Download or read book Computational RAM Implementations of Vector Quantization for Image and Video Compression written by Thinh Minh Le and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, Computational$\sp*$RAM (C$\sp*$RAM) implementations of Vector Quantization for image and video compression is proposed. Vector Quantization (VQ) is a powerful technique for low bit rate image and video compression. The coding performance can be further improved by employing the adaptive techniques at the expense of significant increase in computational complexity. Recently, a number of VLSI architectures for implementing VQ have been reported in the literature. These architectures are not programmable and rather complex. We proposed the mapping of VQ-based image and video compression algorithms on the C$\sp*$RAM architecture. C$\sp*$RAM is a SIMD-memory hybrid where the processing elements are attached to memory columns of a conventional RAM to take advantage of the on-chip high memory bandwidth for parallel computation. Implementation of VQ based on the mean absolute error measure using the C$\sp*$RAM's parallel structure is first presented. This follows with the details of the proposed Modified Scalable VQ algorithm. C$\sp*$RAM implementation of Modified SVQ is a mapping of binary tree onto parallel structure which results in scalable bit stream. We then propose a novel adaptive codebook replenishment VQ and index-based motion estimation (AVQ + ME) algorithm for video compression. Finally, the C$\sp*$RAM implementation of AVQ + ME is presented. Simulation results demonstrate a good coding performance at a significantly reduced computational complexity.
Download or read book Vector Quantization and Signal Compression written by Allen Gersho and published by Springer Science & Business Media. This book was released on 1991-11-30 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Herb Caen, a popular columnist for the San Francisco Chronicle, recently quoted a Voice of America press release as saying that it was reorganizing in order to "eliminate duplication and redundancy. " This quote both states a goal of data compression and illustrates its common need: the removal of duplication (or redundancy) can provide a more efficient representation of data and the quoted phrase is itself a candidate for such surgery. Not only can the number of words in the quote be reduced without losing informa tion, but the statement would actually be enhanced by such compression since it will no longer exemplify the wrong that the policy is supposed to correct. Here compression can streamline the phrase and minimize the em barassment while improving the English style. Compression in general is intended to provide efficient representations of data while preserving the essential information contained in the data. This book is devoted to the theory and practice of signal compression, i. e. , data compression applied to signals such as speech, audio, images, and video signals (excluding other data types such as financial data or general purpose computer data). The emphasis is on the conversion of analog waveforms into efficient digital representations and on the compression of digital information into the fewest possible bits. Both operations should yield the highest possible reconstruction fidelity subject to constraints on the bit rate and implementation complexity.
Download or read book Masters Abstracts International written by and published by . This book was released on 1996 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Algorithm and Architecture for Video Compression written by Fayez M. Idris and published by . This book was released on 1993 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: We note that both VQ and motion estimation algorithms are essentially template matching operations. However, they are compute intensive necessitating the use of special purpose architectures for real-time implementation. Associative memories are efficient for template matching in parallel. We propose an unified associative memory architecture for real implementation of VC-FAVQ. This architecture is based on a novel storage concept where image data is stored by association rather than by contents. The architecture has the advantages of simplicity, partitionability and modularity and is hence suitable for VLSI implementation.
Download or read book Image and Video Compression written by Madhuri A. Joshi and published by CRC Press. This book was released on 2014-11-17 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Image and video signals require large transmission bandwidth and storage, leading to high costs. The data must be compressed without a loss or with a small loss of quality. Thus, efficient image and video compression algorithms play a significant role in the storage and transmission of data. Image and Video Compression: Fundamentals, Techniques, and Applications explains the major techniques for image and video compression and demonstrates their practical implementation using MATLAB® programs. Designed for students, researchers, and practicing engineers, the book presents both basic principles and real practical applications. In an accessible way, the book covers basic schemes for image and video compression, including lossless techniques and wavelet- and vector quantization-based image compression and digital video compression. The MATLAB programs enable readers to gain hands-on experience with the techniques. The authors provide quality metrics used to evaluate the performance of the compression algorithms. They also introduce the modern technique of compressed sensing, which retains the most important part of the signal while it is being sensed.
Download or read book Techniques and Standards for Image Video and Audio Coding written by Kamisetty Ramamohan Rao and published by . This book was released on 1996 with total page 608 pages. Available in PDF, EPUB and Kindle. Book excerpt: As multimedia applications become more prevalent, the files travelling the net are getting bigger and slower. One way in which to compensate for this is by coding and compressing files. This book looks at the international standards used
Download or read book Image and Video Compression Standards written by Vasudev Bhaskaran and published by Springer. This book was released on 1995-09-30 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Image and Video Compression Standards: Algorithms and Architectures presents an introduction to the algorithms and architectures that underpin the image and video compression standards, including JPEG (compression of still images), H.261 (video teleconferencing), MPEG-1 and MPEG-2 (video storage and broadcasting). In addition, the book covers the MPEG and Dolby AC-3 audio encoding standards, as well as emerging techniques for image and video compression, such as those based on wavelets and vector quantization. The book emphasizes the foundations of these standards, i.e. techniques such as predictive coding, transform-based coding, motion compensation, and entropy coding, as well as how they are applied in the standards. How each standard is implemented is not dealt with, but the book does provide all the material necessary to understand the workings of each of the compression standards, including information that can be used to evaluate the efficiency of various software and hardware implementations conforming to the standards. Particular emphasis is placed on those algorithms and architectures that have been found to be useful in practical software or hardware implementations. Audience: A valuable reference for the graduate student, researcher or engineer. May also be used as a text for a course on the subject.
Download or read book Hardware Implementations for Image Compression by Vector Quantization written by James Burton Cahoon and published by . This book was released on 1989 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multimedia Hardware Architectures written by and published by . This book was released on 1998 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Vector Quantization written by Hüseyin Abut and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1990 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ratschlag betreffend die Belagserneuerung in der Austrasse zwischen der Holbeinstrasse und der Sch tzenmattstrasse und die Verlegung der Bushaltestellen an der Leimenstrasse bei der Einm ndung in die Austrasse written by and published by . This book was released on 1966 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book On Effective Compression Using Vector Quantization and Pyramid Processing written by Zhongxiu Wen and published by . This book was released on 1989 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vector quantization (VQ) is an effective spatial domain image compression technique which maps discrete k-dimensional vectors into a digital sequence suitable for communication or storage. This research investigates methods for improving the performance of vector quantization based on pyramid tools. An iterative optimization clustering VQ procedure based upon an initial codebook randomly sampled from the training set is presented. The main idea of the proposed algorithm is that a set of new cluster means is generated by using an iterative clustering algorithm, with the previous codewords as seeds. The training set is drawn from the present training images. The resulting cluster means are then used in a new codebook which is continually refined so that each iteration reduces the distortion involved in coding a given training set. The goal of such system is to reduce the bit rate so as to minimize communication channel capacity or digital storage memory requirement. This VQ can provide a reduction from 8 bits per pixel (bpp) to 2 bpp or 0.5 bpp with negligible degradation image quality. Vector quantization usually requires extensive computations. In this thesis both the pyramid processing and the fast algorithms are examined for vector quantization. After a brief introduction of the topic in Chapter 1, the history and fundamentals of vector quantization are presented in Chapter 2. Chapter 3 describes the concepts and techniques of pyramid image processing. A new VQ algorithm which is employed in the thesis is examined in Chapter 4. In Chapter 5 the importance of post-processing is emphasized with illustrative results. Even with post-processing the vector quantization method considered indeed provides a significantly better image compression over existing image compression technique.
Download or read book Image Compression Using Vector Quantization for VLSI Implementation written by C. S. Ramsay and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Intelligence for Remote Sensing written by Manuel Grana and published by Springer Science & Business Media. This book was released on 2008-06-05 with total page 397 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a composition of different points of view regarding the application of Computational Intelligence techniques and methods to Remote Sensing data and applications. It is the general consensus that classification, its related data processing, and global optimization methods are core topics of Computational Intelligence. Much of the content of the book is devoted to image segmentation and recognition, using diverse tools from different areas of the Computational Intelligence field, ranging from Artificial Neural Networks to Markov Random Field modeling. The book covers a broad range of topics, starting from the hardware design of hyperspectral sensors, and data handling problems, namely data compression and watermarking issues, as well as autonomous web services. The main contents of the book are devoted to image analysis and efficient (parallel) implementations of these analysis techniques. The classes of images dealt with throughout the book are mostly multispectral-hyperspectral images, though there are some instances of processing Synthetic Aperture Radar images.
Download or read book Novel Image Compression Methods Based on Vector Quantization written by M. Mary Shanthi Rani and published by LAP Lambert Academic Publishing. This book was released on 2014-12-22 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapid growth and development of electronic imaging in the recent years has led to large scale digital media archives. These are increasingly becoming popular as more and more digital media contents are created and deployed online every day. A critical issue in designing such archives is effective storage of the data. Uncompressed data requires more storage and huge bandwidth for transmission. Though the cost of storage is rapidly dropping, compression still remains as a challenging issue due to the growing number of multimedia based online applications. This necessitates the design of highly efficient image compression systems which promise good image quality and compression ratios with low computational complexity. This book is an outcome of the research in vector quantization based methods for compressing still images. It discusses novel image compression methods with performance analysis using standard compression metrics and their vital role in real-time applications. The proposed methods can be used in applications like Medical Image Processing, Mobile Applications, Biometrics, Remote Sensing and other online web applications.
Download or read book Image and Video Compression Using Advanced Vector Quantization Techniques written by Niall Fallon and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Video Compression Techniques written by Wofgang Effelsberg and published by Morgan Kaufmann. This book was released on 1998-10-22 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book assumes that the reader has a basic background in computing or engineering.
