Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Error-Resilient Unequal Error Protection of Fine Granularity Scalable Video Bitstreams | Hindawi Publishing Corporation EURASIP Journal on Applied Signal Processing Volume 2006 Article ID 45412 Pages 1-11 DOI ASP 2006 45412 Error-Resilient Unequal Error Protection of Fine Granularity Scalable Video Bitstreams Hua Cai 1 Bing Zeng 2 Guobin Shen 1 Zixiang Xiong 3 and Shipeng Li1 1 Microsoft Research Asia Haidian District Beijing 100080 China 2 Department of Electrical and Electronic Engineering TheHongKong University of Science and Technology Clear Water Bay Kowloon HKSAR China 3 Department of Electrical Engineering Texas A M University College Station TX 77843 USA Received 12 August 2005 Revised 9 March 2006 Accepted 30 April 2006 This paper deals with the optimal packet loss protection issue for streaming the fine granularity scalable FGS video bitstreams over IP networks. Unlike many other existing protection schemes we develop an error-resilient unequal error protection ER-UEP method that adds redundant information optimally for loss protection and at the same time cancels completely the dependency among bitstream after loss recovery. In our ER-UEP method the FGS enhancement-layer bitstream is first packetized into a group of independent and scalable data packets. Parity packets which are also scalable are then generated. Unequal protection is finally achieved by properly shaping the data packets and the parity packets. We present an algorithm that can optimally allocate the rate budget between data packets and parity packets together with several simplified versions that have lower complexity. Compared with conventional UEP schemes that suffer from bit contamination caused by the bit dependency within a bitstream our method guarantees successful decoding of all received bits thus leading to strong error-resilience at any fixed channel bandwidth and high robustness under varying and or unclean channel conditions . Copyright 2006 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION Streaming multimedia contents over the Internet
