Wavelet Based Adaptive Vector Quantization for Image and Video Coding
Author: Stathis P. Voukelatos
Publisher:
Published: 1997
Total Pages: 0
ISBN-13:
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Author: Stathis P. Voukelatos
Publisher:
Published: 1997
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKAuthor: Subhasis Saha
Publisher:
Published: 2000
Total Pages: 354
ISBN-13:
DOWNLOAD EBOOKAuthor: Pankaj N. Topiwala
Publisher: Springer Science & Business Media
Published: 2006-04-18
Total Pages: 434
ISBN-13: 0306470438
DOWNLOAD EBOOKAn exciting new development has taken place in the digital era that has captured the imagination and talent of researchers around the globe - wavelet image compression. This technology has deep roots in theories of vision, and promises performance improvements over all other compression methods, such as those based on Fourier transforms, vectors quantizers, fractals, neural nets, and many others. It is this revolutionary new technology that is presented in Wavelet Image and Video Compression, in a form that is accessible to the largest audience possible. Wavelet Image and Video Compression is divided into four parts. Part I, Background Material, introduces the basic mathematical structures that underly image compression algorithms with the intention of providing an easy introduction to the mathematical concepts that are prerequisites for the remainder of the book. It explains such topics as change of bases, scalar and vector quantization, bit allocation and rate-distortion theory, entropy coding, the discrete-cosine transform, wavelet filters and other related topics. Part II, Still Image Coding, presents a spectrum of wavelet still image coding techniques. Part III, Special Topics in Still Image Coding, provides a variety of example coding schemes with a special flavor in either approach or application domain. Part IV, Video Coding, examines wavelet and pyramidal coding techniques for video data. Wavelet Image and Video Compression serves as an excellent reference and may be used as a text for advanced courses covering the subject.
Author: Jiebo Luo
Publisher:
Published: 1995
Total Pages: 308
ISBN-13:
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Publisher:
Published: 2000
Total Pages:
ISBN-13:
DOWNLOAD EBOOKThe object of this dissertation is to investigate rate-distortion optimization and to evaluate the prospects of adaptive vector quantization for digital video compression. Rate-distortion optimization aims to improve compression performance using discrete optimization algorithms. We first describe and classify algorithms that have been developed in the literature to date. One algorithms is extended in order to make it generally applicable; the correctness of this new procedure is proven. Moreover, we compare the complexity of the aforesaid algorithms, first implementation-independent and then by run-time experiments. Finally, we propose a technique to speed up one of the aforementioned algorithms. Adaptive vector quantization enables adaption to sources with unknown or non-stationary statistics. This feature is important for digital video data since the statistics of two subsequent frames is usually similar, but in the long run the general statistics of frames may change even if scene changes are neglected. We examine combinations of adaptive vector quantization with various state-of-the-art video compression techniques. First we present an adaptive vector quantization based codec that is able to encode and decode in real-time using current PC technology. This codec is rate-distortion optimized and adaptive vector quantization is applied in the wavelet transform domain. The organization of the wavelet coefficients is then made more efficient using adaptive partition techniques. Moreover, the main adaptability mechanism of adaptive vector quantization, the so-called codebook update, is studied. Finally, a combination of adaptive vector quantization and motion compensation is taken into consideration. We show that for very low bitrates adaptive vector quantization performs on prediction residual frames better or at least as well as discrete cosine transform coding.
Author: Won-Ha Kim
Publisher:
Published: 1997
Total Pages: 264
ISBN-13:
DOWNLOAD EBOOKAuthor: Madhuri A. Joshi
Publisher: CRC Press
Published: 2014-11-17
Total Pages: 228
ISBN-13: 1482228238
DOWNLOAD EBOOKImage 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
Author: Ahmad A. A. M. Bou-Shehri
Publisher:
Published: 1994
Total Pages: 204
ISBN-13:
DOWNLOAD EBOOKAuthor: Ya-Qin Zhang
Publisher: CRC Press
Published: 1999-05-25
Total Pages: 584
ISBN-13: 9780824719289
DOWNLOAD EBOOKDiscusses recent advances in the related technologies of multimedia computers, videophones, video-over-Internet, HDTV, digital satellite TV and interactive computer games. The text analyzes ways of achieving more effective navigation techniques, data management functions, and higher throughout networking. It synthesizes data on visual information venues, tracking the enormous commercial potential for new components and compatible systems.
Author: Yi Chen
Publisher:
Published: 2001
Total Pages: 218
ISBN-13:
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