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UtilityBased Video Adaptation for Universal Multimedia Access (UMA) and Content-Based Utility Function Prediction for Real-Time Video Transcoding (2007)
| Content Provider | CiteSeerX |
|---|---|
| Author | Wang, Yong Kim, Jae-Gon Chang, Shih-Fu Kim, Hyung-Myung |
| Abstract | Abstract—Many techniques exist for adapting videos to satisfy heterogeneous resource conditions or user preferences, whereas selection of the best adaptation operation among various choices usually is either ad hoc or inefficient. To provide a systematic solu-tion, we present a conceptual framework based on utility function (UF), which models video entity, adaptation, resource, utility, and the relations among them. In order to support real-time video adaptation, we present a content-based statistical paradigm to facilitate the prediction of UF for real-time transcoding of live videos. Instead of modelling the UF through analytical models, as in the conventional rate-distortion framework, the proposed ap-proach formulates the prediction as a classification and regression problem. Each video clip is classified into one of distinctive cate-gories and then local regression is used to accurately predict the utility value. Our extensive experiment results based on MPEG-4 transcoding demonstrate that the proposed method achieves very promising performance—up to 89 % accuracy in choosing the optimal transcoding operation (in both spatial and temporal dimensions) with the highest quality over a diverse range of target bit rates. Index Terms—Content-based prediction, universal media access, utility function, video adaptation. I. |
| File Format | |
| Journal | IEEE Trans. Multimedia |
| Language | English |
| Publisher Date | 2007-01-01 |
| Access Restriction | Open |
| Subject Keyword | Video Adaptation Real-time Video Transcoding Universal Multimedia Access Content-based Utility Function Prediction Utility Function Heterogeneous Resource Condition Whereas Selection User Preference Optimal Transcoding Operation Promising Performance Real-time Transcoding Conventional Rate-distortion Framework Content-based Statistical Paradigm Adaptation Operation Temporal Dimension Conceptual Framework Systematic Solu-tion Ad Hoc Target Bit Rate Various Choice Abstract Many Technique Diverse Range Video Clip Real-time Video Adaptation Utility Value Analytical Model Extensive Experiment Result Index Term Content-based Prediction Local Regression Regression Problem Universal Medium Access Distinctive Cate-gories Live Video |
| Content Type | Text |
| Resource Type | Article |
