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:
Jun. 14, 2005
Filed:
Jan. 13, 1999
Steven D. Maurer, Aloha, OR (US);
Steven D. Maurer, Aloha, OR (US);
Tektronix, Inc., Beaverton, OR (US);
Abstract
A method of detecting content based defects in previously compressed video streams decodes a video channel from the compressed video streams and performs a match on a frame/field basis between each frame/field of the video channel and a black frame/field and/or a previous frame/field to detect missing frames/fields and/or duplicate frames/fields. The number of consecutive missing and/or duplicate frames/fields are counted and an alarm signal is generated when the count exceeds a specified value. A beat pattern detector may be used to differentiate between 3/2 pulldown and other duplicate frame/field content errors, and a graphics detector may be used to differentiate between lettering/graphics stills and other duplicate frame/field content errors.