The design, implementation and analysis of a wavelet-based video codec

 

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dc.contributor.advisor De Jager, Gerhard en_ZA
dc.contributor.author Servais, Marc Paul en_ZA
dc.date.accessioned 2014-11-18T16:58:24Z
dc.date.available 2014-11-18T16:58:24Z
dc.date.issued 1998 en_ZA
dc.identifier.citation Servais, M. 1998. The design, implementation and analysis of a wavelet-based video codec. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/9697
dc.description Includes bibliographical references. en_ZA
dc.description.abstract The Wavelet Transform has been shown to be highly effective in image coding applications. This thesis describes the development of a new wavelet-based video compression algorithm which is based on the 3D wavelet transform, and requires no complicated motion estimation techniques. The proposed codec processes a sequence of images in a group of frames (GOF) by first transforming the group spatially and temporally, in order to obtain a GOF of 3D approximation and detail coefficients. The codec uses selective prediction of temporal approximation coefficients in order to decorrelate transformed GOFs. Following this, a modified version of Said and Pearlman's image coding technique of Set Partitioning in Hierarchical Trees is used as a method for encoding the transformed GOF. The compression algorithm has been implemented in software, and tested on seven test sequences at different bit-rates. Experimental results indicate a significantly improved performance over MPEG 1 and 2 in terms of picture quality, for sequences filmed with a stationary camera. The codec also performs well on scenes filmed with a moving camera, provided that there is not a large degree of spatial detail present. In addition, the proposed codec has several attractive features. It performs well without entropy coding, and does not require any computationally-expensive motion estimation methods, such as those used by MPEG. Finally, a substantial advantage is that the encoder generates a bit-stream which allows for the progressive transmission of video, making it well-suited to use in video applications over digital networks. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Engineering en_ZA
dc.title The design, implementation and analysis of a wavelet-based video codec en_ZA
dc.type Thesis / Dissertation en_ZA
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering & the Built Environment en_ZA
dc.publisher.department Department of Electrical Engineering en_ZA
dc.type.qualificationlevel Masters en_ZA
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image


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