. 12/129118, filed on May 29, 2008. | ||
| Claims priority of application No. 2007 1 0153955 (CN), filed on Sep. 15, 2007; and application No. 2007 1 0194570 (CN), filed on Nov. 24, 2007. | ||
| Prior Publication US 2009/0076808 A1, Mar. 19, 2009 | ||
| Int. Cl. G10L 11/04 (2006.01); G10L 19/00 (2006.01) | ||
| U.S. Cl. 704—206 [704/500] | 19 Claims |
| 1. A method for performing a frame erasure concealment on a higher-band signal, comprising the steps of:
calculating a periodic intensity of the higher-band signal with respect to pitch period information of a lower-band signal
with at least one of an autocorrelation function and a normalized correlation function applied to a history buffer signal
of the higher-band signal of a current lost frame;
comparing the periodic intensity to a preconfigured threshold, if the periodic intensity is greater than or equal to the preconfigured
threshold, performing the frame erasure concealment on the higher-band signal of a current lost frame with a pitch period
repetition based method, otherwise performing the frame erasure concealment on the higher-band signal of the current lost
frame with a previous frame data repetition based method.
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