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:
Oct. 09, 2007
Filed:
Jul. 05, 2002
Sergiy Bilobrov, Coquitlam, CA;
Albert Chau, Burnaby, CA;
Ronald H. Gerhards, Vancouver, CA;
Jason Lesperance, Vancouver, CA;
Hongfei MA, Vancouver, CA;
David Jacques Vaisey, Belcarra, CA;
Richard J. Beaton, Burnaby, CA;
Sergiy Bilobrov, Coquitlam, CA;
Albert Chau, Burnaby, CA;
Ronald H. Gerhards, Vancouver, CA;
Jason Lesperance, Vancouver, CA;
Hongfei Ma, Vancouver, CA;
David Jacques Vaisey, Belcarra, CA;
Richard J. Beaton, Burnaby, CA;
QDesign U.S.A., Inc., Seattle, WA (US);
Abstract
In order to discourage compression of video and other visual image signal data that accompanies unauthorized reproduction, distribution and storage of such data, the signal data is modified in a manner to be essentially imperceptible but which, when compressed and then decompressed, causes the signal quality to be unacceptable. In one approach, the visual signal is modified directly. In another approach, the signal is first transformed into the same domain where a compression-decompression algorithm encodes and decodes the data, and then the transformed signal is modified so that the quality of the visual signal when decompressed and displayed is unacceptably degraded.