ADAPTIVE INTERPOLATION FILTER FOR H.264/AVC Bhavana Prabhakar Student Id: Department of Electrical Engineering
H.264/ADVANCED VIDEO CODING: Encoder block diagram H.264 [18]
H.264/ADVANCED VIDEO CODING: Decoder block diagram H.264 [18]
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]
An individual filter is to be used for the interpolation of each fractional-pel position The estimation of the coefficients and the motion compensation are performed in the steps given in [16] Filter coefficients are to be coded Filter coefficients are subject to quantization, followed by prediction and entropy coding The aliasing effects are minimized by suppressing the high- frequency components Steps to reduce blurring effects. STEPS TAKEN FOR IMPLEMENTATION OF AN AIF
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:
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
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