An improved motion estimation criterion for temporal coding of video. (26th May 2022)

• Record Type: Journal Article
• Authors: Mishra, Awanish Kumar; Kohli, Narendra
• Is Part Of: International journal of computational science and engineering. Volume 25:Number 3(2022)
• Page Start: 308
• Page End: 314
• Publication Date: 2022-05-26
• Subjects: motion estimation -- matching criterion -- block matching -- search window -- source block; Computer science -- Mathematics -- Periodicals; Computer simulation -- Mathematical aspects -- Periodicals; Computational intelligence -- Periodicals; 004.015105
• Languages: English
• ISSNs: 1742-7185

Abstract

The size of video data is growing exponentially worldwide and hence there is a need for better video coding standards. MPEG and H.26X have provided several standards for video coding. The latest and effective video coding standards are AVC, HEVC, and AV1. MPEG and H.26X, which employ block matching approaches for temporal coding and the mean absolute difference (MAD) is commonly used as the block matching parameter. MAD is very simple and there is very little complexity in its implementation, but sometimes MAD results in spurious selection of matched block due to different transformations in sequential images and the noise introduced in the frame. To overcome this problem there have been many different matching criteria like vector matching criterion (VMC), smooth constrained mean absolute error (SCMAE) based on DCT, and scaled value criterion (SVC) based on modified pixel values. Criteria described thus far do not take into account the noise generated in the frame, resulting in inaccurate block selection or rejection. A novel motion estimating criterion is proposed in this study and compared to the previous four criteria in terms of PSNR, the average number of assessed search points for every block, and mean MAD for every picture. The suggested matching criterion improves assessed number of search points by about 33.92%, PSNR value by about 9% and average of MAD per pixel by about 70%.