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: A packet-layer video quality assessment model with spatiotemporal complexity estimation | Liao and Chen EURASIP Journal on Image and Video Processing 2011 2011 5 http content 2011 1 5 D EURASIP Journal on Image and Video Processing a SpringerOpen Journal RESEARCH Open Access A packet-layer video quality assessment model with spatiotemporal complexity estimation Ning Liao and Zhibo Chen Abstract A packet-layer video quality assessment VQA model is a lightweight model that predicts the video quality impacted by network conditions and coding configuration for application scenarios such as video system planning and in-service video quality monitoring. It is under standardization in ITU-T Study Group SG 12. In this article we first differentiate the requirements for VQA model from the two application scenarios and state the argument that the dataset for evaluating the quality monitoring model should be more challenging than that for system planning model. Correspondingly different criteria and approaches are used for constructing the test datasets for system planning dataset-1 and for video quality monitoring dataset-2 respectively. Further we propose a novel video quality monitoring model by estimating the spatiotemporal complexity of video content. The model takes into account the interactions among content features the error concealment effectiveness and error propagation effects. Experiment results demonstrate that the proposed model achieves robust performance improvement compared with the existing peer VQA metrics on both dataset-1 and dataset-2. It is noted that on the more challenging dataset-2 for video quality monitoring we obtain a large increase in Pearson correlation from to and a decrease in the modified RMSE from to . Keywords video quality assessment quality of experience packet-layer model spatiotemporal complexity estimation 1. Introduction With the development of video service delivery over IP networks there is a growing interest in low-complexity no-reference video quality assessment VQA models
