Báo cáo hóa học: "Research Article Anthropocentric Video Segmentation for Lecture Webcasts" potx

... Corporation EURASIP Journal on Image and Video Processing Volume 2008, Article ID 195743, 10 pages doi:10.1155/2008/195743 Research Article Anthropocentric Video Segmentation for Lecture Webcasts Gerald Friedland 1 and ... played back as MPEG-4 video. for the student. There are, however, several reasons against showing a video of the lecturer next to slides or the black-...

Ngày tải lên: 22/06/2014, 06:20

... depicted in Figure 4. While video coding with side information has been stud- ied extensively for enabling low-complexity video encoding, a significant interest to use these techniques for flexible decod- ing ... Corporation EURASIP Journal on Image and Video Processing Volume 2009, Article ID 683820, 18 pages doi:10.1155/2009/683820 Research Article Parity Bit Replenishment for...

Ngày tải lên: 21/06/2014, 20:20

... ratios for P e ∈{0.03, 0.05, 0.1, 0.2 } and R C ∈{500, 750, 1000, 1500, 2000, 2500 (kbps) } for Rena”videoandR C ∈{1000, 1500, 2000, 2500, 3000, 3500 (kbps) } for “Soccer” video. Thus, we perform ... rates for the defined layers. We evaluated the performance of the system via simu- lations where we used two stereoscopic videos “Rena” and “Soccer,” which have different video characteri...

Ngày tải lên: 21/06/2014, 22:20

... Processing Volume 2008, Article ID 657032, 11 pages doi:10.1155/2008/657032 Research Article Joint Video Summarization and Transmission Adaptation for Energy-Efficient Wireless Video Streaming Zhu ... consumption rate for encoding and transmitting video bit streams. Therefore, how to achieve reliable video communications over a fading channel with energy efficiency is crucial fo...

Ngày tải lên: 21/06/2014, 22:20

... transform domain scrambling of regions of interest in a video sequence. A pioneering work was done by Zhang et al. [10]. They proposed a method for storing original privacy information in video ... obtained by DWT for the region. Finally, the extracted privacy information and region information are embedded into the surveillance video using the amplitude modulo modulation-based info...

Ngày tải lên: 22/06/2014, 00:20

... literature for transform domain WZ video coding, this paper will propose an efficient and effective dynamic solution to guarantee a target uniform video quality for transform domain WZ video coding. ... constant quality for transform domain WZ video coding. In [5], Morb ´ ee et al. propose an encoder rate allocation algorithm for a Stanford-like pixel domain WZ video codec. Fo...

Ngày tải lên: 22/06/2014, 01:20

... compli- ance and format compliance. In lossy transform-based coding of digital images and video frames, typically a block of pixels undergoes the trans- formation such as DCT or wavelet. For instance, ... specific video com- pression framework. Conventional encryption is designed for generic data, and as such, it does not support many spe- cific video application requirements. For i...

Ngày tải lên: 22/06/2014, 19:20

... 4, is used for classification in our implementation. Therefore, 8 bits are needed for ADRC coding, since 1 bit can be saved by bitinversion [15]. For the activity measure, we use 2 bits for local ... re- quires 12 bits for ADRC and 4 bits for relative position cod- ing. The drawback of this method is that block grid positions are not always available, especially for scaled materi...

Ngày tải lên: 22/06/2014, 19:20

... error concealment for video. In Section 3, we briefly describe the channel models used and provide the performance analysis for the coded and uncoded systems employing nonuniform MPSK over Rician slow-fading ... either uniform QPSK or uniform 8-PSK without channel coding. (2) A 2-layer system using nonuniform 8-PSK without channel coding. (3) A single-layer system using either uniform QP...

Ngày tải lên: 22/06/2014, 19:20

... 2008, Article ID 380210, 8 pages doi:10.1155/2008/380210 Research Article Active Video Surveillance Based on Stereo and Infrared Imaging Gabriele Pieri and Davide Moroni Institute of Information ... R&D Department at TD Group S.p.A., for his support and for al- lowing the use of proprietary instrumentation for test pur- poses. We would also like to thank the anonymous referee...

Ngày tải lên: 22/06/2014, 19:20