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基于H.263视频压缩的新钻石搜索算法 总被引:1,自引:0,他引:1
提出了一种基于H.263的改进的新钻石搜索算法。给出了算法流程图,重点对根据该算法自行编写并检验通过的精华程序段进行了详细的介绍和讨论。仿真实验的结果证明,实际编程实现的新钻石搜索算法远远胜于传统三步搜索法,从而大大提高了计算速度和压缩率。 相似文献
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基于H.263标准的视频压缩算法的优化及研发 总被引:1,自引:0,他引:1
介绍了基于H.263标准的视频压缩算法,对作为视频压缩关键技术的运动估计算法进行了深入的研究,提出了一种改进算法,并引入英特尔公司的MMX技术进行双重优化后的新钻石搜索算法,以消除原钻石搜索算法中大量的重复计算。仿真实验结果证明,双重优化的新算法大大地提高了计算速度和压缩率。相应的研发成果已在本课题组与烟台正达公司的合作项目中得到了应用,并通过了验收,取得了令人满意的效果。 相似文献
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On Design of Parallel Memory Access Schemes for Video Coding 总被引:3,自引:0,他引:3
Jarno K. Tanskanen Reiner Creutzburg Jarkko T. Niittylahti 《The Journal of VLSI Signal Processing》2005,40(2):215-237
Some of the modern powerful digital signal processors (DSPs) have byte-addressable internal data memory. This property is valuable especially in computationally demanding inter frame video encoding, where data accesses are typically unaligned according to word boundaries. The byte-addressable memory allows load or store command to start accessing from any byte-address, providing at most as many successive bytes from subsequent addresses as data bus can handle in parallel. Maybe the simplest way to construct such a byte-addressable memory is to use N 8-bit memory modules or banks to be accessed in parallel, when N is data bus width in bytes. However, in addition to byte-addressable subsequent bytes, memory consisting of parallel memory modules can provide much more versatile addressing capabilities with reasonable implementation cost. Versatile access formats can significantly reduce the need for data reordering in the register file. At first, we provide motivation for using parallel memory architecture with versatile access formats as an internal on-chip data memory of modern DSP. After this, notations are described and general view of parallel memory design is given. We propose some example parallel data memory architecture designs with data access formats especially helpful in H.263 encoding and MPEG-4 core profile motion and texture encoding. The examples are given for different data bus widths (16, 32, 64, and 128 bits). Finally, performance is shortly compared to other memory architectures and area, delay, and power figures are estimated.Jarno K. Tanskanen was born in Joensuu, Finland in 1975. He studied analog and digital electronics in the Department of Electrical Engineering, and computer architecture in the Department of Information Technology at Tampere University of Technology, where he received his M.Sc. degree in 1999. He is currently working as a research scientist in the Institute of Digital and Computer Systems at TUT. His Dr.Tech. research concerns parallel processing of video compression. jarno.tanskanen@tut.fiReiner Creutzburg received his Diploma in Mathematics in 1976 and attained his Ph.D. in Mathematics in 1984 from the Rostock University, Germany. Prof. Creutzburg has published 3 books, filed 2 patents, and produced approximately 100 articles, preprint, and conference papers. Professional Experience: Since 2000—Part-time Professor for Multimedia technology, Tampere University of Technology, Finland. Since 1992—Full-time Professor of Computer Science, Fachhochschule Brandenburg-University of Applied Sciences, Brandenburg, Germany. 1990 to 1992—Assistant Professor, University of Karlsruhe, Institute of Algorithms and Cognitive Systems, Germany. 1987 to 1989—Head of the Research Section Image Processing. 1986 to 1989—Founder and Head of the International Base Laboratory of Image Processing and Computer Graphics for East European countries at the Central Institute of Cybernetics and Information Processes of the Academy of Sciences (Berlin), Germany. 1976 to 1989—Researcher and Assistant Professor in various Universities and the Academy of Sciences, Central Institute of Cybernetics and Information, Berlin. creutzburg@fh-brandenburg.deJarkko T. Niittylahti was born in Orivesi, Finland, in 1962. He received the M.Sc, Lic.Tech, and Dr.Tech degrees at Tampere University of Technology (TUT) in 1988, 1992, and 1995, respectively. From 1987 to 1992, he was a researcher at TUT. In 1992–93, he was a researcher at CERN in Geneva, Switzerland. In 1993–95, he was with Nokia Consumer Electronics, Bochum, Germany, and in 1995–97 with Nokia Research Center, Tampere, Finland. In 1997–2000, he was a Professor at Signal Processing Laboratory, TUT, and in 2000–2002 at Institute of Digital and Computer Systems, TUT. Currently, he is a Docent of Digital Techniques at TUT and the managing director of Staselog Ltd. He is also a co-founder and President of Atostek Ltd. He is interested in designing digital systems and architectures. jarkko.niittylahti@tut.fi 相似文献
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一种基于IP的视频监控系统设计 总被引:8,自引:2,他引:6
提出了一种基于IP的视频监控系统设计,阐述了视频编码系统的硬件结构体系和实时视频软件解码系统的设计方案,就视频数据网络传输中的数据处理等关键技术进行了分析。 相似文献
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Wei-Jen Ting Wei-Wen Kuo Dennis Jine-Yuan Hsieh Yu-Lan Yeh Cecilia-Hsuan Day Ya-Hui Chen Ray-Jade Chen Viswanadha Vijaya Padma Yi-Hsing Chen Chih-Yang Huang 《International journal of molecular sciences》2015,16(10):25881-25896
Obesity is one of the major risk factors for nonalcoholic fatty liver disease (NAFLD), and NAFLD is highly associated with an increased risk of cardiovascular disease (CVD). Scholars have suggested that certain probiotics may significantly impact cardiovascular health, particularly certain Lactobacillus species, such as Lactobacillus reuteri GMNL-263 (Lr263) probiotics, which have been shown to reduce obesity and arteriosclerosis in vivo. In the present study, we examined the potential of heat-killed bacteria to attenuate high fat diet (HFD)-induced hepatic and cardiac damages and the possible underlying mechanism of the positive effects of heat-killed Lr263 oral supplements. Heat-killed Lr263 treatments (625 and 3125 mg/kg-hamster/day) were provided as a daily supplement by oral gavage to HFD-fed hamsters for eight weeks. The results show that heat-killed Lr263 treatments reduce fatty liver syndrome. Moreover, heat-killed Lactobacillus reuteri GMNL-263 supplementation in HFD hamsters also reduced fibrosis in the liver and heart by reducing transforming growth factor β (TGF-β) expression levels. In conclusion, heat-killed Lr263 can reduce lipid metabolic stress in HFD hamsters and decrease the risk of fatty liver and cardiovascular disease. 相似文献
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AVS编解码技术标准及其在数字视频监控系统上的应用 总被引:1,自引:0,他引:1
本文简单介绍了MPEG-4,H.264视频编码技术,主要介绍了我国"数字音视频编解码技术标准工作组"制定的AVS标准,并对上述视频编码技术进行简单的对比。重点讲述AVS标准及其在视频监控系统中的应用。希望通过本文能引起业内的注意,在视频监控中更多地使用AVS视频编码技术,解决目前困扰数字视频监控系统发展的瓶颈。 相似文献