Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.543277
Title: Perceptual quality estimation techniques for 2D and 3D videos
Author: Joveluro, Prince
ISNI:       0000 0004 2713 0104
Awarding Body: University of Surrey
Current Institution: University of Surrey
Date of Award: 2011
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Abstract:
Information dissemination in today’s rapidly advancing world has been largely based on multimedia. With the advancement of delivery technology, information is readily available from homes to offices, down to the remotest parts of the world. With this availability comes the need for assessment of user satisfaction and quality of experience. In the last few decades multimedia has changed from been just for entertainment to being a necessity, which is now affordable to all class of individuals in the society; thanks to advancing technology which has found cheaper ways to do things. Video coding has made it easier for delivery of visual information either for storage or for transmission. Video coding involves the use of video coding tools for exploitation of redundant or content information in video sequences for compression. This reduces the size of the video sequence, thereby utilising less storage space and less bandwidth for transmission. However, compression of video sequences whether 2D or 3D videos, is not without problems. Compression of video sequences reduces the size and the quality of the video sequences by introduction of video artefacts. Therefore, there is need for quality assessment of compressed videos for better user satisfaction and experience. This need has resulted in research into objective metrics for video quality assessment. In this thesis, several methods has been implemented for quality assessment of videos whether for transmission or for storage. Firstly, a perceptual based quality metric is proposed for evaluation of 2D and 3D videos. This metric Uses only the luminance component for quality evaluation, which makes it less complex compared to other metrics. Secondly, a reduced reference metric is proposed for quality assessment for video transmission using a mobile wireless network. This metric is a reduced reference metric that exploits the availability of the reference frame at the encoder for more accurate quality evaluation. Error concealment is implemented for videos transmitted over a mobile wireless network at different speeds; not utilising motion estimation techniques which is computationally expensive. Finally, a method for 3D quality assessment is implemented using a ratio of colour and depth 2D objective score to determine the 3D quality which differs from the method in chapter 2 which uses the left and right average 2D objective score to determine quality.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.543277  DOI: Not available
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