Method for determining motion compensation

Abstract

A method for predicting motion compensation for determining of an input image based on a motion vector of the input image from this input image to a reference image which has been sampled at a first set time, and the method includes calculating a motion vector of the input image based on a move, at a second set time, of a block unit which is a part of the input image and consists of a plurality of pixels, and calculating a motion vector of the reference image based on a move, at the first set time, of a block unit which is a part of the reference image and consists of a plurality of pixels. Move compensation of the input image is calculated both from the motion vector of the input image and from the motion vector of the reference image, to thereby realize a method for determining motion compensation with high precision.

1. A method of determining motion compensation for an input image from motion vectors between the input image and a plurality of reference images, said method comprising the steps of:
 (a) calculating a motion vector MV 1  between the input image and one reference image of said plurality of reference images from a motion of at least one block unit at a second set time interval T 2  between the input image and said one reference image, said at least one block unit being a part of said input image and comprising a plurality of pixels;    (b) providing a motion vector MV 2  between at least two reference images of the plurality of reference images at a first set time interval T 1 , which is parallel to the motion vector MV 1  at the second set time interval T 2  and different in magnitude from the motion vector MV 1  at the second set time interval T 2  by a value determined by MV 1 ·T 1 /T 2 ; and    (c) calculating the motion compensation of the input image from both of (i) the motion vector MV 1  between the input image and said one reference image and (ii) the motion vector MV 2  between the at least two reference images of the plurality of reference images.    
     
     
       2. A method of determining motion compensation for an input image from a motion vector between the input image and a plurality of reference images, said method comprising the steps of:
 (a) detecting a motion vector MV 1  between the input image and one reference image R 1  of said plurality of reference images at a second set time interval T 2 ;    (b) providing a motion vector MV 3  between the reference image R 1  and another reference image R 2  of said plurality of reference images at a first set time interval T 1 , said motion vector MV 3  being parallel to the motion vector MV 1  and different in magnitude from the motion vector MV 1  by a value determined by MV 1 ·T 1 /T 2 ;    (c) obtaining a motion vector MV 2  between the input image and the another reference image R 2  at a third set time interval T 3  from a sum of the motion vector MV 1  and the motion vector MV 3 , and calculating respective pixels corresponding to the motion vector MV 1  and the motion vector MV 2  from pixels of the reference image R 1  and the reference image R 2  corresponding to the motion vector MV 1  and the motion vector MV 2  or from pixels positioned peripherally of the pixels of the reference image R 1  and the reference image R 2 ; and    (d) calculating motion-compensated pixel values from the calculated pixels of the reference images.    
     
     
       3. A method of obtaining a motion-compensated image from a motion vector between the motion-compensated image and a plurality of reference images, said method comprising the steps of:
 (a) obtaining a motion vector MV 1  between the motion-compensated image and one reference image R 1  of said plurality of reference images at a second set time interval T 2 ;    (b) providing a motion vector MV 3  between the reference image R 1  and another reference image R 2  of said plurality of reference images at a first set time interval T 1 , which is parallel to the motion vector MV 1  and different in magnitude from the motion vector MV 1  by a value determined by MV 1 ·T 1 /T 2 ;    (c) obtaining a motion vector MV 2  between the motion-compensated image and said another reference image R 2  at a third set time interval T 3  from a sum of the motion vector MV 1  and the motion vector MV 3 , and calculating respective pixels corresponding to the motion vector MV 1  and the motion vector MV 2  from pixels of the reference image R 1  and the reference image R 2  corresponding to the motion vector MV 1  and the motion vector MV 2  or from pixels positioned peripherally of the pixels of the reference image R 1  and the reference image R 2 ; and    (d) calculating motion-compensated pixel values from the calculated pixels of the reference images to obtain the motion-compensated image.    
     
     
       4. A method of obtaining a motion- compensated image, said method comprising the steps of:    ( a )  obtaining a first motion vector MV 1  between the motion - compensated - image and one reference image R 1  of a plurality of reference images at a second set time interval T 2  between the motion - compensated - image and said one reference image R 1 ;      ( b )  calculating a second motion vector MV 2  between the motion - compensated image and another reference image R 2  of said plurality of reference images at a first set time interval T 1  between the motion - compensated image and said another reference image R 2 , said second motion vector MV 2  being parallel to said first motion vector MV 1  and having a magnitude satisfying the relation MV 2 =MV 1 · ( T 1 /T 2   );    ( c )  calculating first pixel values corresponding to said first motion vector MV 1  from pixels of said one reference image R 1  and calculating second pixel values corresponding to said second motion vector MV 2  from pixels of said another reference image R 2 , wherein said reference images R 1  and R 2  are such that a motion vector MV 3  between said reference images R 1  and R 2  has a mathematical relationship with said first and second motion vectors MV 1  and MV 2  in which said motion vector MV 3  is parallel to and different in value from each of said first and second motion vectors MV 1  and MV 2 ; and      ( d )  calculating motion - compensated pixel values of said motion - compensated image from said first pixel values and said second pixel values to obtain said motion - compensated image.     
     
     
       5. A method in accordance with  claim 4 , wherein said reference images R 1  and R 2  are previous to said motion- compensated image in a time sequence.   
     
     
       6. A method of obtaining a motion- compensated image, said method comprising the steps of:    ( a )  obtaining a first motion vector MV 1  between the motion - compensated - image and one reference image R 1  of a plurality of reference images at a second set time interval T 2  between the motion - compensated image and said one reference image R 1 ;      ( b )  calculating a second motion vector MV 2  between the motion - compensated image and another reference image R 2  of said plurality of reference images at a first set time interval T 1  between the motion - compensated image and said another reference image R 2 , said second motion vector MV 2  being parallel to said first motion vector MV 1  and having a magnitude satisfying the relation MV 2 =MV 1 · ( T 1 /T 2   );    ( c )  calculating first pixel values corresponding to said first motion vector MV 1  from pixels of said one reference image R 1  and calculating second pixel values corresponding to said second motion vector MV 2  from pixels of said another reference image R 2 , wherein said reference images R 1  and R 2  are previous to said motion - compensated image in a time sequence; and      ( d )  calculating motion - compensated pixel values of said motion - compensated image from said first pixel values and said second pixel values to obtain said motion - compensated image.