Download Advances in Multimedia Information Processing - PCM 2008: by Jozef à korupa, Jürgen Slowack, Stefaan Mys, Peter Lambert, PDF

By Jozef à korupa, Jürgen Slowack, Stefaan Mys, Peter Lambert, Rik Van de Walle (auth.), Yueh-Min Ray Huang, Changsheng Xu, Kuo-Sheng Cheng, Jar-Ferr Kevin Yang, M. N. S. Swamy, Shipeng Li, Jen-Wen Ding (eds.)

This e-book constitutes the refereed court cases of the ninth Pacific Rim convention on Multimedia, PCM 2008, held in Tainan, Taiwan, in December 2008.

The seventy nine revised complete papers and 39 revised poster awarded have been conscientiously reviewed and chosen from 210 submissions. The papers are prepared in topical sections on subsequent iteration video coding ideas, audio processing and type, interactive multimedia structures, advances in H.264/AVC, multimedia networking concepts, complicated picture processing concepts, video research and its purposes, picture detection and category, visible and spatial analyses, multimedia human machine interfaces, multimedia safety and DRM, complex snapshot and video processing, multimedia database and retrieval, multimedia administration and authoring, multimedia personalization, multimedia for e-learning, multimedia networking thoughts, multimedia structures and functions, complex multimedia concepts, in addition to multimedia processing and analyses.

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Additional resources for Advances in Multimedia Information Processing - PCM 2008: 9th Pacific Rim Conference on Multimedia, Tainan, Taiwan, December 9-13, 2008. Proceedings

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The phenomenon indicates that the distribution of pixels in current block is complex; the region is most likely in the motion region or in the border of the object, where human eyes are more sensibility. Suppose that the average of the current macroblock is JNDavg ( x, y ) , and then the variance and the average of this macroblock can be denoted as follows: 34 E. Zhang et al. JNDavg (x, y ) = JNDvar ( x, y ) = 1 15 15 ∑∑ JND(16 × y + j,16 × x + i ) 16 × 16 j =0 i=0 1 15 15 ∑∑ (JND(16 × y + j,16 × x + i ) − JNDavg (x, y )) m × n j =0 i =0 (3) (4) m × n is the number of the blocks in the current frame.

Where the “Propose” curve indicate the effect compressed by the proposed method, and the “Fovea” curve indicate the effect compressed by the traditional method. The experiment result illustrate the proposed method can reduce the bit rate up to 40% while the similar SSIM value can get. To further demonstrate the validity of the proposed method, we have obtained the filters of each macorblock in the second frame of bus sequence, which is depicted in Figure 3. In this figure, different numbers represent different intensity of the filters, and the filter with the smaller intensity takes the larger numbers.

Because each MB has four 8×8 blocks, if the current MB is encoded by Intra prediction, each 8×8 block may has different Intra modes compared to that encoded by Inter prediction which applies only one Inter mode to the whole MB. So, the combination probability of Intra mode and Inter mode is considered for each 8×8 block. P frame coding with group of picture (GoP) size 20, 2 reference frames and search range [−32,32] are used to test 6 sequences in CIF (352 × 288, 30fps, 100 frames), as Foreman, Football, News, Paris, Mobile and Tempete, and 6 sequences in 720p (1280 × 720, 60fps, 200 frames), as Harbour, Crew, City, Spincalendar, ShuttleStart and Sheriff under bitrates of 192K, 384K, 512K and 768K for CIF and 4M, 8M, 10M and 15M for 720p, respectively.

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