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:
Aug. 25, 1998
Filed:
Feb. 01, 1996
Paul Harquail Meehan, Plainsboro, NJ (US);
Michael Anthony Isnardi, Plainsboro, NJ (US);
Charles Benjamin Dieterich, Kingston, NJ (US);
David Sarnoff Research Center, Inc., Princeton, NJ (US);
Abstract
A method and apparatus for creating and using an encoded bitstream to evaluate a video decoder. The bitstream contains a sequence of pictures or frames such that when a video decoder decodes the bitstream correctly, a desired visible pattern is produced on a video display. Specifically, various display parameters or flags are varied in the bitstream to test the video decoder's ability to implement display features such as '3:2 pulldown'. For example, the bitstream is capable of demonstrating incorrect decoding of the top.sub.-- field.sub.-- first and repeat.sub.-- first.sub.-- field flags by a MPEG compliant video decoder.