Motion Vector Re-Estimation Technique for Transcoding into Lower Spatial Resolution

Kang-Seo PARK  Doo-Jin HAN  Tae-Yun CHUNG  Sang-Hui PARK  

IEICE TRANSACTIONS on Information and Systems   Vol.E86-D   No.11   pp.2487-2489
Publication Date: 2003/11/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Image Processing, Image Pattern Recognition
digital video transcoding,  motion estimation,  Taylor series expansion,  H.263,  

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A novel motion vector re-estimation technique for transcoding into lower spatial resolution is proposed. This technique is based on the fact that the block matching error is proportional to the complexity of the reference block with Taylor series expansion. It is shown that the motion vectors re-estimated by the proposed method are closer to optimal ones and offer better quality than those of previous techniques.