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Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/1476

Title: Color quantization of compressed video sequences
Authors: Cheung, Wan-fung
Chan, Yuk-hee
Subjects: Color display
Color palette
Color quantization
Compressed domain video processing
Compressed video
Cumulative color histogram
DC sequence
Issue Date: Mar-2003
Publisher: IEEE
Citation: IEEE transactions on circuits and systems for video technology, Mar. 2003, v. 13, no. 3, p. 270-276.
Abstract: This paper presents a novel color quantization algorithm for compressed video data. The proposed algorithm extracts discrete cosine (DC) transform coefficients and motion vectors of blocks in a shot to estimate a cumulative color histogram of the shot and, based on the estimated histogram, design a color palette for displaying the video sequence in the shot. It significantly reduces the complexity of the generation of a palette by effectively reducing the number of training vectors used in training a palette without sacrificing the quality. The palette obtained can provide a good display quality even if zooming and panning exist in a shot. The experimental results show that the proposed method can achieve a significant signal-to-noise ratio improvement as compared with conventional video color-quantization schemes when zooming and panning are encountered in a shot.
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This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
Type: Journal/Magazine Article
URI: http://hdl.handle.net/10397/1476
ISSN: 1051-8215
Appears in Collections:EIE Journal/Magazine Articles

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