US 6,983,057 B1
Methods for embedding image, audio and video watermarks in digital data
Anthony Tung Shuen Ho, Singapore (Singapore); and Siu Chung Tam, Singapore (Singapore)
Assigned to Datamark Technologies PTE Ltd., Singapore (Singapore)
Appl. No. 9/701,809
PCT Filed Jun. 01, 1998, PCT No. PCT/SG98/00039
§ 371(c)(1), (2), (4) Date Feb. 22, 2001,
PCT Pub. No. WO99/63443, PCT Pub. Date Dec. 09, 1999.
Int. Cl. G06K 9/00 (2006.01)
U.S. Cl. 382—100 52 Claims
OG exemplary drawing
 
1. A method for applying digital watermarking image data or digital watermarking audio data to an unlabeled digital image, audio, or video data sample, said method including the steps of:
a) inputting a set of unlabeled digital data and a set of digital watermark data;
b) formatting the unlabeled digital data into a format suitable for orthogonal transformation;
c) performing an orthogonal transformation on the formatted unlabeled data to produce a set of unlabeled data transform coefficients;
d) formatting the digital watermark data into a format suitable for orthogonal transformation;
e) performing an orthogonal transformation on the formatted watermark data to produce a set of watermark data transform coefficients;
f) for each watermark data transform coefficient, allocating an unlabeled data transform coefficient to be replaced and replacing the respective unlabeled data transform coefficients to produce a labeled set of data transform coefficients;
g) storing the locations into which watermark data transform coefficients were encoded in the set of labeled data transform coefficients to generate a unique key for future decoding of the watermark data;
h) performing an inverse orthogonal transformation on the labeled data transform coefficients to convert them into a set of labeled digital data having a form resembling the original unlabeled digital data.