检索结果-内蒙古大学图书馆

optical computing techniques FOR IMAGE VIDEO COMPRESSION

PROCEEDINGS OF THE IEEE 1994年第6期82卷 948-954页

作者： YOSHIDA, A REIF, JH Dept. of Comput. Sci. Duke Univ. Durham NC

The advantage of optics is its capability of providing highly parallel operations in a three-dimensional space. In this paper, we propose optical architectures to execute various image compression techniques. We optically implement the following compression techniques: transform coding vector quantization video coding We show many generally used transform coding methods, for example, the cosine transform, can be implemented by a simple optical system. The transform coding can be carried out in constant time. Most of this paper is concerned with an innovative optical system for vector quantization using holographic associative matching. Limitations of conventional vector quantization schemes are caused by a large number of sequential searches through a large vector space. Holographic associative matching provided by multiple exposure holograms can offer advantageous techniques for vector-quantization-based compression schemes. Photorefractive crystals, which provide high-density recording in real time, are used as our holographic media. The reconstruction alphabet can be dynamically constructed through training or stored in the Photorefractive crystal in advance. Encoding a new vector can be carried out by holographic associative matching in constant time. An extension to interframe coding using optical block matching methods is also discussed. Most of the results in this paper were previously presented in our earlier paper [1].

关键词： block codes cosine transform encoding highly parallel operations holographic associative matching holography image coding image compression interframe coding optical block matching methods optical computing techniques optical information processing parallel processing photorefractive crystals reconstruction alphabet sequential searches transform coding transforms vector quantisation vector quantization video coding video compression video signals

来源：评论

学校读者我要写书评

暂无评论

MULTIPLEXER AS A UNIVERSAL computing ELEMENT FOR ELECTROOPTIC LOGIC SYSTEMS

引用

IEE PROCEEDINGS-J OPTOELECTRONICS 1990年第5期137卷 305-310页

作者： BRACKENBURY, LEM Department of Computer Science University of Manchester Manchester UK

It is shown that any combinational function can be implemented by a multiplexer of appropriate width. Since these logic elements can also perform sequential operations, entire digital systems can be implemented with multiplexers. Such systems are of particular relevance to optical implementations as multiplexers using liquid crystal electro-optic elements can be realised. The large number of pixels available on a single display leads to the concept of significant optical systems implemented using two-dimensional arrays of uncommitted multiplexers. Since the multiplexer width is critical in determining the system efficiency, the implementation of commonly occurring logic functions is presented to determine the optimum width.

关键词： digital systems combinational function optical logic multiplexer optical computing techniques Display technology liquid crystal displays optical computing Communication system theory Switching centres and equipment liquid crystal electro-optic elements Liquid crystal devices multiplexer width 2D uncommitted multiplexer arrays electro-optic logic systems logic elements logic functions pixels universal computing element logic gates multiplexing optical logic devices and optical computing techniques sequential operations Information theory optical logic elements electro-optical devices system efficiency

来源：评论

学校读者我要写书评

暂无评论

PYRAMIDICAL PIPELINING OF AO CELLS FOR computing SUCCESSIVE MATRIX POWERS

引用

IEE PROCEEDINGS-J OPTOELECTRONICS 1988年第3期135卷 276-280页

作者： MARGARITIS, K BEKAKOS, MP EVANS, DJ Department of Computer Studies Loughborough University of Technology Loughborough UK

The paper describes an optical implementation for successive matrix powers, using an optical processor as a basic component for matrix/matrix multiplication with unidirectional data flow. Then, a series of optical processors are lined up to produce a pyramidical pipeline for successive matrix squarings. Suitable applications which would benefit include, besides the calculation of matrix powers, the evaluation of matrix polynomials, iterative solutions of linear equations, iterative matrix inversion, and the calculation of matrix functions, i.e. matrix exponential.

关键词： Computer architecture optical information processing matrix functions pipeline processing optical computing techniques Algebra pyramidical pipelining acousto-optical devices iterative matrix inversion unidirectional data flow AO cells matrix polynomials matrix algebra matrix exponential iterative solutions computing Linear algebra (numerical analysis) optical processor matrix/matrix multiplication linear equations iterative methods optical logic devices and optical computing techniques successive matrix powers Acousto-optical devices optical implementation matrix powers

来源：评论

学校读者我要写书评

暂无评论

Performance of an embedded optical vector matrix multiplication processor architecture

引用

IET OPTOELECTRONICS 2010年第4期4卷 159-164页

作者： Yang, C. Cui, G. X. Huang, Y. Y. Wu, L. Yang, H. Zhang, Y. H. Chinese Acad Sci Inst Semicond Beijing 100083 Peoples R China Chinese Acad Sci Suzhou Inst Nanotech & Nanobion Suzhou 215125 Peoples R China

An embedded architecture of optical vector matrix multiplier (OVMM) is presented. The embedded architecture is aimed at optimising the data flow of vector matrix multiplier (VMM) to promote its performance. Data dependence is discussed when the OVMM is connected to a cluster system. A simulator is built to analyse the performance according to the architecture. According to the simulation, Amdahl's law is used to analyse the hybrid opto-electronic system. It is found that the electronic part and its interaction with optical part form the bottleneck of system.

关键词： optical computers, logic elements, and interconnects Amdahl law Linear algebra (numerical analysis) hybrid opto-electronic system embedded systems digital arithmetic Integrated optics Algebra, set theory, and graph theory Integrated optoelectronics Digital circuit design, modelling and testing Digital arithmetic methods optical computing optical logic devices and optical computing techniques integrated optics embedded optical vector matrix multiplication processor architecture vector matrix multiplier matrix multiplication optical computing techniques integrated optoelectronics

来源：评论

学校读者我要写书评

暂无评论

RNS-FPL merged architectures for orthogonal DWT

引用

ELECTRONICS LETTERS 2000年第14期36卷 1198-1199页

作者： Ramírez, J García, A Fernández, PG Parrilla, L Lloris, A Dept Elect & Tecnol Comp Granada 18071 Spain Escuela Politecn Super Dept Ingn Elect Jaen 23071 Spain

Novel. regular, compact and easily scalable residue number system (RNS) field-programmable logic (FPL) merged architectures for the orthogonal 1D discrete wavelet transform (DWT) and 1D inverse discrete wavelet transform (IDWT) are presented. These structures halve the number of look-up tables (LUTs) required per octave, providing a sustained throughput independent of the input data and filter coefficient precision. Thy are suitable to be considered as the core of 2D DWT processors for high data rate image processing applications.

关键词： look-up tables field-programmable logic merged architectures 2D DWT processors optical logic table lookup filter coefficient precision optical computing techniques 1D inverse discrete wavelet transform optical computers, logic elements, and interconnects high data rate image processing applications RNS-FPL merged architectures sustained throughput field programmable gate arrays image processing input data Computer vision and image processing techniques Image processing and restoration orthogonal DWT optical, image and video signal processing discrete wavelet transforms orthogonal 1D discrete wavelet transform easily scalable residue number system optical logic devices and optical computing techniques optical logic elements

来源：评论

学校读者我要写书评

暂无评论

All-optical travelling wave modulation inverter

引用

ELECTRONICS LETTERS 2000年第16期36卷 1406-1408页

作者： Symul, T Bencheikh, K Lovering, D Levenson, JA CNRS URA 250 Lab CDP FTRD F-92225 Bagneux France

It is demonstrated that a Kerr-like medium associated with a phase-sensitive parametric amplifier is able to work as an all optical modulation controlled inverter for travelling waves. The controlled operation is perf... 详细信息

关键词： Kerr-like medium optical parametric amplifiers optical self-focusing and related effects optical logic optical computing techniques optical pumping optical computers, logic elements, and interconnects Modulation and coding methods optical communication devices, equipment and systems optical Kerr effect controlled operation all optical modulation controlled inverter optical communication equipment travelling waves optical harmonic generation, frequency conversion, parametric oscillation and amplification optical beam modulators optical communication equipment Beam trapping, self focusing, thermal blooming, and related effects optical modulation amplifier pump modulation optical logic devices and optical computing techniques logic gates optical logic elements all-optical travelling wave modulation inverter phase-sensitive parametric amplifier

来源：评论

学校读者我要写书评

暂无评论

Demonstration of highly scalable 100Gbit/s OTDM computer interconnect with rapid interchannel switching capability

引用

ELECTRONICS LETTERS 1998年第25期34卷 2418-2419页

作者： Deng, KL Runser, RJ Toliver, P Coldwell, C Zhou, D Glesk, I Prucnal, PR Princeton Univ Dept Elect Engn Princeton NJ 08544 USA

An experimental demonstration of an error free 100 Gbit/s optical rime division multiplexing (OTDM) broadcast star multiprocessor interconnect is presented. A highly scalable novel node design provides rapid interchan... 详细信息

关键词： 100 Gbit/s Multiplexing and switching in optical communication optical interconnections optical computing OTDM computer interconnect optical logic devices and optical computing techniques optical computing techniques interchannel switching optical time division multiplexing broadcast star multiprocessor interconnect time division multiplexing multiprocessor interconnection networks scalable node design

来源：评论

学校读者我要写书评

暂无评论

NOVEL NONRESONANT OPTOELECTRONIC LOGIC DEVICE

引用

ELECTRONICS LETTERS 1987年第2期23卷 92-93页

作者： WHEATLEY, P BRADLEY, PJ WHITEHEAD, M PARRY, G MIDWINTER, JE MISTRY, P PATE, MA ROBERTS, JS UNIV SHEFFIELD DEPT ELECTR ENGNSHEFFIELD S1 3JDS YORKSHIREENGLAND

We report the first demonstration of a novel optical logic device having an inverting characteristic which displays hard-limiting and optical gain of more than 10.

关键词： hard-limiting optical logic device optical information processing integrated optoelectronics Integrated optoelectronics nonresonant optoelectronic logic device logic gates optical computing techniques demonstration optical gain inverting characteristic

来源：评论

学校读者我要写书评

暂无评论

All-optical inverted operational amplifier derived from negative nonlinear feedback systems

引用

ELECTRONICS LETTERS 2000年第13期36卷 1138-1139页

作者： Maeda, V Toyota Technol Inst Dept Informat & Control Engn Tempa Ku Nagoya Aichi 4688511 Japan

An all-optical inverted operational amplifier that has the characteristic of bring both an optical inverter and an amplifier designed based on the negative nonlinear absorption effect has been realised by using an erbium-doped fibre amplifier with a feedback ring resonator. A NOR-type logic gate operation has treen demonstrated using two optical signals of 1.53 mu m.

关键词： erbium-doped fibre amplifier optical logic optical computing techniques optical computers, logic elements, and interconnects operational amplifiers negative nonlinear absorption effect Fibre lasers and amplifiers optical feedback negative nonlinear feedback systems feedback ring resonator optical inverter 1.53 micrometre optical fibre amplifiers circuit feedback NOR-type logic gate operation all-optical inverted operational amplifier optical logic devices and optical computing techniques logic gates optical logic elements optical signals

来源：评论

学校读者我要写书评

暂无评论

Space-CDMA based 2D parallel optical transmission over record length (100m) long image fibre

引用

ELECTRONICS LETTERS 1998年第11期34卷 1126-1127页

作者： Nakamura, M Kitayama, K Igasaki, Y Kaneda, K Minist Post & Telecommun Commun Res Lab Tokyo 1848795 Japan Hamamatsu Photon KK Shizuoka Japan Fujikura Ltd Chiba 285 Japan

Space code division multiple access (CDMA)based 2D parallel optical transmission over a record length (100 m) long image fibre is demonstrated. Four 2 x 2 bit-planes encoded by 8 x 8 signature patterns are multiplexed and transmitted over a 100 m long image fibre, Each receiver can regenerate an intended bit-plane by optically correlating the received signal with the corresponding signature pattern, This opens up the application to high throughput massively parallel processor data links.

关键词： throughput Other data communication equipment and techniques long image fibre received signal optical computing techniques optical communication 8×8 signature patterns 2×2 bit-planes data communication 2D parallel optical transmission Multiprocessing systems Computer communications optical fibre communication space-CDMA based system Fibre optics 100 m space division multiplexing massively parallel processor data links optical links signature pattern code division multiple access parallel processing

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：