Abstract
Pattern based video coding as an extra mode in H.264 has already established its superiority over the H.264 in low bit rate areas. A significant drawback of predefined regular shaped pattern-matching algorithms however, is that they fail to capture large numbers of active-region macroblocks (RMB) which partially cover moving objects in a sequence. Intuitively, improved coding performance is achieved if instead of using a prescribed codebook of fixed-size regular shaped patterns, all pattern shapes are dynamically extracted from the video content. This pattern formation technique requires a clustering algorithm. In this paper we investigate the impact of clustering approaches on pattern generation. We also investigate the performance of hybrid pattern based coding using both the pre-defined and dynamically extracted patterns in a pattern codebook. The experimental results confirm that clustering algorithm has little impact on overall performance and hybrid pattern based coding does not improve the performance.
Original language | English |
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Title of host publication | IEEE/ACIS International Conference on Computer and Information Science |
Place of Publication | USA |
Publisher | IEEE, Institute of Electrical and Electronics Engineers |
Pages | 320-325 |
Number of pages | 6 |
ISBN (Electronic) | 0769528414 |
DOIs | |
Publication status | Published - 2007 |
Event | 6th International Conference - Melbourne, Australia, Australia Duration: 11 Jul 2007 → 13 Jul 2007 |
Conference
Conference | 6th International Conference |
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Country/Territory | Australia |
Period | 11/07/07 → 13/07/07 |