The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 1992
Filed:
Sep. 18, 1991
Stephen M Keating, Lower Earley, GB;
Sally J Griffiths, Hook, GB;
Sony Broadcast & Communications Limited, Basingstoke, GB;
Abstract
A motion compensated video standards converter comprises a block matcher (3) for deriving a plurality of motion vectors for each pixel of each field or frame of an output standards-converted video signal, the motion vectors representing motion between successive fields or frames of an input video signal from which the output video signal is to be derived by motion compensated interpolation, a circuit (25) for testing each said motion vector by deriving the sum of absolute luminance differences of corresponding pixels in blocks of pixels in the two fields or frames of said input video signal temporarily nearest a field or frame of said output video signal, which blocks are pointed to by the motion vector under test, a circuit (26 to 28) for center-weighting said sum of absolute luminance differences if the magnitude of said motion vector under test is less than a predetermined value, and a selector (29) for selecting from said plurality of motion vectors, the motion vector which results in the minimum said sum of absolute luminance differences.