Scaling independent technique for watermarking images with recorder shut-off
AssigneeRovi Solutions Corporation
InventorJohn O. RYAN
Life of this patent
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AssigneeRovi Solutions Corporation
InventorJohn O. RYAN
Estimating the term…
A robust technique to prevent illicit copying of video information notwithstanding the use of image scaling. A watermark is embedded into the video signal (e.g., DVD's content or other video sources) at different scales (i.e., sizes). The watermark is maintained at each scale for a predetermined time duration that is sufficient to allow the detector circuit in a DVD-recorder, DVHS recorder, DVCR, or any other digital format recorder to detect, extract, and process information contained in the watermark. At the end of the predetermined time duration, the watermark is changed to a different scale preferably on a pseudo-random basis to ensure that each one of all the scales in a predetermined scaling range is achieved a predetermined number of times. Thereby the recorder shuts off a number of times during play of the content, each time the detector circuit senses the watermark.
A method to prevent illicit copying of video information comprising:
A record carrier storing a content, the record carrier having a watermark at different scales embedded into the content according to a pattern such that the watermark having a first scale selected from a range of scales is embedded in the content of the record carrier for a first time period, during or at the end of the first time period, a watermark having another scale selected from the range of scales is embedded in the content of the record carrier for a second time period, subsequent watermarks having different scales are embedded in the content until each of the scales is used for a predetermined number of times;
A signal carrying video information embodied in a propagation medium, the video information signal having a watermark at different scales embedded into the video information according to a pattern such that the watermark having a first scale selected from a range of scales is embedded in the video information for a first time period, during or at the end of the first time period, a watermark having another scale selected from the range of scales is embedded in the video information for a second time period, subsequent watermarks having different scales are similarly embedded in the video information until each of the scales is used for a predetermined number of times;
A method to provide watermarked video, comprising:
A record carrier storing video content and further comprising:
A method of embedding a plurality of watermarks in a video signal, comprising:
Dependencies are inferred from the claim text.