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Jae S. Lim. Thornbrue, James R. (James Raymond), 1976- Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science 2006-03-24T16:08:21Z 2006-03-24T16:08:21Z 2003 2003 http://hdl.handle.net/1721.1/29618 53237153 Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003. Includes bibliographical references (p. 115-116). Prior research indicates that a scalable video codec based on adaptive format conversion (AFC) information may be ideally suited to meet the demands of the migration path for high-definition television. Most scalable coding schemes use a single format conversion technique and encode residual information in the enhancement layer. Adaptive format conversion is different in that it employs more than one conversion technique. AFC partitions a video sequence into small blocks and selects the format conversion filter with the best performance in each block. Research shows that the bandwidth required for this type of enhancement information is small, yet the improvement in video quality is significant. This thesis focuses on the migration from 10801 to 1080P using adaptive deinterlacing. Two main questions are answered. First, how does adaptive format conversion perform when the base layer video is compressed in a manner typical to high-definition television? It was found that when the interlaced base layer was compressed to 0.3 bpp, the mean base layer PSNR was 32 dB and the PSNR improvement due to the enhancement layer was as high as 4 dB. Second, what is the optimal tradeoff between base layer and enhancement layer bandwidth? With the total bandwidth fixed at 0.32 bpp, it was found that the optimal bandwidth allocation was about 96% base layer, 4% enhancement layer using fixed, 16x16 pixel partitions. The base and enhancement layer video at this point were compared to 100% base layer allocation and the best nonadaptive format conversion. While there was usually no visible difference in base layer quality, the adaptively deinterlaced enhancement layer was generally sharper, with cleaner edges, less flickering, and fewer aliasing artifacts than the best nonadaptive method. Although further research is needed, the results of these experiments support the idea of using adaptive deinterlacing in the HDTV migration path. by James R. Thornbrue. S.M. 116 p. 10386263 bytes 10400185 bytes application/pdf application/pdf eng Massachusetts Institute of Technology M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 Electrical Engineering and Computer Science. Adaptive format conversion information as enhancement data for the high-definition television migration path AFC information as enhancement data for the HDTV migration path Thesis application/pdf false Publication unknown unknown <Publication xmlns="https://www.openaire.eu/cerif-profile/1.1/" id="c46a3bad-66dd-4def-8c22-075727eda047"> <Type xmlns="https://www.openaire.eu/cerif-profile/vocab/COAR_Publication_Types">http://purl.org/coar/resource_type/c_1843</Type> <Language>eng</Language> <Title>Adaptive format conversion information as enhancement data for the high-definition television migration path</Title> <Subtitle>AFC information as enhancement data for the HDTV migration path</Subtitle> <PublishedIn> <Publication> </Publication> </PublishedIn> <PublicationDate>2003</PublicationDate> <Authors> <Author> <DisplayName>Thornbrue, James R. (James Raymond), 1976-</DisplayName> <Affiliation> <OrgUnit> </OrgUnit> </Affiliation> </Author> </Authors> <Editors> </Editors> <Publishers> <Publisher> <DisplayName>Massachusetts Institute of Technology</DisplayName> <OrgUnit /> </Publisher> </Publishers> <License>http://dspace.mit.edu/handle/1721.1/7582</License> <Keyword>Electrical Engineering and Computer Science.</Keyword> <Abstract>Prior research indicates that a scalable video codec based on adaptive format conversion (AFC) information may be ideally suited to meet the demands of the migration path for high-definition television. Most scalable coding schemes use a single format conversion technique and encode residual information in the enhancement layer. Adaptive format conversion is different in that it employs more than one conversion technique. AFC partitions a video sequence into small blocks and selects the format conversion filter with the best performance in each block. Research shows that the bandwidth required for this type of enhancement information is small, yet the improvement in video quality is significant. This thesis focuses on the migration from 10801 to 1080P using adaptive deinterlacing. Two main questions are answered. First, how does adaptive format conversion perform when the base layer video is compressed in a manner typical to high-definition television? It was found that when the interlaced base layer was compressed to 0.3 bpp, the mean base layer PSNR was 32 dB and the PSNR improvement due to the enhancement layer was as high as 4 dB. Second, what is the optimal tradeoff between base layer and enhancement layer bandwidth? With the total bandwidth fixed at 0.32 bpp, it was found that the optimal bandwidth allocation was about 96% base layer, 4% enhancement layer using fixed, 16x16 pixel partitions. The base and enhancement layer video at this point were compared to 100% base layer allocation and the best nonadaptive format conversion. While there was usually no visible difference in base layer quality, the adaptively deinterlaced enhancement layer was generally sharper, with cleaner edges, less flickering, and fewer aliasing artifacts than the best nonadaptive method. Although further research is needed, the results of these experiments support the idea of using adaptive deinterlacing in the HDTV migration path.</Abstract> <Access xmlns="http://purl.org/coar/access_right" > </Access> </Publication>