Industrial Technology Research Institute

Sunplus Technology Co., Ltd.

Yeping Su

Ming-Ting Sun

Yuh-Feng Hsu

Shin-Huang Chang

Ming-Tin Sun

A method for fast multiple reference frame motion estimation, which is used to perform motion estimation between a current frame and reference frames Fn&#x2212;1, Fn&#x2212;2, . . . , Fn&#x2212;k. The method performs a special block matching to find a plurality of motion vectors for blocks of each frame with respective to a previous frame and then composes motion vector(s) of the current frame referring to the reference frame Fn&#x2212;(k&#x2212;1) and a motion vector of the reference frame Fn&#x2212;(k&#x2212;1) referring to the reference frame Fn&#x2212;k into composed motion vectors of the current frame referring to the reference frame Fn&#x2212;k for the block in the current frame. The method selects a composed motion vector with a minimum of cost function from the composed motion vectors produced when composing the motion vectors and then finely adjusts the composed motion vector selected, thereby obtaining an adjusted motion vector.

Method for fast multiple reference frame motion estimation

A fast non-iterative Global Motion Estimation (GME) algorithm is disclosed for estimating the perspective transform global motion parameters from the Motion Vectors (MV) obtained from the block matching process that includes grouping a plurality of motion vectors in the input video stream into a predetermined number of groups of motion vectors, calculating a set of global motion parameters from each of the predetermined groups of the motion vector, and processing the set of global motion parameters generated from the calculation to obtain a final estimation.

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Seattle, WA, United States of America

Yeping Su