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exp2_motion - EE4414 Multimedia Communication Systems II...

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EE4414 Multimedia Communication Systems II Experiment Two Motion Estimation for Video Coding Yao Wang and Xiaofeng Xu 1. Introduction As you have learnt in the lecture, motion compensated prediction is an important step in modern video coding techniques. For this experiment, you are provided with MATLAB programs for performing motion estimation and motion compensation using different techniques: EBMA (with integer or half-pel accuracy) and HBMA. You should go through the MATLAB codes and try to understand how each algorithm is implemented. You are also asked to run these programs with different parameter settings and record the resulting prediction results and computation time. From these experiments, you should appreciate the trade-off between prediction accuracy and computation time with different algorithms and parameter settings. Another program applies block DCT on an image, quantizes the DCT coefficients, and counts the number of non-zero coefficients after quantization. The number of non-zero coefficients is a good indicator of the required bit rate to code a frame. By applying this program to both an original video frame and the prediction error, and comparing the resulting numbers of non-zero coefficients, you can also appreciate the bit-rate savings by motion estimation.
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