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2nd International Congress on Image and Signal Processing

作者： Wang, Shuhui Lin, Tao Tongji Univ VLSI Lab Shanghai 200092 Peoples R China

ISBN: (纸本)9781424441303

This paper proposes a Unified LZ and hybrid coding (ULHC) method for compound image and video compression. The method is macroblock-based. Each macroblock is first coded simultaneously by both H.264 and gzip, then rate-distortion optimization is used to select either H.264 coding or gzip coding as the final coding of the macroblock. To improve the compression performance of ULHC, gzip uses the most recent 32k bytes of reconstructed macroblock data as the dictionary. Moreover, deblocking is disabled if at least one macroblock in an image is coded by gzip. Experimental results show that for images composed of natural video picture, text, and graphics, the proposed method provides up to 18 dB higher PSNR than H.264, while for text and graphics mixed images, the rate-distortion performance improvement is more significant. Another important feature is that ULHC can achieve partial-lossless and partial-near-lossless coding with a very high compression ratio, typically over 18.

关键词： compound image and video LZ hybrid coding rate-distortion optimization partial-lossless

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Video watermarking combining with hybrid coding scheme 6

Video watermarking combining with hybrid coding scheme

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6th International Conference on Signal Processing

作者： Liang, JX Hu, B Fudan Univ Dept EE Shanghai 200433 Peoples R China

ISBN: (纸本)0780374886

A watermarking scheme combining with hybrid video coding is proposed in this pap er. The intra-coded frame, which is called intra-frame, is blocked and discrete cosine transformed (DCT), watermark is embedded in the low-frequency coefficients in DCT domain. While for the intercoded frame, the blocked motion compensation is discrete cosine transformed as in I frame, then the DC coefficient in the DCT matrix is watermarked. In out scheme, perceptual model is considered, and the spread spectrum technology is borrowed from communication theory when watermark is embedded into the DCT coefficients. The watermark detection is based on the correlation and hypothesis testing, and the union detection of multidimensional watermark improved the performance of watermark detection.

关键词： digital watermark copyright protection spread spectrum MPEG-2 H.263 hybrid coding

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Electric Field Calculation of the Improved Charge Simulation Method Based on hybrid coding

Electric Field Calculation of the Improved Charge Simulation...

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Chinese Automation Congress (CAC)

作者： Wang, Yawei Lv, Changzhi Shandong Univ Sci & Technol Coll Elect Engn & Automat Qingdao Peoples R China

ISBN: (纸本)9781728140940

In order to avoid the tedious charges adjustment of the traditional charge simulation method (CSM), and reduce the potential error, the paper proposes the improved charge simulation method (ICSM) on the basis of hybrid coding to calculate the electric field. In the method, it needs to set the number of the matching points more than the simulation charges. The new initial population of genetic algorithm introduces the simulation charges information and constructs hybrid coding and the corresponding genetic operators to obtain the location and charge of the improved simulation charges. Finally, the improved simulation charges information is applied to the calculation of the electric field under the transmission line, which provides a theoretical basis for the optimal calculation of electric field.

关键词： improved charge simulation method (ICSM) improved genetic algorithm hybrid coding the ring simulation charges electric field

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Joint Source-Channel Secrecy Using hybrid coding

Joint Source-Channel Secrecy Using Hybrid Coding

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IEEE International Symposium on Information Theory (ISIT)

作者： Song, Eva C. Cuff, Paul Poor, H. Vincent Princeton Univ Dept Elect Engn Princeton NJ 08544 USA

ISBN: (纸本)9781467377041

The secrecy performance of a source-channel model is studied in the context of lossy source compression over a noisy broadcast channel. The source is causally revealed to the eavesdropper during decoding. The fidelity of the transmission to the legitimate receiver and the secrecy performance at the eavesdropper are both measured by a distortion metric. Two achievability schemes using the technique of hybrid coding are analyzed and compared with an operationally separate source channel coding scheme. A numerical example is provided and the comparison results show that the hybrid coding schemes outperform the operationally separate scheme.

关键词： hybrid coding likelihood encoder joint source-channel coding secrecy wiretap channel

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hybrid coding PSO-ACO CO-EVOLUTIONARY ALGORITHM FOR SOLVING MIXED-INTEGER PROGRAMMING PROBLEMS

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ASIA-PACIFIC JOURNAL OF OPERATIONAL RESEARCH 2013年第3期30卷

作者： Gao, Yuelin Wang, Miaomiao Beifang Univ Nationalities Sch Informat & Computat Sci Yinchuan 750021 Peoples R China

A co-evolutionary algorithm based on particle swarm optimization (PSO) and ant colony optimization (ACO) is given to solve the bound constrained mixed-integer programming problem (BCMIP). For the specificity of the problem, the hybrid coding includes the real coding and the integer coding. The real coding part is evolved by PSO while the integer coding part is evolved by ACO. The entire population is co-evolved by PSO and ACO. Numerical experiments show that the proposed algorithm is feasible and effective to solve BCMIP. We also obtain satisfactory result to solve MIP when the proposed algorithm is combined with penalty function method.

关键词： Mixed-integer programming (MIP) particle swarm optimization (PSO) ant colony optimization (ACO) co-evolutionary hybrid coding

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Bstj 48: 3. March 1969: a hybrid coding Scheme for Discrete Memoryless Channels. (Falconer, D.D.)

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2016年

Bstj 48: 3. March 1969: a hybrid coding Scheme for Discrete Memoryless Channels. (Falconer, D.D.) by published by

关键词： (falconer, bell system block block length channel channels. coding coding scheme computation computation units d.d.) decoder decoding hybrid hybrid coding probability sequential sequential decoding serial serial block super super block super blocks system technical

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hybrid coding algorithm for digital protection of video image

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JOURNAL OF DISCRETE MATHEMATICAL SCIENCES & CRYPTOGRAPHY 2018年第3期21卷 749-754页

作者： Quan, Shifeng Shanghai Lib Shanghai 200031 Peoples R China

In traditional coding algorithm, sampling and compressing are used to reduce the utilization of sampling data, without taking into account the visual redundancy of human eyes. Therefore, a hybrid coding algorithm based on wavelet zerotree and fractal is proposed. Firstly, the concept of wavelet zero tree and fractal is explained. According to the gradient formula, the blocks of video image after segmentation are divided into 3 kinds, and the coding of image blocks is transformed into wavelet domain. At the same time, the wavelet coefficients of all the restored wavelet coefficients are transformed to obtain the reconstructed image. The experimental results show that the algorithm enlarges the range of search space, enriches the diversity of coding, and improves the global search ability of the algorithm, which has some application value.

关键词： Video image Digital protection Data hybrid coding

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Visual Terrain Classification Methods for Mobile Robots Using hybrid coding Architecture

Visual Terrain Classification Methods for Mobile Robots Usin...

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International Conference on Image, Vision and Computing (ICIVC)

作者： Hang Wu Wenchang Zhang Boyang Li Yucao Sun Deguang Duan Ping Chen Institute of Medical Support Technology Academy of Military Sciences of Chinese PLA Tianjin China National Innovation Institute of Defense Technology Academy of Military Sciences of Chinese PLA Beijing China Zhonghuan Information College Tianjin University of technology Tianjin China

ISBN: (纸本)9781728123264

Visual terrain classification can provide crucial and important information for motion control and autonomous navigation for mobile robots in complex terrain environment, becoming an important but challenging task. This paper uses a novel hybrid coding architecture, Deep Filter Banks (DFB), combining stacked denoising sparse autoencoder (SDSAE) and Fisher Vector (FV) for visual terrain classification. Then, we propose a terrain dataset, termed "Terrain8", which is the first publicly available benchmark for visual terrain classification. This dataset contains 2400 terrain images, covering 8 terrain classes with 300 images in each class. Our method achieves superior performance on the Terrain8 dataset. Moreover, we design the framework to deal with terrain videos and carry out the field experiments in arc-legged mobile robot. The field experimental results also indicate the effectiveness of our proposed methods.

关键词： Visual terrain classification Terrain dataset Deep filter banks Fisher vector Arc-legged mobile robot terrain classification Mobile robots hybrid coding field experimentation terrains autonomous navigation Motor Control Visualization

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Color Image hybrid coding Based on Square Bezier Surface

Color Image Hybrid Coding Based on Square Bezier Surface

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2011 International Conference on Fuzzy Systems and Neural Computing(FSNC 2011)

作者： Chen Yutuo Zhao Zhiyuan Fei Yongchao Wu Meijie School of Computer Science and Information Engineering Central South University of Forestry & Technology

To analyze and obtain the values and position of characterwastic pixels in one of color components of image subregion,and these parameters are used to build the square Bezier surface patches of the ***,the coding for this color component becomes the coding of the feature *** other two components are coding based on the calculated correlation coefficients between three components in the same *** results show that this method is of high coding and decoding rates,and with quite good compression rate and visual quality.

关键词： color components hybrid coding square Bezier surface correlation coefficient

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Generalized hybrid Intra and Wyner-Ziv Video coding

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS FOR VIDEO TECHNOLOGY 2011年第12期21卷 1929-1934页

作者： Benierbah, Said Khamadja, Mohammed Mentouri Univ Constantine Dept Elect SP Lab Constantine 25017 Algeria

The hybrid Wyner-Ziv (WZ) and intra video coding system has many interesting features, like the possibility to perform real motion estimation, at the decoder, and low latency coding. In this letter, we present an improved system and we will generalize it to include the other types of WZ coding. Thus, we propose a new quantization and a new cyclic redundancy check checking technique and, most importantly, we propose many new coding modes to produce a more efficient system that exploits the strong features of each type. The resulting system can thus produce many types of hybrid frames and allows mode adaptive coding. The simulation results show an improvement of the rate-distortion efficiency and can largely outperform those of state of the art.

关键词： coding modes hybrid coding quantization Wyner-Ziv coding

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