DocumentCode :
2206452
Title :
Semantic Video Adaptation using a Preprocessing Method for Mobile Environment
Author :
Huang, Hong-Jie ; Zhang, Xing-Ming ; Xu, Zhi-Wei
Author_Institution :
Dept. of Comput. Sci. & Eng., South China Univ. of Technol., Guangzhou, China
fYear :
2010
fDate :
June 29 2010-July 1 2010
Firstpage :
2806
Lastpage :
2810
Abstract :
Video adaptation is critical for video encoding and streaming in mobile environment. Semantic video adaptation takes into account the degree of relevance of different part of the image and tries to adapt video content to meet wireless channel constraint. Making assumption that only changing region of the video is important to mobile user, we propose a real-time semantic level adaptation technique based on video preprocessing. Firstly moving foreground of a video frame is segmented from background scene. Then a low-pass filter is applied to the background of the video frame before it is encoded. By this way, background is blurred and video encoder is forced to allocate more bit rate to foreground part of the frame than the background thus improves the quality of semantically significant portion of the image. To improve robustness a user feedback strategy is employed enabling user to choose the degree of background blurring according their preferences. The simulation result shows that the proposed method improves the quality of encoded video by both subjective and objective measurement.
Keywords :
low-pass filters; video coding; video streaming; wireless channels; background blurring; low-pass filter; mobile environment; mobile user; semantic video adaptation; video encoding; video frame; video preprocessing; video segmentation; video streaming; wireless channel constraint; Bit rate; Computer vision; Encoding; Mobile communication; Pixel; Semantics; Streaming media; encoding; motion segmentation; multimedia; video adaptation;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Computer and Information Technology (CIT), 2010 IEEE 10th International Conference on
Conference_Location :
Bradford
Print_ISBN :
978-1-4244-7547-6
Type :
conf
DOI :
10.1109/CIT.2010.468
Filename :
5578553
Link To Document :
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