Performance analysis of Dirac video codec in different motion vector accuracies and wavelet lifting decompositions
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KünyeÖzenli, D., & Pazarcı, M. (2011). Performance analysis of Dirac video codec in different motion vector accuracies and wavelet lifting decompositions. In Jelena Bozek (Ed.), 2011 Proceedings ELMAR, (pp. 63-66). Piscataway, NJ: IEEE.
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.