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19th Color and Imaging Conference - Color Science and Engineering Systems, technologies, and Applications

作者： Chalmers, Alan Debattista, Kurt Univ Warwick WMG Digital Coventry CV4 7AL W Midlands England GoHDR Ltd Walsall W Midlands England

ISBN: (纸本)9780892082971

High Dynamic Range (HDR) video offers the possibility, for the first time, of capturing, storing, manipulating, and displaying dynamic real-world lighting. This gives a step change in viewing experience, for example the ability to clearly see the football when it is kicked from the shadow of the stadium into sunshine. An HDR video camera now exists which is capable of capturing 20 f-stops at full HD resolution (1920 x 1080) at 30 frames per second and commercial HDR displays are available. However, there are many significant challenges that still need to be overcome if HDR video is to be widely adopted and move from a niche research area into mainstream use. These include the need for high quality compression algorithms to cope with the enormous amount of data generated, the development of a common interface standard to facilitate widespread uptake, and even a definition of exactly what HDR is and what dynamic range might be considered "enough". This paper investigates these challenges and highlights some of the key endeavours being undertaken to ensure HDR is the future of imaging technology.

关键词： Lighting

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Enhancing Selective ISMACryp video Encryption for Real Time Applications in Handheld Devices

Enhancing Selective ISMACryp Video Encryption for Real Time ...

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IEEE Region 10 Conference on TENCON

作者： Joshi, Jay M. Dalal, Upena D. SVM Inst Tech Elect & Telecommun Dept Bharuch India Sardar Vallabhabhai Natl Inst Tech Dept Elect Engn Surat India

ISBN: (纸本)9781457702556

The availability of multimedia information has been increased dramatically with the advent of video broadcasting on handheld devices. But with this availability comes problems of maintaining the security of information that is displayed in public. ISMA Encryption and Authentication (ISMACryp) is technologies for video content protection in DVB-H (digital video Broadcasting-Handheld), the TV system for portable handheld devices. The ISMACryp is encoded with H. 264/AVC (advanced video coding), while leaving all structural data as it is. Two modes of ISMACryp are available;the CTR mode (Counter type) and CBC mode (Cipher Block Chaining) mode. Both modes of ISMACryp are based on 128-bit AES algorithm. This paper deals with AES-CTR mode. AES algorithms are more complex and require larger time for execution which is not suitable for real time application like Live TV, video chatting or video conferencing on handheld device. The proposed system aims to gain a deep understanding of video data security on multimedia technologies and to provide security for real time video applications using selective encryption for H. 264/AVC. Five level of security proposed in this paper based on the content of NAL unit in Baseline Constrain profile of H. 264/AVC. The selective encryption in different levels provides encryption of intra-prediction mode, residue data, inter-prediction mode or motion vectors only. Experimental results shown in this paper described that fifth level which is ISMACryp provide higher level of security with more encryption time and the one level provide lower level of security by encrypting only motion vectors with lower encryption time without compromise on compression and quality of visual content. This encryption scheme with compression process with low cost, and keeps the file format unchanged with some direct operations supported. Simulation was being carried out in Matlab.

关键词： AES CAVLC H.264 ISMACryp Motion vector

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Selective encryption using ISMACryp in real time video streaming of H.264/AVC for DVB-H application

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World Academy of Science, Engineering and Technology 2011年 55卷 342-346页

作者： Joshi, Jay M. Dalal, Upena D. Electronics and Telecommunication Dept S. V. M. nst. of Tech Bharuch 392001 India Electronics Engineering Dept Sardar Vallabhbhai National Institute of Technology Surat India

Multimedia information availability has increased dramatically with the advent of video broadcasting on handheld devices. But with this availability comes problems of maintaining the security of information that is displayed in public. ISMA Encryption and Authentication (ISMACryp) is one of the chosen technologies for service protection in DVB-H (digital video Broadcasting Handheld), the TV system for portable handheld devices. The ISMACryp is encoded with H.264/AVC (advanced video coding), while leaving all structural data as it is. Two modes of ISMACryp are available;the CTR mode (Counter type) and CBC mode (Cipher Block Chaining) mode. Both modes of ISMACryp are based on 128-bit AES algorithm. AES algorithms are more complex and require larger time for execution which is not suitable for real time application like live TV. The proposed system aims to gain a deep understanding of video data security on multimedia technologies and to provide security for real time video applications using selective encryption for H.264/AVC. Five level of security proposed in this paper based on the content of NAL unit in Baseline Constrain profile of H.264/AVC. The selective encryption in different levels provides encryption of intra-prediction mode, residue data, inter-prediction mode or motion vectors only. Experimental results shown in this paper described that fifth level which is ISMACryp provide higher level of security with more encryption time and the one level provide lower level of security by encrypting only motion vectors with lower execution time without compromise on compression and quality of visual content. This encryption scheme with compression process with low cost, and keeps the file format unchanged with some direct operations supported. Simulation was being carried out in Matlab.

关键词： Authentication

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Enhancing selective ISMACryp video encryption for real time applications in handheld devices

Enhancing selective ISMACryp video encryption for real time ...

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IEEE Region 10 International Conference TENCON

作者： Jay M. Joshi Upena D. Dalal Electronics and Telecommunication Department S. V. M. Institute of Technology Bharuch India Electronics Engineering Department Sardar Vallabhabhai National Institute of Technology Surat India

The availability of multimedia information has been increased dramatically with the advent of video broadcasting on handheld devices. But with this availability comes problems of maintaining the security of information that is displayed in public. ISMA Encryption and Authentication (ISMACryp) is technologies for video content protection in DVB-H (digital video Broadcasting- Handheld), the TV system for portable handheld devices. The ISMACryp is encoded with H.264/AVC (advanced video coding), while leaving all structural data as it is. Two modes of ISMACryp are available; the CTR mode (Counter type) and CBC mode (Cipher Block Chaining) mode. Both modes of ISMACryp are based on 128-bit AES algorithm. This paper deals with AES-CTR mode. AES algorithms are more complex and require larger time for execution which is not suitable for real time application like Live TV, video chatting or video conferencing on handheld device. The proposed system aims to gain a deep understanding of video data security on multimedia technologies and to provide security for real time video applications using selective encryption for H.264/AVC. Five level of security proposed in this paper based on the content of NAL unit in Baseline Constrain profile of H.264/AVC. The selective encryption in different levels provides encryption of intra-prediction mode, residue data, inter-prediction mode or motion vectors only. Experimental results shown in this paper described that fifth level which is ISMACryp provide higher level of security with more encryption time and the one level provide lower level of security by encrypting only motion vectors with lower encryption time without compromise on compression and quality of visual content. This encryption scheme with compression process with low cost, and keeps the file format unchanged with some direct operations supported. Simulation was being carried out in Matlab.

关键词： Encryption Streaming media Encoding Handheld computers Decoding

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The Reconfigurable video Coding Standard

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IEEE SIGNAL PROCESSING MAGAZINE 2010年第3期27卷 159-+页

作者： Mattavelli, Marco Amer, Ihab Raulet, Mickael German Univ Cairo Cairo Egypt Inst Elect & Telecommun Rennes Rennes France

More than two decades of research in digital video technologies, together with the emergence of successful international standards for digital video compression, have led to a wide variety of digital video products using video compression for professional and consumer applications. Although many of these video compression standards share common and/or similar coding tools, there is currently no explicit way to exploit such commonalities at the level of the specifications nor at the level of implementations. Moreover, the possibility of taking advantage of the benefits of the continuous improvements of coding technology is only possible by replacing an old standard with a new one. This usually results in the replacement of the existing multimedia devices with new ones capable of handling the new deployed standards. Such necessity is not always well accept-ed by the public and professionals for obvious reasons.

关键词： video coding video compression Automatic voltage control Technological innovation Standardization Signal processing algorithms video sharing MPEG standards Codecs ISO standards

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Subjective Evaluation of Next-Generation video compression algorithms: A Case Study

Subjective Evaluation of Next-Generation Video Compression A...

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Conference on Applications of digital Image Processing XXXIII

作者： De Simone, Francesca Goldmann, Lutz Lee, Jong-Seok Ebrahimi, Touradj Baroncini, Vittorio Ecole Polytech Fed Lausanne Lausanne Switzerland FUB Rome Italy

ISBN: (纸本)9780819482945

This paper describes the details and the results of the subjective quality evaluation performed at EPFL, as a contribution to the effort of the Joint Collaborative Team on video Coding (JCT-VC) for the definition of the next-generation video coding standard. The performance of 27 coding technologies have been evaluated with respect to two H.264/MPEG-4 AVC anchors, considering high definition (HD) test material. The test campaign involved a total of 494 naive observers and took place over a period of four weeks. While similar tests have been conducted as part of the standardization process of previous video coding technologies, the test campaign described in this paper is by far the most extensive in the history of video coding standardization. The obtained subjective quality scores show high consistency and support an accurate comparison of the performance of the different coding solutions.

关键词： subjective quality assessment High Efficiency video Coding (HEVC) Joint Collaborative Team on video Coding (JCT-VC) H.264/MPEG-4 AVC

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Performance Comparison of Motion Estimation algorithms on digital video Images

Performance Comparison of Motion Estimation Algorithms on Di...

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4th International Conference on Advances in Experimental Mechanics

作者： Ali, N. A. Ja'afar, A. S. Anathakrishnan, K. S. UniSA Sch Elect & Informat Engn Adelaide SA 5095 Australia UTeM Dept Comp Malacca 76109 Malaysia

ISBN: (纸本)9780819479129

This paper presents a comparative study on technique to achieve high compression ratio in video coding. The focus is on the Block Matching Motion Estimation (BMME) techniques. It has been particularly used in various coding standards. In the BMME, search patterns and the center-biased characteristics of motion vector (MV) have large impact on the search speed and quality of video. Three fast Block Matching algorithms (BMAs) of motion estimation through block matching have been implemented and performance of these three has been tested using MATLAB software. The Cross Diamond Search (CDS) is compared with Full Search (FS) and Cross Search (CS) algorithms based on search points (search speed) and peak signal-to-noise ratio (PSNR) as the quality of the video. The CDS algorithm was designed to fit the cross-center-biased (CCB) MV distribution characteristics of the real-world video sequences. CDS compares favorably with the other algorithms for low motion sequences in terms of speed, quality and computational complexity.

关键词： Block-matching motion estimation digital video compression cross-centered biased cross diamond search

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3D video Coding - An Overview of Present and Upcoming Standards

3D Video Coding - An Overview of Present and Upcoming Standa...

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Conference on Visual Communications and Image Processing (VCIP)

作者： Merkle, Philipp Mueller, Karsten Wiegand, Thomas Heinrich Hertz Inst Nachrichtentech Berlin GmbH Fraunhofer Inst Telecommun Berlin Germany Tech Univ Berlin Sch EE & CS Dept Telecommun Syst Berlin Germany

ISBN: (纸本)9780819482341

An overview of existing and upcoming 3D video coding standards is given. Various different 3D video formats are available, each with individual pros and cons. The 3D video formats can be separated into two classes: video-only formats (such as stereo and multiview video) and depth-enhanced formats (such as video plus depth and multiview video plus depth). Since all these formats exist of at least two video sequences and possibly additional depth data, efficient compression is essential for the success of 3D video applications and technologies. For the video-only formats the H.264 family of coding standards already provides efficient and widely established compression algorithms: H.264/AVC simulcast, H.264/AVC stereo SEI message, and H.264/MVC. For the depth-enhanced formats standardized coding algorithms are currently being developed. New and specially adapted coding approaches are necessary, as the depth or disparity information included in these formats has significantly different characteristics than video and is not displayed directly, but used for rendering. Motivated by evolving market needs, MPEG has started an activity to develop a generic 3D video standard within the 3DVC ad-hoc group. Key features of the standard are efficient and flexible compression of depth-enhanced 3D video representations and decoupling of content creation and display requirements.

关键词： 3D video coding 3DTV H.264 standard multiview video coding video plus depth

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A new video surveillance system based on AVS

A new video surveillance system based on AVS

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Conference on International Conference on Image Processing and Pattern Recognition in Industrial Engineering

作者： Wu, Tingwan Chen, Chaofeng S China Univ Technol Dept Phys Sch Sci Guangzhou 510640 Guangdong Peoples R China

ISBN: (纸本)9780819483294

In this paper, we analyzed the key technology of current video surveillance systems, compared the performances, prices, and the prospects between the H. 264 and AVS codec technologies, studied the advantages and disadvantages of different designs, particularly the data transmission, terminal reception facilities, decoding and demonstration of the video surveillance systems. We have optimized the core algorithms such as intra prediction, inter prediction and fast motion estimation, and performed some relevant simulations for these algorithms. Experimental results show that these new algorithms simplified the design and speeded up the compression rate. From the simulation results, we proposed a new video surveillance system based on AVS. The program reached low price, high efficiency, fast, high image quality, convenient application and operation, greatly improved the current video surveillance systems.

关键词： AVS video surveillance simulations algorithms fast motion estimation

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video Encryption Technology and Application

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丛书名： Media and Communications - technologies, Policies and Challenges

2010年

作者： Zhengquan Xu Jing Sun

ISBN: (数字)9781616687342

ISBN: (纸本)9781616683313

video encryption technology is a combination of cryptography and video technology. video encryption has become a specialized research branch in data encryption files because of its particular requirements and the special properties of video data. This book introduces several aspects of video encryption related research methods and technology solutions. A thorough description of video encryption techniques included its performance requirements, principles for designing a secure video encryption algorithm, the primary encryption algorithms and analysis, the latest research achievement, as well as its performance evaluations, novel applications are given. In addition, the open problems and potential research area of video encryption is discussed in this new and unique book.

关键词： digital video video compression Data encryption (Computer science)

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