InterDigital Inc (IDCC)

[revlis]

old patents United States Patent 7,272,240
Goldberg , et al. September 18, 2007

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Method and apparatus for generating, sensing, and adjusting watermarks


Abstract
A method and apparatus for generating and adjusting a watermark in a watermarking system comprising a watermark generator and a watermark detector includes the watermark generator emitting the watermark. The watermark detector detects the watermark. The watermark detector transmits a signal to the watermark generator. The watermark generator then adjusts the generated watermark based on the signal received from the watermark detector.


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Inventors: Goldberg; Steven Jeffrey (Downingtown, PA), Purkayastha; Debashish (Pottstown, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 11/286,005
Filed: November 23, 2005

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Current U.S. Class: 382/100
Current International Class: G06K 9/00 (20060101)
Field of Search: 382/100