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. 26, 2008
Filed:
Aug. 30, 1999
Johan P. M. G. Linnartz, Eindhoven, NL;
Johan C. Talstra, Eindhoven, NL;
Antonius A. C. M. Kalker, Eindhoven, NL;
Nicolas Bailleul, Douvres la Delivrande, FR;
Johan P. M. G. Linnartz, Eindhoven, NL;
Johan C. Talstra, Eindhoven, NL;
Antonius A. C. M. Kalker, Eindhoven, NL;
Nicolas Bailleul, Douvres la Delivrande, FR;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An MPEG video stream generator, which contains several slightly different programs, each with approximately the same content. The MPEG stream is constructed in such a manner that a simple transcoder can effectively select one of the programs. This is achieved by storing the differences relative to the default program in selected user data fields. The transcoder is little more than an MPEG bitstream parser, which replaces the bits corresponding to selected set of macroblocks by the replacement data stored in the user data fields. A standard MPEG decoder without any knowledge of the embedded user data fields will simply extracted the default program. One application relates to broadcasting of a television program with or without a logo, or a commercial with or without a public warning. Another application relates to copy-protection schemes. In such a scheme, the default program contains a ticket indicating that the contents may be copied once. Upon recording, this ticket is removed and replaced by the content accommodated in the user data field.