Abstract: In order to further improve video quality of adaptive sub\|pixel interpolation algorithm and reduce computational complexity, we proposed an adaptive interpolation filter algorithm based on HEVC (high efficiency video coding). Firstly, the algorithm was coded under the video coding framework of new coding standard H.265/HEVC to improve efficiency of video coding. Secondly, the filter coefficients demanded by code stream and the complexity of decoding computation were reduced by the symmetric optimization of filter coefficients. The results of complexity analysis show that compared with other algorithms, the multiplicative complexity of  this algorithm is reduced by 229%, and the addition complexity is reduced by 245%. Simulation results show that, compared with other algorithms, this algorithm has good coding performance and robustness for different resolution video sequences.

Key words: adaptive filter, multisymmetry, communication technology, bit rate, peak signal to noise ratio