US 8,542,831 B2Granted

Multiple transform utilization and application for secure digital watermarking

OwnerScott A. Moskowitzinventor

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Abstract

Multiple transform utilization and applications for secure digital watermarking. In one embodiment of the present invention, digital blocks in digital information to be protected are transformed into the frequency domain using a fast Fourier transform. A plurality of frequencies and associated amplitudes are identified for each of the transformed digital blocks and a subset of the identified amplitudes is selected for each of the digital blocks using a primary mask from a key. Message information is selected from a message using a transformation table generated with a convolution mask. The chosen message information is encoded into each of the transformed digital blocks by altering the selected amplitudes based on the selected message information.

Claims24

Dependent claims

A method for protecting a digital signal, comprising:

obtaining a digital signal comprising a plurality of digital blocks;
transforming, using a processor, each of the digital blocks into the frequency domain using a spectral transform;
identifying a plurality of frequencies and associated amplitudes for each set of the transformed digital blocks;
selecting a subset of the identified amplitudes based on the survivability of message information against signal manipulation;
choosing said subset of the identified amplitudes for each of the digital blocks using a primary mask from a key;
choosing message information using a transformation table generated with a convolution mask;
and,
encoding, using a processor, the chosen message information into said transformed digital blocks by altering the selected amplitudes based on the chosen message information.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/799,894Filed 4 May 2010 · continuation
Priority: 2 Apr 1998
Published: US 2010/0220861 A12 Sep 2010
Granted: 24 Sep 2013
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

H04L 9/14
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: using a plurality of keys…
G06T 1/0028
Image watermarking: adaptive watermarking, e.g. Human Visual System [HVS]-based watermarking
G06T 1/005
Image watermarking: robust watermarking, e.g. average attack or collusion attack resistant
G06T 1/0057
Robust watermarking, e.g. average attack or collusion attack resistant: compression invariant watermarking

Family

Application09/053,628Parent of this division · filed 2 Apr 1998
Application09/644,098Parent of this continuation · filed 23 Aug 2000
US 6,205,249 B1Parent of this division · filed 20 Mar 2001
Application11/358,874Parent of this continuation · filed 21 Feb 2006
US 7,035,409 B1Parent of this continuation · filed 25 Apr 2006
US 7,738,659 B2Parent of this continuation · filed 15 Jun 2010
US 2010/0220861 A1Pre-grant publication · published 2 Sep 2010
Application09/644,098Parent of this division
US 2006/0140403 A1Published application
US 8,542,831 B2This patent

From the US filing history. Foreign family members aren’t listed.

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