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A Study using Variable Blocks of Boundary Matching Method for H.264 to MPEG-2 Video Transcoding  

Son, Nam-Rye (목포대학교 중점연구소)
Jung, Min-A (목포대학교 컴퓨터공학과)
Lee, Sung-Ro (목포대학교 정보전자공학)
Lee, Guee-Sang (전남대학교 컴퓨터정보학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.11C, 2009 , pp. 1049-1058 More about this Journal
Abstract
After the efficiency of H.264 video compression has been announced, it replaced MPEG-2 standard in several applications. So transcoding methods of MPEG-2 to H.264 have been studying because there are variety devices and contents followed by MPEG-2. Although H.264 supported various service such as IPTV, DMB, digital broadcasting etc, but users using MPEG-2 devices cannot accessible to them. This paper propose H.264 to MPEG-2 transcoding for users of MPEG-2 devices without displacement H.264. The proposed method predicted a motion vector for MPEG-2 encoder after it extracted from motion vectors of variable blocks in H.264 to improve processing time. Also it predicted a optimal motion vector using modified boundary matching algorithm after grasped a special character for boundary and background of object. The experimental results from proposed method show a considerable reduction in processing time, as much as 65% averagely, with a small objective quality reduction in PSNR.
Keywords
H.264/AVC; MPEG-2; Transcoding; Motion Estimation; Motion Vector; BMA(Boundary Matching Algorithm);
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