Marking a video and/or audio signal

Details Marking a video and/or audio signal Marking a video and/or audio signal

1996-12-09

1999-08-17

Harvey, David E.

Television

Format

Including additional information

386 94, H04N 708

Patent

active

059401346

ABSTRACT:
Method and arrangement for marking a video or audio signal to assign a classification to said signal, for example, to identify that the signal is authentic and may not be copied. The signal comprises at least two components (Y, UV) according to a predetermined standard (MPEG, PAL, NTSC). According to the invention, values are assigned to said components which in combination can normally not occur. For example, in black picture portions where Y, U and V are all zero, U and/or V are now wilfully made non-zero to constitute the watermark. Television receivers still display said black portion. The watermark is not lost when the signal is re-encoded and copied on a recordable disc. A player will not reproduce the copy because the watermark no longer corresponds with the "wobble key" of the new disc.

REFERENCES:
patent: 4218697 (1980-08-01), Leventer
patent: 5517252 (1996-05-01), Plantholt
patent: 5627655 (1997-05-01), Okamoto
patent: 5668603 (1997-09-01), Copeland

Affiliated with

Also associated with

Rating

Marking a video and/or audio signal does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Marking a video and/or audio signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Marking a video and/or audio signal will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-319845