標題: Robust Video Coding Based on Hybrid Hierarchical B Pictures
作者: Tsai, Wen-Jiin
Sun, Yu-Chen
Chiu, Po-Jui
資訊工程學系
Department of Computer Science
關鍵字: Error concealment;error-resilient coding;hierarchical B pictures;hybrid model
公開日期: 1-May-2014
摘要: Compressed video streams transmitted over error-prone environments are usually corrupted by transmission errors. Error-concealment techniques can be used to recover the lost information. In this paper, a hybrid model is proposed to improve the error-concealment performance. The model combines two hierarchical B-picture coding structures such that key-frames, reference B frames, or even nonreference B frames have buddy frames to serve as their data recovery frames when they are lost. With buddy frames, the distance between a lost frame and its recovering frame can be substantially reduced. In addition, an improved estimation method is also proposed to further increase the accuracy of recovering motion. Error-concealment performance can thus be significantly improved with little bitrate redundancy. We have conducted experiments to compare its performance with other methods, and the results show that the proposed hybrid model outperforms these competed methods. The advantages of the proposed hybrid model are demonstrated in error-free and packet-loss environments.
URI: http://dx.doi.org/10.1109/TCSVT.2013.2291280
http://hdl.handle.net/11536/24458
ISSN: 1051-8215
DOI: 10.1109/TCSVT.2013.2291280
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY
Volume: 24
Issue: 5
起始頁: 878
結束頁: 888
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