tailieunhanh - Báo cáo hóa học: "Research Article Content-Based Distortion Control Scheme for High-Quality Wireless Multimedia Servicesg"

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: Research Article Content-Based Distortion Control Scheme for High-Quality Wireless Multimedia Services | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2008 Article ID 902592 7 pages doi 2008 902592 Research Article Content-Based Distortion Control Scheme for High-Quality Wireless Multimedia Services Chang Sun 1 Hong-Jun Wang 1 2 Seoksoo Kim 3 Young-Sil Kim 4 Seung-youn Lee 5 and Xin-Bo Yu1 1 School of Information Science and Engineering Shandong University Jinan 250100 China 2 School of Electronic and Information Engineering Tianjin University Tianjin 300072 China 3 Department of Multimedia Engineering Hannam University Daejeon 306791 South Korea 4 Department of Computer Science and Information Daelim College Anyang 431715 South Korea 5 Department of Electrical Information Control Dong Seoul College Seongnam 461714 South Korea Correspondence should be addressed to Chang Sun Received 24 January 2008 Accepted 15 April 2008 Recommended by Jong Hyuk Park In recent years the wireless mobile markets are witnessing an unprecedented growth. High-quality video service will be greatly needed as one of the hottest wireless multimedia services in the future generation wireless networks. In this paper a novel contentbased distortion control scheme is proposed to provide higher quality of the wireless video services. Our scheme adopts ratedistortion optimization techniques in state-of-the-art video coding standard AVC. In order to improve the subjective video quality in the process of encode we create three visual distortion sensitivity models to minimize the perceptual distortion. We arrange more bits to visual distortion sensitive macroblocks during rate-distortion optimization process. The perceptual distortion in these regions is thus efficiently controlled with a relatively higher rate. Meanwhile rate balance is achieved by allotting fewer bits to macroblocks that are perceptually less sensitive to distortion. Experiments results show that the subjective qualities of encoded video are .