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The design, implementation and analysis of a wavelet-based video codec
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
| Published: |
Department of Electrical Engineering
2014
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| _version_ | 1867613252003823616 |
|---|---|
| access_status_str | Open Access |
| author | Servais, Marc Paul |
| author2 | De Jager, Gerhard |
| author_browse | De Jager, Gerhard Servais, Marc Paul |
| author_facet | De Jager, Gerhard Servais, Marc Paul |
| author_sort | Servais, Marc Paul |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/9697 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:33:10.259Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2014 |
| publishDateRange | 2014 |
| publishDateSort | 2014 |
| publisher | Department of Electrical Engineering |
| publisherStr | Department of Electrical Engineering |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/9697 The design, implementation and analysis of a wavelet-based video codec Servais, Marc Paul De Jager, Gerhard Engineering Includes bibliographical references. 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. 2014-11-18T16:58:24Z 2014-11-18T16:58:24Z 1998 Master Thesis Masters MSc http://hdl.handle.net/11427/9697 eng application/pdf Department of Electrical Engineering Faculty of Engineering and the Built Environment University of Cape Town |
| spellingShingle | Engineering Servais, Marc Paul The design, implementation and analysis of a wavelet-based video codec |
| thesis_degree_str | Master's |
| title | The design, implementation and analysis of a wavelet-based video codec |
| title_full | The design, implementation and analysis of a wavelet-based video codec |
| title_fullStr | The design, implementation and analysis of a wavelet-based video codec |
| title_full_unstemmed | The design, implementation and analysis of a wavelet-based video codec |
| title_short | The design, implementation and analysis of a wavelet-based video codec |
| title_sort | design implementation and analysis of a wavelet based video codec |
| topic | Engineering |
| url | http://hdl.handle.net/11427/9697 |
| work_keys_str_mv | AT servaismarcpaul thedesignimplementationandanalysisofawaveletbasedvideocodec AT servaismarcpaul designimplementationandanalysisofawaveletbasedvideocodec |