The Experts below are selected from a list of 8244 Experts worldwide ranked by ideXlab platform
Elias Kougianos - One of the best experts on this subject based on the ideXlab platform.
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real time perceptual watermarking architectures for Video Broadcasting
Journal of Systems and Software, 2011Co-Authors: Saraju P. Mohanty, Elias KougianosAbstract:Existing secure embedded systems are primarily cryptography based. However, for effective Digital Rights Management (DRM) of multimedia in the framework of embedded systems, both watermarking and cryptography are necessary. In this paper, a watermarking algorithm and corresponding VLSI architectures are presented that will insert a broadcaster's logo into Video streams in real-time to facilitate copyrighted Video Broadcasting and Internet protocol television (IP-TV). The VLSI architecture is prototyped using a hardware description language (HDL) and when realized in silicon can be deployed in any multimedia producing consumer electronics equipment to enable real-time DRM right at the source. The watermark is inserted into the Video stream before MPEG-4 compression, resulting in simplified hardware requirements and superior Video quality. The watermarking processing is performed in the frequency (DCT) domain. The system is initially simulated and validated in MATLAB/Simulink^(R) and subsequently prototyped on an Altera^(R) Cyclone-II FPGA using VHDL. Its maximum throughput is 43frames/s at a clock speed of 100MHz which makes it suitable for emerging real-time digital Video Broadcasting applications such as IP-TV. The watermarked Video is of high quality, with an average Peak-Signal-to-Noise Ratio (PSNR) of 21.8dB and an average Root-Mean-Square Error (RMSE) of 20.6.
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Real-time perceptual watermarking architectures for Video Broadcasting
Journal of Systems and Software, 2011Co-Authors: Saraju P. Mohanty, Elias KougianosAbstract:Existing secure embedded systems are primarily cryptography based. However, for effective Digital Rights Management (DRM) of multimedia in the framework of embedded systems, both watermarking and cryptography are necessary. In this paper, a watermarking algorithm and corresponding VLSI architectures are presented that will insert a broadcaster's logo into Video streams in real-time to facilitate copyrighted Video Broadcasting and Internet protocol television (IP-TV). The VLSI architecture is prototyped using a hardware description language (HDL) and when realized in silicon can be deployed in any multimedia producing consumer electronics equipment to enable real-time DRM right at the source. The watermark is inserted into the Video stream before MPEG-4 compression, resulting in simplified hardware requirements and superior Video quality. The watermarking processing is performed in the frequency (DCT) domain. The system is initially simulated and validated in MATLAB/Simulink®and subsequently prototyped on an Altera®Cyclone-II FPGA using VHDL. Its maximum throughput is 43 frames/s at a clock speed of 100 MHz which makes it suitable for emerging real-time digital Video Broadcasting applications such as IP-TV. The watermarked Video is of high quality, with an average Peak-Signal-to-Noise Ratio (PSNR) of 21.8 dB and an average Root-Mean-Square Error (RMSE) of 20.6. © 2010 Elsevier Inc. All rights reserved.
Saraju P. Mohanty - One of the best experts on this subject based on the ideXlab platform.
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real time perceptual watermarking architectures for Video Broadcasting
Journal of Systems and Software, 2011Co-Authors: Saraju P. Mohanty, Elias KougianosAbstract:Existing secure embedded systems are primarily cryptography based. However, for effective Digital Rights Management (DRM) of multimedia in the framework of embedded systems, both watermarking and cryptography are necessary. In this paper, a watermarking algorithm and corresponding VLSI architectures are presented that will insert a broadcaster's logo into Video streams in real-time to facilitate copyrighted Video Broadcasting and Internet protocol television (IP-TV). The VLSI architecture is prototyped using a hardware description language (HDL) and when realized in silicon can be deployed in any multimedia producing consumer electronics equipment to enable real-time DRM right at the source. The watermark is inserted into the Video stream before MPEG-4 compression, resulting in simplified hardware requirements and superior Video quality. The watermarking processing is performed in the frequency (DCT) domain. The system is initially simulated and validated in MATLAB/Simulink^(R) and subsequently prototyped on an Altera^(R) Cyclone-II FPGA using VHDL. Its maximum throughput is 43frames/s at a clock speed of 100MHz which makes it suitable for emerging real-time digital Video Broadcasting applications such as IP-TV. The watermarked Video is of high quality, with an average Peak-Signal-to-Noise Ratio (PSNR) of 21.8dB and an average Root-Mean-Square Error (RMSE) of 20.6.
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Real-time perceptual watermarking architectures for Video Broadcasting
Journal of Systems and Software, 2011Co-Authors: Saraju P. Mohanty, Elias KougianosAbstract:Existing secure embedded systems are primarily cryptography based. However, for effective Digital Rights Management (DRM) of multimedia in the framework of embedded systems, both watermarking and cryptography are necessary. In this paper, a watermarking algorithm and corresponding VLSI architectures are presented that will insert a broadcaster's logo into Video streams in real-time to facilitate copyrighted Video Broadcasting and Internet protocol television (IP-TV). The VLSI architecture is prototyped using a hardware description language (HDL) and when realized in silicon can be deployed in any multimedia producing consumer electronics equipment to enable real-time DRM right at the source. The watermark is inserted into the Video stream before MPEG-4 compression, resulting in simplified hardware requirements and superior Video quality. The watermarking processing is performed in the frequency (DCT) domain. The system is initially simulated and validated in MATLAB/Simulink®and subsequently prototyped on an Altera®Cyclone-II FPGA using VHDL. Its maximum throughput is 43 frames/s at a clock speed of 100 MHz which makes it suitable for emerging real-time digital Video Broadcasting applications such as IP-TV. The watermarked Video is of high quality, with an average Peak-Signal-to-Noise Ratio (PSNR) of 21.8 dB and an average Root-Mean-Square Error (RMSE) of 20.6. © 2010 Elsevier Inc. All rights reserved.
Alexander Adolf - One of the best experts on this subject based on the ideXlab platform.
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Update to the Registrant Information for the Digital Video Broadcasting Project (DVB) Uniform Resource Name (URN) Namespace
2014Co-Authors: Alexander Adolf, Peter SiebertAbstract:RFC 5328 registered the Uniform Resource Name (URN) namespace "dvb" for the Digital Video Broadcasting Project. This document updates RFC 5328 with new registrant information.
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Uniform Resource Identifiers for Digital Video Broadcasting (DVB)
2013Co-Authors: Alexander Adolf, Mo McrobertsAbstract:Uniform Resource Identifier (URI) schemes for Broadcasting programme resources transmitted over MPEG-2 Transport Streams [MPEG-Systems] have been devised in their process of creating standards by the Digital Video Broadcasting Project (DVB), the Association of Radio Industries and Businesses in Japan (ARIB) and the OpenCable Application Platform (OCAP) to acquire current and future scheduled publications of broadcast media content from multimedia applications such as HTTP, MHP [DVB-MHP], OCAP [OCAP1.0] or other XML based metadata. These URI are used to locate the actual digital TV, Radio or other multimedia broadcast programme services (i.e., channels or events) and also the audio-visual components related to that programme, for example an HTTP-based programme guide on the Web or other XML-based electronic programme guides in digital broadcast receivers. This document defines the "dvb" URI scheme for the benefit of the Internet community, given its definition as part of the Digital Video Broadcasting (DVB) suite of ETSI standards.
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A Uniform Resource Name (URN) Namespace for the Digital Video Broadcasting Project (DVB)
2008Co-Authors: Peter Macavock, Alexander AdolfAbstract:This document describes a Uniform Resource Name (URN) namespace for the Digital Video Broadcasting Project (DVB) for naming persistent resources defined within DVB standards. Example resources include technical documents and specifications, eXtensible Markup Language (XML) Schemas, classification schemes, XML Document Type Definitions (DTDs), namespaces, style sheets, media assets, and other types of resources produced or managed by DVB. This memo provides information for the Internet community.
U. Reimers - One of the best experts on this subject based on the ideXlab platform.
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digital Video Broadcasting
IEEE Communications Magazine, 1998Co-Authors: U. ReimersAbstract:A new kind of "wireless Video" is currently entering consumers' homes-digital television. The term digital Video Broadcasting (DVB) is used as a synonym for digital television in many countries of the world. Whereas one may tend to think that digital television means just a new, digital, form of signal representation not necessarily affecting the information content of what one has always called TV, the truth is that digital television becomes multiple-channel data Broadcasting. This article reviews some of the results of the work in the worldwide DVB Project and explains some of the fundamental concepts behind the work of this group. It then concentrates on the terrestrial transmission system (DVB-T) as one example of the many transmission technologies DVB has developed over the last few years. The COFDM modulation scheme which is a key ingredient of DVB-T is described in some detail. The performance of the system is presented. The use of DVB for data Broadcasting and the accompanying return channel technologies are explained.
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The European Project on Digital Video Broadcasting - achievements and current status
International Broadcasting Convention - IBC '94, 1994Co-Authors: U. ReimersAbstract:In Europe, the development of standards for digital Video Broadcasting (DVB) as well as the preparation of the introduction of services is coordinated by the European Project on Digital Video Broadcasting (“DVB Project”). Thepaper describes the project as well as some of the achievements reached so far. Techniques for the transmission of DVB signals via satellite have been devised as well as a specification for retransmission of DVB signals via cable and (S)MATV networks. A standard describing service information, a common scrambling system and several other tasks have been finalized. Currently the specification for the terrestrial transmission of DVB signals is being drafted.
S.-h. Gary Chan - One of the best experts on this subject based on the ideXlab platform.
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Peer-to-peer error recovery for wireless Video Broadcasting
Peer-to-Peer Networking and Applications, 2015Co-Authors: Bo Zhang, S.-h. Gary Chan, Gene CheungAbstract:Wireless Video Broadcasting has experienced much growth in recent years. In Video Broadcasting, packet loss is inevitable due to dynamic channel condition. To address this, we study peer-to-peer (P2P) error recovery. In our system, a mobile station (MS) may generate some parity packets based on its received source packets and share them by Broadcasting to its neighbors via a secondary channel (e.g., Wi-Fi or Bluetooth). With parity packets from its neighbors, an MS can effectively repair its lost packets locally. An important problem is to minimize the total number of parity packets generated while achieving a certain residual loss rate at the MSs. We first formulate the problem as a linear program which can be solved efficiently as the optimal performance of the system. We then propose a novel and fully distributed algorithm based on only local information at clients. Simulation results show that our distributed solution achieves high recovery efficiency and fast convergence. It generates very low recovery traffic and high Video quality. Its performance is very close to the optimal solution based on centralized approach with complete network information.
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bopper wireless Video Broadcasting with peer to peer error recovery
International Conference on Multimedia and Expo, 2007Co-Authors: Shenjie Li, S.-h. Gary ChanAbstract:Wireless digital Video Broadcasting has experienced much success in years with some industrial systems deployed. We study in this paper how to recover lost packets in Video Broadcasting by means of a free broadcast-based secondary channel (such as IEEE-802.11 or Bluetooth). In our scheme, termed BOPPER (Broadcasting with peer-to-peer error recovery), mobile devices collaboratively help each other to recover packet lost by Broadcasting to their neighborhood. BOPPER achieves high scalability, low recovery delay, independence of a backward channel and low bandwidth cost. We study how to minimize the total number of retransmissions while achieving a certain level of recovery capability. We first consider the case with global knowledge (in terms of peer connectivity, loss status and pairwise loss rates of all peers) and formulate the problem as a linear program which can be solved efficiently. The result also serves as the optimum for our distributed protocol. We then propose and study a scalable, adaptive and distributed protocol which makes use of local information and message exchange to achieve efficient packet loss recovery. Simulation results show that our distributed scheme achieves close to the optimum with fast convergence time.
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ICME - BOPPER: Wireless Video Broadcasting with Peer-to-Peer Error Recovery
Multimedia and Expo 2007 IEEE International Conference on, 2007Co-Authors: Shenjie Li, S.-h. Gary ChanAbstract:Wireless digital Video Broadcasting has experienced much success in years with some industrial systems deployed. We study in this paper how to recover lost packets in Video Broadcasting by means of a free broadcast-based secondary channel (such as IEEE-802.11 or Bluetooth). In our scheme, termed BOPPER (Broadcasting with peer-to-peer error recovery), mobile devices collaboratively help each other to recover packet lost by Broadcasting to their neighborhood. BOPPER achieves high scalability, low recovery delay, independence of a backward channel and low bandwidth cost. We study how to minimize the total number of retransmissions while achieving a certain level of recovery capability. We first consider the case with global knowledge (in terms of peer connectivity, loss status and pairwise loss rates of all peers) and formulate the problem as a linear program which can be solved efficiently. The result also serves as the optimum for our distributed protocol. We then propose and study a scalable, adaptive and distributed protocol which makes use of local information and message exchange to achieve efficient packet loss recovery. Simulation results show that our distributed scheme achieves close to the optimum with fast convergence time.
