Performance Analysis of Dirac Video Codec in Different Motion Vector Accuracies and Wavelet Lifting Decompositions


Ozenli D., Pazarci M.

53rd International ELMAR Symposium (ELMAR), Zadar, Croatia, 14 - 16 September 2011, pp.63-66 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Zadar
  • Country: Croatia
  • Page Numbers: pp.63-66

Abstract

Dirac is presented by BBC to compress video streams efficiently and eliminate software payments for license fees. Dirac video codec structure allows new wavelet tools to be specified by a user in order to improve its performance. In this paper, Dirac performance is analyzed for different motion vector accuracies and with different wavelet tools. Meanwhile, a new decomposition filter scheme is proposed for Dirac to compensate computational complexity that arises due to subpixel precision analyses and filter structures of this codec. Investigated codec has a stable structure therefore correct interpretations are possible for different test sequences using the comparison tables in this paper.