Interlaced video signal motion compensation prediction system
AssigneeKokusai Denshin Denwa Kabushiki Kaisha
InventorYasuyuki Nakajima
Life of this patent
Estimating the term…
Abstract
A coder with a motion estimation system, which comprises a same parity field motion estimator, a near field motion estimator, an inter-field interpolated motion estimator, a comparator for selecting the smallest one of prediction errors E1 to E3 output from the respective motion estimators, and a selector for selectively outputting a motion vector from the motion estimator providing the smallest prediction error.
Claims19
An interlaced video signal motion compensation prediction system for block-by-block motion compensation by using an input and a reference picture comprising:
- means for storing the input and the reference pictures for each field block;
- same parity field motion estimation means for performing motion estimation for each said field block between same parity field blocks of said input and reference pictures by using the same vectors for each input field block, thus obtaining motion vectors and obtaining the sum of field prediction errors from said motion estimation;
- near field motion estimation means for performing motion estimation for each said field block with respect to the temporally nearest field block of said reference picture to said input picture by using the same vectors for each field, thus obtaining motion vectors and obtaining the sum of field prediction errors from said near field motion estimation;
- inter-field interpolated motion estimation means for performing motion estimation for each said field block between a picture obtained by combining two field pictures of said reference picture and input picture by using the same vectors for each field, thus obtaining motion vectors and obtaining the sum of field prediction errors from said inter-field interpolated motion estimation;
- and
- means for comparing the prediction errors output from each of said motion estimation means and selecting a selection flag indicative of the smallest prediction error and the motion vectors from said motion estimation means providing said smallest prediction error;
- and
- means for transmitting a selection flag indicative of the selected motion estimation means and the motion vectors corresponding to said selection flag.
An interlaced video signal motion compensation prediction system for performing block-by-block motion vector prediction by using input and reference pictures and also motion compensation with error of said prediction comprising:
- a plurality of motion estimation means for performing motion estimation of each block with respect to one or more of said reference pictures by providing motion vectors;
- processing means for adding predetermined constants to a prediction error signal obtained from each said motion estimation means according to the number of motion vectors;
- means for comparing each prediction error output from said processing means and selecting a selection flag indicative of the smallest prediction error and a motion vector from the motion estimation means providing said smallest prediction error;
- and
- means for transmitting said selection flag and a motion vector corresponding to said selection flag.
Dependencies are inferred from the claim text.