Study of the Fast Motion Estimation of Multiple ReferenceFrames in H.264
碩士 === 崑山科技大學 === 電機工程研究所 === 98 === Compared to previous video coding standards, H.264/AVC has better coding efficiency with numerous powerful techniques such as Multi-Reference Frames, Variable Block Size, and Quarter Pixel Resolution. It can save about 50% bit rate under the same image quality. B...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2010
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| Online Access: | http://ndltd.ncl.edu.tw/handle/28188552954824868260 |
| Summary: | 碩士 === 崑山科技大學 === 電機工程研究所 === 98 === Compared to previous video coding standards, H.264/AVC has better coding efficiency with numerous powerful techniques such as Multi-Reference Frames, Variable Block Size, and Quarter Pixel Resolution. It can save about 50% bit rate under the same image quality. But these structures also give rise to a heavy loading of the H.264 encoder to be applied in real-time applications. Therefore, we proposed a fast algorithm of multiple reference pictures for motion compensation. It takes advantage of the characteristic “successive frames have high relationship” and save numerous calculation time of motion estimation. Our algorithm refers to motion vector prediction and estimation a result. It is used to substitute for the calculation result of motion estimation and save numerous time motion estimation taking and change the block matching method , while maintaining picture quality in a certain distortion within acceptable. The experiment result shows that our algorithm can save approximate about 80% coding time and doesn’t affect quality.
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