Error Resilience Enhancement of H.264/AVC Video for Wireless Transmission Using Flexible Macroblock Ordering
碩士 === 國立清華大學 === 資訊工程學系 === 95 === H.264/AVC video coding standard is very suitable for wireless application because of its excellent compression efficiency, network-friendly design and error resilient tools. However, video stream suffers packet losses in error-prone wireless environment, results i...
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| Format: | Others |
| Language: | en_US |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/32383514780380263128 |
| Summary: | 碩士 === 國立清華大學 === 資訊工程學系 === 95 === H.264/AVC video coding standard is very suitable for wireless application because of its excellent compression efficiency, network-friendly design and error resilient tools. However, video stream suffers packet losses in error-prone wireless environment, results in quality degradation to video sequences. It will be essential to solve this problem. In this paper, we use explicit type of FMO (Flexible Macroblock Ordering) in H.264/AVC error resilient tool to provide error resilient video transmission. Our method introduces the error sensitivity of MB (macroblock) to create a MBAmap (Macroblock Allocation map) to tell encoder the MB encoding order and contains two properties. 1) scatter more error sensitive MBs to different slice group to prevent losing them together. 2) when video sequences suffer packet losses, the lost MBs have more correctly received macroblocks to enhance the performance of error concealment. Simulation results show that our method outperforms the default FMO disperse type of H.264/AVC codec.
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