Abstract
To reduce the loads of a video content distribution system (VCDS), a video distribution method using caching is used. In particular, in order to improve the efficiency of VCDS, video content management (VCM) methods, which use the priority of the number of access and the usage times, etc., had been studied. Moreover, since the data amount of independent video quality is large in VCDS for providing multi-quality, VCM methods using hierarchical data had been studied. However, There are some problems in such cases where the numbers of access are changed for elapsed time, and/or popular contents are frequently registered to be used. Thus, the author focuses on the environment of updating popular contents, and proposes a VCM method based on the numbers of access under the hierarchical quality-transition rule. In the proposed method, the quality of the registered content as new cached contents is assumed to be limited to the low quality, and the controlled capacity is used as cache capacity for new popular contents to improve the cache efficiency. By the experiments under the practical model of distributed contents, the variation models of the number of access and the variation models of the quality, the author verifies that the efficiency of the proposed method are maximum 6.67 percent greater than that of the conventional scheme in the access hit ratios for cached contents.
