Side Information Interpolation with Sub-Pel Motion Compensation for WYNER-ZIV Decoder

Using Distributed Video Coding (DVC), the complex task of exploiting the source statistics can be moved from the encoder to the decoder. Such a DVC decoder needs side information to exploit the statistics. In common DVC codecs, the side information is obtained by interpolating the current frame from already decoded frames. This paper proposes an interpolation technique for the side information that uses motion compensation with sub-pel accuracy, and compares different interpolation filters for calculating the sub-pel values. Using a six tab Wiener filter, we observe a gain of up to 1.8 dB for the DVC coded frames.

[1]  Luciano Alparone,et al.  Adaptively weighted vector-median filters for motion-fields smoothing , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.

[2]  Aaron D. Wyner,et al.  The rate-distortion function for source coding with side information at the decoder , 1976, IEEE Trans. Inf. Theory.

[3]  Catarina Brites,et al.  IMPROVING FRAME INTERPOLATION WITH SPATIAL MOTION SMOOTHING FOR PIXEL DOMAIN DISTRIBUTED VIDEO CODING , 2005 .

[4]  Bernd Girod,et al.  Distributed Video Coding , 2005, Proceedings of the IEEE.

[5]  J. Ostermann,et al.  Coding of coefficients of two-dimensional non-separable adaptive Wiener interpolation filter , 2005, Visual Communications and Image Processing.

[6]  Catarina Brites,et al.  Improving Transform Domain Wyner-Ziv Video Coding Performance , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[7]  R. A. McDonald,et al.  Noiseless Coding of Correlated Information Sources , 1973 .

[8]  Edward J. Delp,et al.  Wyner-Ziv video side estimator: conventional motion search methods revisited , 2005, IEEE International Conference on Image Processing 2005.

[9]  Kannan Ramchandran,et al.  PRISM: A new robust video coding architecture based on distributed compression principles , 2002 .