Methods, apparatus and programs for generating and utilizing content signatures
AssigneeDigimarc Corporation
InventorsHugh L. Brunk, Kenneth L. Levy
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Abstract
The presently claimed invention generally relates to deriving and/or utilizing content signatures (e.g., so-called “fingerprints”). One claim recites a method of generating a fingerprint associated with a content item including: pseudo-randomly selecting a segment of the content item; and utilizing a processor or electronic processing circuitry, fingerprinting the selected segment of content item as at least an identifier of the content item. Of course, other claims and combination are provided as well.
Claims20
A method comprising:
- pseudo-randomly selecting a segment of a content item;
- and
- utilizing a processor or electronic processing circuitry, fingerprinting the selected segment of the content item as at least an identifier of the content item, wherein the fingerprinting comprises at least one type of fingerprinting selected from a group of fingerprinting comprising:
- evaluating perceptually relevant features, a frequency domain analysis, hashing and a lossy transformation.
An apparatus comprising:
- a processor;
- and
- memory comprising instructions for execution by the processor, wherein the instructions are configured to:
- pseudo-randomly select a segment of a content item;
- and
- derive a fingerprint from the selected segment of the content item as at least an identifier of the content item, wherein the fingerprint comprises at least one type of fingerprint selected from a group of fingerprints comprising:
- perceptually relevant features, a frequency domain analysis, hashing and a lossy transformation.
A tangible computer-readable medium having instructions stored thereon, the instructions comprising:
- instructions to pseudo-randomly select a segment of a content item;
- and
- instructions to fingerprint the selected segment of the content item as at least an identifier of the content item, wherein the fingerprint comprises at least one type of fingerprint selected from a group of fingerprints comprising:
- perceptually relevant features, a frequency domain analysis, hashing and a lossy transformation.
Dependencies are inferred from the claim text.