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:
Mar. 16, 2010
Filed:
Jan. 20, 2004
Applicants:
Sjoerd Zwart, Eindhoven, NL;
Pieter-jelle Gerbrandts, Eindhoven, NL;
Tom Kan, Eindhoven, NL;
Inventors:
Assignee:
IPG Electronics 503 Limited, St. Peter Port, Guernsey, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An encrypted stream of video information () contains first video frames () and second video frames which are accessible and not accessible during trick play respectively. From a source stream encrypted that is for decryption with repeatedly changing control words sections of the stream are identified where respective first ones of the frames occur in the stream. Control words for decryption () are included in the stream. At least part of the control words are included in the stream at positions selected synchronized to the identified sections.