Performance analysis of Dirac video codec in different motion vector accuracies and wavelet lifting decompositions

Özenli, Deniz (Dogus Author) -- 2011 proceedings / ELMAR: Zadar, Croatia, 14 - 16 September 2011Dirac 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.Tankerska plovidba, Transmitters and Communications (OiV), Croatian Radio and Television (HRT