Due to the progress of Internet technology and technical improvement, the growths of multimedia products and services ,such as Multimedia Message Service¡]MMS¡^, Multimedia on Demand¡]MoD¡^, Video Conferencing, and Digital TV, are very fast. All of these services need good video compression and audio compression standards to support. It is impossible to transmit source data of multimedia on networks. Motion Estimation needs the most computing complexity in the video compression. In our research, we focus on how to reduce candidate blocks and keep video quality.
We study some fast motion estimation algorithms and architectures, and design a fast motion estimation architecture which supports resolution of 1280x720 at 30fps frame rate in HDTV specification based on hierarchical motion estimation algorithm. In the limit of hardware resources and the compressed video quality, the architecture can improve inter-coding performance. Two adjacent MacroBlocks have similar Motion Vector in our observation. We arrange a 16x8 processing element array to deal with two adjacent MacroBlocks together. The design can reduce a lot of clock cycles in the hierarchical motion estimation architecture, and keep high video quality.
Furthermore, we propose a search range prediction method¡]called ASR¡^which reflect the motion behavior of video sequences into search range on MB-By-MB Basis. ASR can reduce the unnecessary operation of candidate blocks and keep very high video quality compared with Full Search Block Matching algorithm by the implementation in official software of the new video compression standard, Joint Model of H.264/AVC.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0817104-144738 |
| Date | 17 August 2004 |
| Creators | Chu, Kung-Hsien |
| Contributors | Wen-Shyong Hsieh, Tsung-Chuan Huang, Lih-Shyang Chen, Mon-Yen Lwo, Chu-Sing Yang |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0817104-144738 |
| Rights | unrestricted, Copyright information available at source archive |
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