A Pipelined Hardware Architecture for Motion Estimation of H.264/AVC

Kim, Cheong-Ghil; Kim, Shin-Dug

doi:10.1007/11572961_8

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…But the original signer cannot create a valid proxy signature, while the proxy signer cannot delegate the signing power to other persons. Moreover, Lee et al [2] pointed out that a proxy signature scheme is secure only if it satisfies verifiability, strong identifiability, strong undeniability, strong unforgeability and prevention of misuse.…”

Section: Introductionmentioning

confidence: 99%

Improvement of a Self Proxy Signature Scheme

Xie

2010

AMM

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The aim of self proxy is to protect the signer’s permanent secret key. In 2007, Kim and Chang proposed a self proxy signature scheme. In this paper, we show that their scheme cannot resist the warrant revision attack. Anyone can forge a valid proxy warrant and generate a valid self proxy signature for any message, when he gets a self proxy signature. To overcome their weakness, an improvement scheme is proposed, which is provably secure in random oracle model.

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Section: Introductionmentioning

confidence: 99%

Improvement of a Self Proxy Signature Scheme

Xie

2010

AMM

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An efficient low-cost FPGA implementation of a configurable motion estimation for H.264 video coding

Elhamzi

Dubois²,

Mitéran³

et al. 2012

J Real-Time Image Proc

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Url: http://dx.doi.org/10.1007/s11554-012-0274-5International audienceDespite the diversity of video compression standard, the motion estimation still remains a key process which is used in most of them. Moreover, the required coding performances (bit-rate, PSNR, image spatial resolution,etc.) depend obviously of the application, the environment and the network communication. The motion estimation can therefore be adapted to fit with these performances. Meanwhile, the real time encoding is required in many applications. To reach this goal, we propose in this paper a flexible hardware implementation of the motion estimator which enables the integer motion search algorithms to be modified and the fractional search as well as variable block size to be selected and adjusted. Hence, this novel architecture, especially designed for FPGA targets, proposes high-speed processing for a configuration which supports the variable size blocks and quarter-pel refinement, as described in H.264. The proposed low-cost architecture based on Virtex 6 FPGA can process integer motion estimation on 1080 HD video streams, respectively, at 13 fps using full search strategy (108k Macroblocks/s) and up to 223 fps using diamond search (1.8M Macroblocks/s). Moreover subpel refinement in quarter-pel mode is performed at 232k Macroblocks/s

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Multi-view video prediction architecture using faster prediction order

Choi

Cho

2010

2010 IEEE Asia Pacific Conference on Circuits and Systems

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A Pipelined Hardware Architecture for Motion Estimation of H.264/AVC

Cited by 3 publications

References 2 publications

Improvement of a Self Proxy Signature Scheme

Improvement of a Self Proxy Signature Scheme

An efficient low-cost FPGA implementation of a configurable motion estimation for H.264 video coding

Multi-view video prediction architecture using faster prediction order

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