Local adaptive filter in predictive coding

Yu Li; Yun He

doi:10.1117/12.633515

24 June 2005 Local adaptive filter in predictive coding

Yu Li, Yun He

Proceedings Volume 5960, Visual Communications and Image Processing 2005; 59606L (2005) https://doi.org/10.1117/12.633515
Event: Visual Communications and Image Processing 2005, 2005, Beijing, China

Abstract

Standard hybrid video coding systems are based on motion compensated prediction with fractional pel displacement vector resolution. In H.264/AVC, a fixed 6-tap interpolation filter is used to generate the half-pel resolution referenced blocks. Considering the non-stationary statistical properties of picture sequences, some adaptive interpolations are introduced in published papers. A practical scheme is proposed to use a three-parameter 1D filter for a whole frame subject to the statistical properties of the source pictures. The problem for such approach is that a universal filter for the whole picture can not adapt to the local changes, it is not considered as the optimal solution to the prediction. In this paper, a local adaptive filter is proposed to adapt to the local statistics of the picture structure. 2D Wiener-Hopf filter of different sizes are simulated to show the possibility of decreasing the prediction error. A better performance to the prediction error as well as the total coding performance compared to the 1D adaptive filtering can be achieved.

Citation Download Citation

Yu Li and Yun He "Local adaptive filter in predictive coding", Proc. SPIE 5960, Visual Communications and Image Processing 2005, 59606L (24 June 2005); https://doi.org/10.1117/12.633515

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