07693297 is referenced by 41 patents and cites 2 patents.

Method determining lookup table (“LUT”) for embedding watermark. For each quantization cell, calculating probabilities that signal point falls into cell. Selecting cell by probabilities. Setting LUT value to watermark value with largest probability, subject to run constraint. For remaining cells, repeating selecting and setting steps. Other method determining quantization ensemble by calculating probability density function for signal points where the watermark value to be embedded. Distortion and robustness functions are formulated. Given robustness or distortion is selected. Functions optimized, and ensemble of quantizers determined with parameters that comply. Other method quantizing in association with lossy compression. Strength of compression determined. Adapting strength of watermark with strength of compression by a mapping. Other method selecting points for embedding watermark. Determine threshold between large and small signal points using statistical method. Select signal points for embedding according to threshold. Also, processors, computer programs, and systems.

Title
Watermark embedding and detecting methods, systems, devices and components
Application Number
11/196526
Publication Number
7693297 (B2)
Application Date
August 4, 2005
Publication Date
April 6, 2010
Inventor
Kan Li
Toronto, ON, M4X 1N3
CA
Xiao Ping Zhang
Mississauga, ON, L5M 6X6
CA
Agent
Dowell & Dowell PC
IPC
G06K 9/36
G06K 9/00
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