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:
Feb. 23, 2016
Filed:
Sep. 20, 2013
Applicant:
Dcs Copy Protection Limited, Stevenage, GB;
Inventors:
Arie Wijnen, Stevenge, GB;
Baolin Tan, Stevenage, GB;
Assignee:
DCS COPY PROTECTION LIMITED, Steeton, Keighley, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N 9/80 (2006.01); H04N 5/913 (2006.01); G11B 20/00 (2006.01);
U.S. Cl.
CPC ...
G11B 20/00086 (2013.01); H04N 5/913 (2013.01); H04N 2005/91314 (2013.01); H04N 2005/91357 (2013.01); H04N 2005/91371 (2013.01);
Abstract
An apparatus and method for applying anti-copy protection to a raster-scanned video signal are described. A square waveformis added to the vertical synchronization pulsesof the video signal. The effect of the waveform is not apparent until it has been recorded by a video cassette recorder. The anti-copy protected video signal can therefore be viewed normally on a display device at or near to the picture quality intended by the originator of the video signal, but once recorded, exhibits a reduction in picture quality which makes the video signal quite unattractive to view.