Complexity Reduction Using a Variable Block Size Motion Descriptor for a Scalable Video-On-Demand Server
碩士 === 國立交通大學 === 電子工程系 === 91 === The Video-On-Demand (VOD) service has grown rapidly in recently years, and two of the core technologies in VOD service are video indexing and streaming over heterogeneous networks and terminal devices. For accurate indexing and high-performance streaming...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/02099435337137489097 |
| Summary: | 碩士 === 國立交通大學 === 電子工程系 === 91 === The Video-On-Demand (VOD) service has grown rapidly in recently years, and two of the core technologies in VOD service are video indexing and streaming over heterogeneous networks and terminal devices. For accurate indexing and high-performance streaming, a Variable Block-Size Motion Descriptor (VBS-MD) and a low-complexity encoder are proposed for a streaming server. The VBS-MD provides motion vector descriptors for a reduced complexity encoder that has no motion estimation module to encode bitstream for various bitrates at spatio-temporal resolutions. The VBS-MD is further used as Motion Activity Descriptor specified in MPEG-7 for motion-based video indexing. The VBS-MD is organized and compressed to provide efficient accessing and storage in the server. The simulation results show that the proposed encoder has similar performance but much lower complexity as comparing with Advance Video Coding recommended by the MPEG committee. The VBS-MD also provides accurate video indexing. The proposed architecture can be utilized to build an efficient scalable VOD services for multimedia delivery in a network environment.
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