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Fast intra- and inter-prediction mode decision of H.264/AVC for medical frame compression based on region of interest

Jafari, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. This paper aims at applying H.264/AVC in medical video compression applications and improving its compression performance with higher perceptual quality and lower coding complexity. We propose a new method that uses lossless compression in the region of interest (ROI) and very high rate lossy compression in other regions. The propose method achieves a fast intra- and interprediction mode decision that is based on encountering coarse MBs for intra- and inter- prediction mode decision of the background region and fine MBs for the ROI region. The MBs of the background region are encoded with the maximum quantization parameter allowed by H.264/AVC in order to maximize the number of null coefficients. Also, in order to further reduce the computational complexity, a two-adaptive search range decision method (proposed previously by the authors) is enhanced using the ROI concept. Experimental results show that the proposed algorithm achieves a higher compression rate on medical videos with a higher quality of ROI with low coding complexity when compared to other standard algorithms reported in the literature and our previous algorithm
  4. Keywords:
  5. Adaptive search range decision ; H.264/AVC ; Intra- and inter-prediction ; Medical video compression ; Region of interest
  6. Source: Australian Journal of Basic and Applied Sciences ; Volume 5, Issue 5 , 2011 , Pages 397-411 ; 19918178 (ISSN)
  7. URL: ajbasweb.com/old/ajbas/2011/397-411.pdf