Transcription of Motion Estimation for Video Coding - Stanford University
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Motion Estimation for Video Coding - Stanford University
Motion Estimation for Video Coding Motion -Compensated Prediction Bit Allocation Motion Models Motion Estimation Efficiency of Motion Compensation Techniques T. Wiegand / B. Girod: EE398A Image and Video Compression Motion Estimation no. 1. Hybrid Video Encoder Coder Control Control Data s[ x, y, t ] u[ x, y, t ] Intra-Frame DCT. DCT Coder - Coefficients Decoder Intra-Frame Decoder u '[ x, y, t ]. s ' [ x, y , t ]. 0. Motion - Compensated Intra/Inter Predictor s [ x, y, t ] Motion Data Motion Estimator T. Wiegand / B. Girod: EE398A Image and Video Compression Motion Estimation no. 2. Motion -Compensated Prediction Previous Stationary frame background Moving t object Current frame x y time t dx . Displaced d object y . Prediction for the luminance signal s[x,y,t] within the moving object: s [ x, y, t ] s ( x d x , y d y , t t ).
Impact of the Affine Parameters-150-100-50 0 50 100 150-150 -100 -50 0 50 100 150 x y-150-100-50 0 50 100 150-150 -100 -50 0 50 100 150 x-150-100-50 0 50 100 150-150 -100 -50 0 50 100 150 x y ... EE398A Image and Video Compression Motion estimation no. 12 Differential Motion Estimation Assume small displacements d x,d y: Aperture problem ...
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