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MULTIMEDIA PROCESSING

ADAPTIVE INTERPOLATION FILTER FOR H.264/AVC. MULTIMEDIA PROCESSING. Bhavana Prabhakar Student Id: 1000790889 Department of Electrical Engineering. H.264/Advanced Video Coding:. Encoder block diagram H.264 [18 ]. H.264/Advanced Video Coding:. Decoder block d iagram H.264 [18 ].

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MULTIMEDIA PROCESSING

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  1. ADAPTIVE INTERPOLATION FILTER FOR H.264/AVC MULTIMEDIA PROCESSING BhavanaPrabhakar Student Id: 1000790889 Department of Electrical Engineering

  2. H.264/Advanced Video Coding: Encoder block diagram H.264 [18]

  3. H.264/Advanced Video Coding: Decoder block diagram H.264 [18]

  4. Integer samples (shaded blocks with upper-case letters) and fractional sample positions (non-shaded blocks with lower-case letters). Example for filter size 6 x6. [16]

  5. Present the non-separable adaptive interpolation filter which Analytically minimizes the energy of the prediction error (PE).Where is the 2-D filter coefficient for each fractional pel position. PE = Reduces the distorting effects, caused by aliasing, motion blur, motion estimation inaccuracies etc. Further improvements can be achieved, when applying locally adaptive filter, which is adapted to local properties of the image. The Proposal

  6. Steps will be taken to reduce blurring effects by: first considering only displacement without blurring effects. Where = average displacement vector and the prediction signal ( ) expressed in frequency domain is given in eq.(1) (jΩ) = (jΩ) eq.(1) With the intention of compensating the blurring effects, the adaptive interpolation filter H(jΩ) for perfect motion compensated prediction has to satisfy the condition given in eq.(2) (jΩ) = (jΩ) . H(jΩ) eq.(2)

  7. STEPS TAKEN FOR IMPLEMENTATION OF AN AIF

  8. Filter coefficient of a sub-pel position.

  9. Displacement vectors are estimated for every image to be coded. For the purpose of interpolation, the standard interpolation filter of H.264/AVC is applied to every reference image. 2-D filter coefficients are calculated for each sub-pel position independently by minimization of the prediction error energy:

  10. AIF: Adaptive interpolation filter AVC: Advanced video coding BD – ROM: Blue ray disc – read only memory CIF: Common intermediate format HD – DVD: High definition - digital video disc ITU: International telecommunication union KTA: Key technical area MCIF: Motion compensated interpolation filter MPEG: Moving picture experts group VCEG: Video coding experts group List of acronyms

  11. [1] JVT of ISO/IEC & ITU-T, Draft ITU-T Recommendation H.264 and Draft ISO/IEC 14496-10 AVC, Doc JVT-Go50. Pattaya, Thailand, 2003. [2] O. Werner, “Drift analysis and drift reduction for multi resolution hybrid video coding”, Signal processing: image commun., vol. 8, no. 5, pp. 387–409, Jul. 1996. [3] T. Wedi and H. G. Musmann, “Motion and aliasing compensated prediction for hybrid video coding”, IEEE Trans. circuits syst. video technol., vol. 13, no. 7, pp. 577–586, Jul. 2003. [4] T. Wedi, “Adaptive interpolation filter for motion and aliasing compensated prediction”, in Proc VCIP, San Jose, CA, USA, pp. 415–422, Jan. 2002. [5] M. Budagavi, “Video compression using blur compensation”, in Proc.IEEE ICIP, Genova, Italy, pp. 882–885, Sep. 2005. [6] R. E. Crochiere and L. R. Rabiner, “Multi-rate signal processing”, Englewood Cliffs, NJ: Prentice Hall, pp. 88–91, 1983. [7] R. W. Schaefer and A. V. Oppenheim, “Discrete-time signal processing”, Englewood Cliffs, NJ: Prentice-Hall, 1989. [8]  T. Wiegand et al, “Overview of the H.264/AVC video coding standard”, IEEE Trans. circuits syst. video technol., vol. 13, no. 7, pp. 560-576, Jul. 2003. [9] Y. Vatis and J. Ostermann, “Locally adaptive non separable interpolation filter for H.264/AVC”, in Proc. IEEE ICIP, Atlanta, GA, pp. 33–36, Oct. 2006. [10] T.Wedi, “Adaptive interpolation filter for motion compensated prediction”, Proc. IEEE ICIP, Rochester, NY, pp. 509–512, Sep. 2002. References

  12. [11] H.264/AVC reference software version JM11.0 http://iphome.hhi.de/suehring/tml/download/old_jm/jm11.0.zip, Jan. 2007 [Online]. [12] KTA software, version JM11.0 KTA1.3. http://www.tnt.uni-hannover.de/~vatis/kta/jm11.0kta1.3.zip, Mar. 2007 [Online]. [13] Y. Vatis and J. Ostermann, “Prediction of P- and B-frames using a 2-D non-separable adaptive Wiener interpolation filter”,in ITU-T SG16/Q [15] (VCEG) Doc VCEG-AD08, Hangzhou, China, Oct. 2006. [14] Y. Vatis and J. Ostermann, ITU-T SG16/Q [15] (VCEG) VCEG-AE16, Marrakech, Morocco, Jan. 2007. [[15]] S. Wittman and T. Wedi, “Separable adaptive interpolation filter”,in ITU-T SG16/Q6, Doc. C-0219, Geneva, Switzerland, Jul. 2007. [16] Y. Vatis and J. Ostermann “Adaptive interpolation filter for H.264/AVC”, IEEE Trans. circuits syst. video technol., vol. 19, pp.179-192, Feb. 2009. [17] D. Rusanovskyy, K. Ugur, and J. Lainema, “Adaptive interpolation with directional filters”, in ITU-T SG16/Q.6 Doc. VCEG-AG21, Shenzhen,China, Oct. 2007. [18] D. Marpe, T. Wiegand and G. J. Sullivan, “The H.264/MPEG-4 AVC standard and its applications”, IEEE Communications Magazine, vol. 44, pp. 134-143, Aug. 2006. [19] T. Wiegand and G. J. Sullivan, “The picturephone is here:Really”, IEEE Spectrum, vol.48, pp. 50-54, Sep. 2011. [20] I. E. Richardson, “The H.264 Advanced Video Compression Standard”, 2nd Edition, Wiley 2010.

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