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检索条件"机构=Architecture and Technology of Computing Group"

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High-efficient architecture of Godson-T many-core processor 23

High-efficient architecture of Godson-T many-core processor

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23rd IEEE Hot Chips Symposium, HCS 2011

作者： Fan, Dongrui Zhang, Hao Wang, Da Ye, Xiaochun Song, Fenglong Zhang, Junchao Fan, Lingjun Advanced Micro-System Group National Key Laboratory of Computer Architecture Institute of Computing Technology Chinese Academy of Sciences China

This article consists of a collection of slides from the author's conference presentation on the special features, system design, processing capabilities, and targeted markets for AMS's Godson-T microprocessor...

ISBN: (纸本)9781467388771

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Applying data mining techniques in a Wyner-Ziv to H.264 video transcoder

Applying data mining techniques in a Wyner-Ziv to H.264 vide...

引用

Lecture Notes in Computer Science

作者： Martínez, José Luis Corrales-García, Alberto Cuenca, Pedro Quiles, Francisco José Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria s/n 28040 Madrid Spain University of Castilla-La Mancha Campus Universitario 02071 Albacete Spain

ISBN: (纸本)9783642215001

This paper proposes an improved Wyner-Ziv to H.264 transcoder for supporting mobile-to-mobile video communications. In this framework, both transmitter and receptor should employ video encoders and decoders of low complexity. Taking advantage of both paradigms, in terms of low complexity algorithms, a suitable solution consists in transcoding from Wyner-Ziv to H.264. In order to reduce this process this paper proposes an algorithm which is based on the hypothesis that macroblock coding mode decisions in H.264 video have a high correlation with the distribution of the side information residual in Wyner-Ziv video. The proposed algorithm, which is based on data mining techniques, selects one sub-set of the several coding modes in H.264. Simulation results show that the proposed transcoder reduces the inter prediction complexity in H.264 by up to 53%, while maintaining coding efficiency. © 2011 Springer-Verlag.

关键词： Data mining

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Low complexity adaptation for mobile video environments using data mining

Low complexity adaptation for mobile video environments usin...

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2011 4th Joint IFIP Wireless and Mobile Networking Conference, WMNC 2011

作者： Garrido-Cantos, Rosario Cuenca, Pedro Garrido, Antonio De Cock, Jan Van Leuven, Sebastiaan Van De Walle, Rik Martinez, Jose Luis Albacete Research Institute of Informatics University of Castilla-La Mancha Albacete Spain Ghent University ELIS Department Multimedia Lab. Ghent Belgium Architecture and Technology of Computing Group Complutense University Madrid Spain

ISBN: (纸本)9781457711930

Mobile multimedia contents have been introduced in the market and their demand is growing every day due to the increasing number of mobile devices and the possibility to watch them at any moment in any place. These multimedia contents are delivered over different networks that are visualized in mobile terminals with heterogeneous characteristics. To ensure a continuous high quality it is desirable that this multimedia content can be adapted on-the-fly to the transmission constraints and the characteristics of the mobile devices. In general, video contents are compressed to save storage capacity and to reduce the bandwidth required for its transmission. Therefore, if these compressed video streams were compressed using scalable video coding schemes, they would be able to adapt to those heterogeneous networks and a wide range of terminals. Since the majority of the multimedia contents are compressed using H.264/AVC, they cannot benefit from that scalability. This paper proposes a technique to convert an H.264/AVC bitstream without scalability to a scalable bitstream with temporal scalability as part of a framework for low-complexity video adaptation for mobile environments. The results show that when our technique is applied, the complexity is reduced by 82% while maintaining coding efficiency. © 2011 IEEE.

关键词： Scalable video coding

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Wyner-Ziv frame parallel decoding based on multicore processors

Wyner-Ziv frame parallel decoding based on multicore process...

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3rd IEEE International Workshop on Multimedia Signal Processing, MMSP 2011

作者： Corrales-Garcia, A. Martínez, J.L. Fernandez-Escribano, G. Quiles, F.J. Fernando, W.A.C. University of Castilla-La Mancha Campus Universitario 02071 Albacete Spain Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria s/n 28040 Madrid Spain University of Surrey GU2 7XH Guildford Surrey United Kingdom

ISBN: (纸本)9781457714337

Wyner-Ziv video coding presents a new paradigm which offers low-complexity video encoding. However, the Wyner-Ziv paradigm accumulates high complexity at the decoder side and this could involve difficulties for applications which have delay requisites. On the other hand, technological advances provide us with new hardware which supports parallel data processing. In this paper, a faster Wyner-Ziv video decoding scheme based on multicore processors is proposed. In this way, each frame is decoded by means of the collaboration between several processing units, achieving a time reduction up to 71% without significant rate-distortion drop penalty. © 2011 IEEE.

关键词： Data handling

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Ensuring privacy in a Distributed Video Coding surveillance scenario

Ensuring privacy in a Distributed Video Coding surveillance ...

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1st IEEE International Conference on Consumer Electronics - Berlin, ICCE-Berlin 2011

作者： Martínez, J.L. Villalón, J.M. Parreño, J.H. Cuenca, P. Kalva, H. Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria s/n 28040 Madrid Spain University of Castilla-La Mancha Campus Universitario 02071 Albacete Spain Department of Computer Science and Engineering Florida Atlantic University 777 Glades Rd Boca Raton FL 34341 United States

ISBN: (纸本)9781457702341

In this paper, a permutation scheme is introduced for Distributed Video Coding. The main goal is to preserve privacy and security in video surveillance video communications and can be adapted for other scenarios. The proposed approach consists to apply permutation based encryption to the DVC scenario. The permutation is defined by a secret key which is required at the decoder for decompression providing security. Simulation results show that the reference architecture and the permutation-based proposed have similar rate distortion performance. © 2011 IEEE.

关键词： Cryptography

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Low complexity adaptation for mobile video environments using data mining

Low complexity adaptation for mobile video environments usin...

引用

Joint IFIP Wireless and Mobile Networking Conference (WMNC)

作者： Rosario Garrido-Cantos Pedro Cuenca Antonio Garrido Jan De Cock Sebastiaan Van Leuven Rik Van de Walle Jose Luis Martinez Albacete Research Institute of Informatics University of Castilla-La Mancha Albacete Spain ELIS Department-Multimedia Laboratory Ghent University-IBBT Ghent Belgium Architecture and Technology of Computing Group Complutense University Madrid Spain

关键词： Static VAr compensators Scalability Decision trees Mobile communication Decoding Transcoding

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Reducing complexity in H.264/AVC motion estimation by using a GPU

Reducing complexity in H.264/AVC motion estimation by using ...

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3rd IEEE International Workshop on Multimedia Signal Processing, MMSP 2011

作者： Rodríguez-Sánchez, R. Martínez, J.L. Fernández-Escribano, G. Claver, J.M. Sánchez, J.L. Instituto de Investigación en Informática de Albacete Universidad de Castilla-La Mancha Campus Universitario 02071 Albacete Spain Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria 28040 Madrid Spain Dpto. de Informática Universidad de Valencia Avd. Vicente Andrés Estellés s/n 46100 Burjassot Spain

ISBN: (纸本)9781457714337

H.264/AVC applies a complex mode decision technique that has high computational complexity in order to reduce the temporal redundancies of video sequences. Several algorithms have been proposed in the literature in recent years with the aim of accelerating this part of the encoding process. Recently, with the emergence of many-core processors or accelerators, a new approach can be adopted for reducing the complexity of the H.264/AVC encoding algorithm. This paper focuses on reducing the inter prediction complexity adopted in H.264/AVC and proposes a GPU-based implementation using CUDA. Experimental results show that the proposed approach reduces the complexity by as much as 99% (100x of speedup) while maintaining the coding efficiency. © 2011 IEEE.

关键词： Graphics processing unit

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Providing immersive virtual experience with first-person perspective omnidirectional movies and three dimensional sound field

Providing immersive virtual experience with first-person per...

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4th International Conference on Virtual and Mixed Reality, Virtual and Mixed Reality 2011, held as part of the 14th International Conference on Human-Computer Interaction, HCI International 2011

作者： Kondo, Kazuaki Mukaigawa, Yasuhiro Ikeda, Yusuke Enomoto, Seigo Ise, Shiro Nakamura, Satoshi Yagi, Yasushi Academic Center for Computing and Media studies Kyoto University Yoshida honmachi Sakyo-ku Kyoto Japan The Institute of Scientific and Industrial Research Osaka University 8–1 Mihogaoka Ibaraki-shiOsaka Japan Spoken Language Communication Group National Institute of Information and Communications Technology 3–5 Hikaridai Keihanna Science City Japan Graduate school of engineering Department of Architecture and architectural engineering Kyoto University Kyotodaigaku-katsura Nishikyo-ku Kyoto Japan

ISBN: (纸本)9783642220203

Providing high immersive feeling to audiences has proceeded with growing up of techniques about video and acoustic medias. In our proposal, we record and reproduce omnidirectional movies captured at a perspective of an actor and three dimensional sound field around him, and try to reproduce more impressive feeling. We propose a sequence of techniques to archive it, including a recording equipment, video and acoustic processing, and a presentation system. Effectiveness and demand of our system has been demonstrated by ordinary people through evaluation experiments. © Springer-Verlag Berlin Heidelberg 2011.

关键词： Acoustic fields

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Ensuring privacy in a Distributed Video Coding surveillance scenario

Ensuring privacy in a Distributed Video Coding surveillance ...

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IEEE International Conference on Consumer Electronics - Berlin (ICCE-Berlin)

作者： J. L. Martínez J.M. Villalón J.H. Parreño P. Cuenca H. Kalva Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria s/n Madrid SPAIN Instituto de Investigacion en Informatica de Albacete (I3A) Campus Universitario Albacete SPAIN Department of Computer Science and Engineering Florida Atlantic University FL USA

关键词： Encryption Privacy Decoding Correlation Bit rate

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Reducing complexity in H.264/AVC motion estimation by using a GPU

Reducing complexity in H.264/AVC motion estimation by using ...

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IEEE Workshop on Multimedia Signal Processing

作者： R. Rodríguez-Sánchez J. L. Martínez G. Fernández-Escribano J. M. Claver J. L. Sánchez Instituto de Investigación en Informática de Albacete Universidad de Castilla La Mancha Albacete Spain Architecture and Technology of Computing Systems Group Complutense University Ciudad Universitaria Madrid Spain Departmento de Informática Universidad de Valencia Burjassot Spain

关键词： Graphics processing unit Prediction algorithms Algorithm design and analysis Encoding Instruction sets Proposals Software algorithms

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