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1 September 2008 Region-of-interest-based video transcoding from MPEG-2 to H.264 in the compressed domain
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A new MPEG-2-to-H.264 video transcoding algorithm based on regions of interest (ROIs) is proposed. The whole transcoding scheme, including the ROI detection, is applied in the compressed domain to alleviate the computational load. The ROI detection uses the motion information from the partially decoded MPEG-2 bitstream. Then the ROIs that are likely to attract the viewer's attention are transcoded with drift compensation to provide better quality, while other regions are transcoded without drift compensation to save computational complexity. Experimental results show that our algorithm provides a better trade-off between computational complexity and picture quality. It achieves a speedup of 2 times over the closed-loop transcoding algorithm in the compressed domain, while giving comparable visual quality.
©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)
Rong Xie and Songyu Yu "Region-of-interest-based video transcoding from MPEG-2 to H.264 in the compressed domain," Optical Engineering 47(9), 097001 (1 September 2008).
Published: 1 September 2008


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