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US 2006/0069919 A1Published application
Derivation and quantization of robust non-local characteristics for blind watermarking
AssigneeMicrosoft Corporation
InventorsM. Mihcak, Ramarathnam Venkatesan, Mariusz Jakubowski
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Abstract
An implementation of a technology is described herein for deriving robust non-local characteristics and quantizing such characteristics for blind watermarking of a digital good.
Claims18
A computer implemented method for facilitating the protection of digital signals, the method comprising:
- obtaining a digital signal;
- partitioning the signal into a plurality of segments using a secret key;
- and
- using quantization index modulation (QIM), detecting whether the signal includes a watermark, wherein such QIM is based upon non-local characteristics of the plurality of segments.
1 more element
One or more computer-readable media having computer-executable instructions that, when executed by a computer, perform the acts comprising:
- obtaining a digital signal;
- partitioning the signal into a plurality of segments;
- and
- quantizing statistics associated with each said segment to detect whether the signal contains a watermark, wherein the statistics associated with at least one said segment are determined from the non-local characteristics of a least two said segments.
1 more element
A system for facilitating the protection of digital signals comprising:
- a content provider configured to:
- partition a signal into a plurality of segments using a secret key;
- watermark the signal by performing quantization on statistics for each said segment;
- and
- a client configured to detect whether a received signal includes the watermark utilizing the secret key.
2 more elements
Dependencies are inferred from the claim text.