Motion compensated video coding
The result of many years of international co-operation in video coding has been the development of algorithms that remove interframe redundancy, such that only changes in the image that occur over a given time are encoded for transmission to the recipient. The primary process used here is the deriva...
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| Format: | Thesis (University of Nottingham only) |
| Language: | English |
| Published: |
1995
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| Online Access: | https://eprints.nottingham.ac.uk/13447/ |
| _version_ | 1848791735615881216 |
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| author | Garnham, Nigel William |
| author_facet | Garnham, Nigel William |
| author_sort | Garnham, Nigel William |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The result of many years of international co-operation in video coding has been the development of algorithms that remove interframe redundancy, such that only changes in the image that occur over a given time are encoded for transmission to the recipient. The primary process used here is the derivation of pixel differences, encoded in a method referred to as Differential Pulse-Coded Modulation (DPCM)and this has provided the basis of contemporary research into low-bit rate hybrid codec schemes. There are, however, instances when the DPCM technique cannot successfully code a segment of the image sequence because motion is a major cause of interframe differences. Motion Compensation (MC) can be used to improve the efficiency of the predictive coding algorithm.
This thesis examines current thinking in the area of motion-compensated video compression and contrasts the application of differing algorithms to the general requirements of interframe coding. A novel technique is proposed, where the constituent features in an image are segmented, classified and their motion tracked by a local search algorithm. Although originally intended to complement the DPCM method in a predictive hybrid codec, it will be demonstrated that the evaluation of feature displacement can, in its own right, form the basis of a low bitrate video codec of low complexity.
After an extensive discussion of the issues involved, a description of laboratory simulations shows how the postulated technique is applied to standard test sequences. Measurements of image quality and the efficiency of compression are made and compared with a contemporary standard method of low bitrate video coding. |
| first_indexed | 2025-11-14T18:33:14Z |
| format | Thesis (University of Nottingham only) |
| id | nottingham-13447 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T18:33:14Z |
| publishDate | 1995 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-134472025-02-28T11:25:14Z https://eprints.nottingham.ac.uk/13447/ Motion compensated video coding Garnham, Nigel William The result of many years of international co-operation in video coding has been the development of algorithms that remove interframe redundancy, such that only changes in the image that occur over a given time are encoded for transmission to the recipient. The primary process used here is the derivation of pixel differences, encoded in a method referred to as Differential Pulse-Coded Modulation (DPCM)and this has provided the basis of contemporary research into low-bit rate hybrid codec schemes. There are, however, instances when the DPCM technique cannot successfully code a segment of the image sequence because motion is a major cause of interframe differences. Motion Compensation (MC) can be used to improve the efficiency of the predictive coding algorithm. This thesis examines current thinking in the area of motion-compensated video compression and contrasts the application of differing algorithms to the general requirements of interframe coding. A novel technique is proposed, where the constituent features in an image are segmented, classified and their motion tracked by a local search algorithm. Although originally intended to complement the DPCM method in a predictive hybrid codec, it will be demonstrated that the evaluation of feature displacement can, in its own right, form the basis of a low bitrate video codec of low complexity. After an extensive discussion of the issues involved, a description of laboratory simulations shows how the postulated technique is applied to standard test sequences. Measurements of image quality and the efficiency of compression are made and compared with a contemporary standard method of low bitrate video coding. 1995-12 Thesis (University of Nottingham only) NonPeerReviewed application/pdf en arr https://eprints.nottingham.ac.uk/13447/1/thesis.pdf Garnham, Nigel William (1995) Motion compensated video coding. PhD thesis, University of Nottingham. Video coding motion compensation low bit rate image compression |
| spellingShingle | Video coding motion compensation low bit rate image compression Garnham, Nigel William Motion compensated video coding |
| title | Motion compensated video coding |
| title_full | Motion compensated video coding |
| title_fullStr | Motion compensated video coding |
| title_full_unstemmed | Motion compensated video coding |
| title_short | Motion compensated video coding |
| title_sort | motion compensated video coding |
| topic | Video coding motion compensation low bit rate image compression |
| url | https://eprints.nottingham.ac.uk/13447/ |