By Ling Shao, Hui Zhang, Yan Liu (auth.), Kuo-Tien Lee, Wen-Hsiang Tsai, Hong-Yuan Mark Liao, Tsuhan Chen, Jun-Wei Hsieh, Chien-Cheng Tseng (eds.)
This two-volume complaints constitutes the refereed papers of the seventeenth foreign Multimedia Modeling convention, MMM 2011, held in Taipei, Taiwan, in January 2011. The fifty one revised usual papers, 25 particular consultation papers, 21 poster consultation papers, and three demo consultation papers, have been rigorously reviewed and chosen from 450 submissions. The papers are equipped in topical sections on audio, photograph video processing, coding and compression; media content material searching and retrieval; multi-camera, multi-view, and 3D structures; multimedia indexing and mining; multimedia content material research; multimedia sign processing and communications; and multimedia purposes. The specific consultation papers take care of content material research for human-centered multimedia functions; huge scale wealthy media information administration; multimedia knowing for shopper electronics; snapshot item attractiveness and compression; and interactive picture and video search.
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Additional info for Advances in Multimedia Modeling: 17th International Multimedia Modeling Conference, MMM 2011, Taipei, Taiwan, January 5-7, 2011, Proceedings, Part I
However in SSIM metric, our scheme gets better results. That means our scheme gets better perceptual visual quality. 500 , involving 12 naive evaluators. The result is shown in Figure 3. 2. Two obvious features should be mentioned. Firstly, the quality improvement is larger in lower bandwidth than in higher bandwidth. Secondly, in scenes with large range of texture variation (like flower_garden), the quality enhancement tends to be larger. Fig. 3. Results of subjective tests Figure 4 is a more detailed subjective quality comparison.
The ﬁrst mode is generally selected by an encoder in case of signiﬁcant detail, whereas the Intra 16×16 mode is preferred for smooth areas. 264/AVC, Intra 8×8 will also be selected and mainly replace Intra 4×4 modes to code the high-textured areas. As the subdivision in diﬀerent macroblock partitions roughly reﬂects the detail of the content, comparing the distribution of two frames can be used to estimate the spatial dissimilarities, as illustrated in Fig. 1. Comparing the current I frame with the previous I frame is not recommended as the content can change signiﬁcantly between these two intra-coded frames.
The DC coeﬃcient, and motion vectors. Based on these DC images, similarity metrics deﬁned for color features in the pixel domain can be modiﬁed to operate in the compressed domain. On the other hand, the distribution of the diﬀerent macroblock types and motion information [4,11] can also be used as features to detect shot boundaries. When an abrupt transition occurs between two successive P pictures, it is expected that a signiﬁcant amount of macroblocks in the second frame is intra coded since these macroblocks cannot be predicted well from prior reference frames.
Advances in Multimedia Modeling: 17th International Multimedia Modeling Conference, MMM 2011, Taipei, Taiwan, January 5-7, 2011, Proceedings, Part I by Ling Shao, Hui Zhang, Yan Liu (auth.), Kuo-Tien Lee, Wen-Hsiang Tsai, Hong-Yuan Mark Liao, Tsuhan Chen, Jun-Wei Hsieh, Chien-Cheng Tseng (eds.)