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IEEE International Symposium on Information Theory (ISIT)

作者： Palaiyanur, Hari Sahai, Anant Univ Calif Berkeley Dept Elect Engn & Comp Sci Berkeley CA 94720 USA

ISBN: (纸本)9781457705953

In the study of error exponents, the Haroutunian exponent is encountered as an upper bound for several point-to-point communication problems over DMCs including block coding with feedback and fixed-delay coding. For symmetric channels, such as the BSC or BEC, the Haroutunian exponent is equal to the sphere-packing exponent. But for asymmetric channels, such as the Z-channel, the Haroutunian bound is strictly larger than the sphere-packing exponent. It is generally believed that the sphere-packing bound should hold for these problems, even though they are different from the problem of block coding without feedback. The fundamental difficulty in these problems is that the distribution of the input is not known during the error event, and unlike symmetric channels, there is no 'universally good' input distribution like the uniform distribution. The result is that a worst-case assumption is made on the input distribution to give the Haroutunian bound, even though the resulting input distribution is useless for communication purposes. In order to make progress on this issue, we study an extended notion of fixed-delay codes called anytime codes, a class of codes that indirectly enforce the property that nontrivial communication is attempted during the error event. For this class of codes, we give a new upper bound to the error exponent that strictly improves on the Haroutunian bound for asymmetric channels. While the new exponent still does not reach sphere-packing, we show that the ratio of the two exponents approaches 1 as the rate approaches capacity for Z-channels. This fact may have an interesting consequence for the viewpoint of maximum achievable rate for a given delay and desired error probability. Additionally, the improved exponent yields a tighter bound for a notion of sufficiency of a channel for control purposes.

关键词： block codes DMC Decoding Delay Error probability Haroutunian bound Haroutunian exponent Mutual information Reliability Upper bound Z-channels anytime coding systems asymmetric channels block coding channel coding delays error exponents error probability error statistics fixed-delay codes fixed-delay coding point-to-point communication problems sphere-packing exponent

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A Parity-Check Spectral R-Code

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Computational Mathematics and Modeling 2018年第2期29卷 228-232页

作者： Gurov, S.I. Faculty of Computational Mathematics and Cybernetics Moscow State University Moscow Russian Federation

This article introduces a parity-check code based on the Rademacher function. The error-correction model of the code corresponds to a binary symmetrical channel: bits may be inverted randomly and independently, but no bit insertion/bit omission occurs. The code corrects a single error;its redundancy and coding/decoding features are virtually identical with those of the Hamming code, but it has clear advantages for application of redundant coding in fault-tolerant integrated-circuit design. © 2018, Springer Science+Business Media, LLC, part of Springer Nature.

关键词： block coding combinational circuits fault tolerance parity-check codes Rademacher function

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Teaching Algorithms and Growing STEM with Sphero 24

Teaching Algorithms and Growing STEM with Sphero

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25th Annual Conference on Information Technology Education-SIGITE

作者： Mehicevic, Ammar Doloc-Mihu, Anca Robertson, Cindy Georgia Gwinnett Coll Lawrenceville GA 30043 USA

ISBN: (纸本)9798400711060

The primary goal of this project is to educate our audience about algorithms. We used Sphero, a fun and engaging robot sphere, to pique the interest of our participants with the intent of promoting STEM and Information Technology. By participating in our workshops, our audience experimented with *** and block coding, which allowed them to learn about algorithms through easily replicable examples. This project showed our workshop participants that programming can be fun. The workshop results proved that the audience had an increased interest in programming.

关键词： project-based learning teaching block coding critical thinking cs education it outreach programming online Sphero

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Tips and Tricks for Developing Successful Technology Projects for Introduction to Programming and Outreach 24

Tips and Tricks for Developing Successful Technology Project...

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25th Annual Conference on Information Technology Education-SIGITE

作者： Doloc-Mihu, Anca Robertson, Cindy Georgia Gwinnett Coll Lawrenceville GA 30043 USA

ISBN: (纸本)9798400711060

We are proposing a workshop that instructs the audience on how to develop fun and engaging projects involving different technologies. These types of projects can be used by faculty to introduce programming skills in the classroom, but they are also a fantastic resource for outreach activities. Students can create these projects as a way to develop and promote their technical skills. Presenters will also share best practices and allow for discussion in creating and then conducting these projects at their institution.

关键词： project-based learning teaching block coding critical thinking cs education it outreach programming

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Versatile visual pattern image coding system

Versatile visual pattern image coding system

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1995 Conference on Visual Communications and Imaging Processing (1995 VCIP)

作者： CHAN, KW CHAN, KL CITY UNIV HONG KONG DEPT ELECTR ENGNHONG KONGHONG KONG

ISBN: (纸本)0819418587

A full-fledged Visual Pattern Image coding system is developed. For high compression ratio, Uniform Patterns are merged by Quadtree merging. For high visual quality, a new set of 2 X 2 Edge Patterns are designed for near perfect reconstruction. By a classification scheme of 11 groups or a threshold of gradient magnitude, the performance profile can adapt to a wide variety of applications.

关键词： IMAGE coding VISUAL PATTERN QUADTREE HIERARCHICAL block coding

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Infrastructure-Dependent Wireless Multicast - Improving the Code Rate

Infrastructure-Dependent Wireless Multicast - Improving the ...

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18th IEEE Symposium on Computers and Communications (ISCC)

作者： Vella, Jean Marie Zammit, Saviour Univ Malta Dept Commun & Comp Engn Msida Malta

ISBN: (纸本)9781479937554

This paper shows how a novel infrastructure which makes use of the multiple antennas available on IEEE 802.11n Access Points can be combined with block erasure coding to multicast video with no packet loss. This paper also shows that this can be obtained while maintaining an efficient code rate, which is better than 1) packet repetition on the new infrastructure, 2) block erasure coding on the legacy infrastructure and 3) Leader-Based Protocols used on the legacy infrastructure. This study employs physical layer data rates of 52Mbps, 58.5Mbps and 65Mbps. Hence the infrastructure proposed solves also the "Performance Anomaly Problem" which results with legacy multicast that transmits the data using the most robust modulation and coding scheme.

关键词： Multicast Wireless Local Area Networks block coding IEEE 802.11n

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Bstj 47: 6. July-August 1968: Linear-Real Codes and Coders. (Pierce, William H.)

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2016年

Bstj 47: 6. July-August 1968: Linear-Real Codes and Coders. (Pierce, William H.) by published by

关键词： (pierce, bell system block coding clip estimator coders coders. codes decoded decoded noise equation error estimator filter july-august matrix noise noise power power amplification shift register signal square error system technical toeplitz unattenuated estimator

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COMPARISON OF ERASURE-AND-ERROR THRESHOLD DEcoding SCHEMES

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IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES 1993年第5期E76A卷 820-827页

作者： HASHIMOTO, T Univ of Electro-communications Chofu Japan

Erasure-and-error decoding is a general form of channel decoding and is a basis of important coding schemes, such as the concatenated coding scheme and coded ARQ. However, there do not exist enough discussions on the interrelationship between erasure-and-error decoding schemes. In this paper, threshold decoding schemes are discussed in a systematic manner and compared with Forney's optimal scheme. Some confusions in known results are pointed out and new results on threshold decoding are shown.

关键词： ERASURE-AND-ERROR DEcoding THRESHOLD DEcoding ERROR DETECTION coding block coding

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ON THE COMPRESSION OF IMAGE BASED RENDERING SCENE: A COMPARISON AMONG block, REFERENCE AND WAVELET CODERS

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International Journal of Image and Graphics 2001年第1期1卷 45-61页

作者： JIN LI HEUNG-YEUNG SHUM YA-QIN ZHANG Microsoft Research China 3F Beijing Sigma Center 49 Zhichun Road Haidian Beijing 100080 P. R. China

In image based rendering (IBR), a 3D scene is recorded through a set of photos which is then rendered to form novel views. Compression is essential to reduce the huge data amount of IBR. In this paper, we examine three categories of IBR compression algorithms: the block coder, the reference coder and the wavelet coder. We examine both the compression efficiency and the capability to render the compressed IBR bitstream in real-time. It is observed that the block coder consumes the least computation resource, however, its compression ratio is low. The reference coder achieves good compression ratio with reasonable computation complexity. The wavelet coder achieves the best compression ratio.

关键词： Image Based Rendering (IBR) Compression block coding Reference coding Wavelet

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Remote accessible laboratory for error controlled coding techniques with the labview software

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Procedia - Social and Behavioral Sciences 2010年第2期2卷 372-377页

作者： Berkay Erder Aynur Akar Technical Education Faculty Marmara University İstanbul 34180 Turkey

Whilst the laboratory works at faculties providing education on the field of electronics and communication support the technical knowledge of students, they also develop their implementation abilities. The fact that there is less equipment requiring advanced technologies in laboratories, enforces the students to group works and thus limits working time and their contribution to the experiments. Contemporary computer technology provides the possibility for establishing alternative laboratories, environments in which the students can perform implementations without the restrictions of location and time. In this work, real time remote accessible experiment sets are prepared regarding coding techniques with error control. It is provided that the students can connect to the web based laboratory system via any computer on the LAN and make experiments. In this laboratory, the student will perform real time implementations without the restriction of location and time and strengthen their theoretical knowledge.

关键词： LabVIEW Error Control coding Remote Accessible Laboratory WEB Based Learning block coding Convolutional coding Turbo coding

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