Motion estimation method and apparatus for calculating a motion

Details Motion estimation method and apparatus for calculating a motion Motion estimation method and apparatus for calculating a motion

1995-12-28

1997-04-08

Chin, Tommy P.

Television

Bandwidth reduction system

Data rate reduction

348402, 348699, H04N 736

Patent

active

056192681

ABSTRACT:
A motion estimation method and a motion estimation apparatus for calculating a motion vector to estimate a current picture partially forming a video sequence on the basis of first and second reference pictures partially forming the video sequence. In the method and apparatus, a reference block included in the first reference picture similar to a current block included in the current picture is specified and multiplied by a first coefficient. By performing a subtraction between the multiplied reference block and the current block, a template block indicative of a difference between the multiplied reference block and the current block is obtained. On the other hand, candidate blocks are calculated by multiplying, by a second coefficient, each reference blocks included in a search window partly forming the second reference picture. Based on the candidate blocks and template block are calculated distortion values each indicative of a difference between the following interpolated blocks and current block. Each of the interpolated blocks is indicative of a mean between the specified reference block of the first reference picture and each reference blocks of the search window.

REFERENCES:
patent: 5151784 (1992-09-01), Lavagetto et al.
patent: 5400087 (1995-03-01), Uramoto et al.
patent: 5421023 (1995-05-01), Murakami
patent: 5424779 (1995-06-01), Odaka et al.
patent: 5537155 (1996-07-01), O'Connell et al.
patent: 5541661 (1996-07-01), Odaka et al.

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