Motion video signal processing for recording or reproducing – Local trick play processing – With randomly accessible medium
Reexamination Certificate
2007-11-20
2007-11-20
Tran, Thai Q. (Department: 2621)
Motion video signal processing for recording or reproducing
Local trick play processing
With randomly accessible medium
C725S032000
Reexamination Certificate
active
10436008
ABSTRACT:
A method and apparatus is disclosed which reduces or removes the effectiveness of commercial skip systems such as presently found in VCRs, PVRs, etc. which are designed to delete commercials from signal material upon playback of a previously recorded version of the signal material. In an embodiment, the effectiveness of the commercial skip system is reduced or removed by adding a flat field of selected signal level to active line portions of video lines of the signal material. Other embodiments modify the normal fade to black signal indicative of a commercial to provide a fade to non-black signal. In further embodiments, a fade to non-black signal is inserted in an overscan area of the signal picture. Still further embodiments modify audio signals or selected signals in the horizontal blanking interval which may be used in commercial skip systems to detect the presence of commercials. Still other embodiments provide techniques for overcoming the commercial skip system altering effects of the previously mentioned embodiments to at least partially restore the commercial skip system, or to enhance the reliability or effectiveness of an existing commercial skip system which has not been altered.
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PCT Search Report for PCT/US2004/011409 dated May 12, 2005, 3 pages.
Quan Ronald
Ryan John O
Wonfor Peter
Almeida George B.
Dunn Mishawn
Macrovision Corporation
Tran Thai Q.
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