Browse > Article

A Dynamic Video Adaptation Scheme based on Size and Quality Predictions  

Kim Jonghang (LG전자 홈넷사업팀)
Nang Jongho (서강대학교 컴퓨터학과)
Publication Information
Journal of KIISE:Computer Systems and Theory / v.32, no.2, 2005 , pp. 95-105 More about this Journal
Abstract
This paper proposes a new dynamic video adaptation scheme that could generate an adapted video stream customized to the requesting mobile device and current network status without repeated decode-encode cycles. In the proposed adaptation scheme, the characteristics of the video codec such as MPEG-1/-2/-4 are analyzed in advance focused on the relationships between the size and Quality of the encoded video stream, and they are stored in the proxy as a codec-dependent characteristic table. When a mobile device requests a video stream, it is dynamically decoded-encoded in the proxy with the highest quality to extract the contents-dependent attributes of the requested video stream. By comparing these attributes with codec-dependent characteristic table, the size and Quality of the requested video stream when being adapted to the target mobile device could be predicted. With this prediction, a version of adapted video stream, that meets the size constraints of mobile device while keeping the quality of encoded video stream as high as possible, could be selected without repeated decode-encode cycles. Experimental results show that the errors in our proposed scheme are less than 5% and produce an appropriate adapted video stream very quickly. It could be used t(1 build a proxy server for mobile devices that could quickly transcode the video streams widely spread in Internet which are encoded with various video codecs.
Keywords
Video Adaptation; Wireless Multimedia; Prediction of Video Quality; Video for Mobile Devices;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Yong Wang, Jae-Gon Kim, Shih-Fu Chang, 'Content- Based Utility Function Prediction for Real-Time MPEG-4 Video Transcoding.' Proceedings of ICIP'2003, Barcelona, Spain, Sep., 2003, pp. 14-17
2 Thrasyvoulos N. Pappas, 'Perceptual Criteria for Image Quality Evaluation,' in Handbook of Image and Video Processing, Academic Press, San Diego, 2000, pp, 669-684
3 Christoph Kuhmunch, Gerald Kuhne, Claudia Sch-remmer and Thomas Haenselmann, 'Video-Scaling Algorithm Based on Human Perception for Spatio-Temporal Stimuli,' Proceedings of SPIE, Multimedia Computing and Networking, vol. 4312, San Jose, California, USA, Jan., 2001, pp. 13-24   DOI
4 Ingo Elsen, Frank Hartung, Uwe Horn, Markus Kampmann and Liliane Peters, 'Streaming Technology in 3G Mobile Communication Systems,' IEEE Computer Magazine, Vol. 34 Issue: 9, Sep. 2001 pp. 46-52   DOI   ScienceOn
5 Zhijun Lei and Nicolas D. Georganas, 'Context-based Media Adaptation in Pervasive Computing,' Proceedings of Canadian Conference on Electrical and Computer Engineering (CCECE 2001), Toronto, May 2001   DOI
6 Margaritis Margaritidis and George C. Polyzos, 'Adaptation Techniques for Ubiquitous Internet Multimedia,' Wireless Communications and Mobile Computing, Vol. 1, no. 2, April-June, 2001, pp, 141-63   DOI   ScienceOn
7 Jae-Gon Kim, Yong Wang, Shih-Fu Chang 'Content-Adaptive Utility-Based Video Adaptation,' Proceedings of IEEE ICME'2003, Vol. 3, Baltimore, MD, USA, July, 2003, pp. 281-284