×

Controlling operation of a device using a re-configurable watermark detector

  • US 6,442,285 B2
  • Filed: 12/08/2000
  • Issued: 08/27/2002
  • Est. Priority Date: 05/19/1999
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for controlling operation of a device using a watermark comprising:

  • decoding a watermark embedded in a signal of a media type, where the watermark includes a command signal used to trigger a change in operation of the watermark detector;

    based on the command signal, changing operation of the watermark detector, including changing how the watermark detector decodes or interprets a watermark in a signal of the media type;

    after changing operation of the watermark detector, decoding a usage control restriction from a watermark embedded in the signal, wherein the watermark is perceptibly adapted to the signal such that the watermark is hidden in human perceptible portions of the signal and the usage control restriction controls transfer or copying of the signal in which the watermark is embedded.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×