Patent · US Active

Projection based hashing that balances robustness and sensitivity of media fingerprints

US8542869B2 · kind B2 · utility

9Cited by

4References

15Claims

0Family size

Assignee

Dolby Laboratories Licensing Corporation · US

Inventors

Junfeng He · New York, US
Regunathan Radhakrishnan · Foster City, US
Claus Bauer · Cologne, DE

Key dates

Filing date	May 25, 2011
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Feb 8, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG06V10/7715
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Multiple candidate feature components of media content or projection matrices (or other hash functions, e.g., non-linear projections) are identified. Each of the candidate projection matrices (or other hash functions) includes an array of coefficients that relate to the candidate features. A subgroup of the candidate features or the projection matrices (or other hash functions) are selected based at least partially on an optimized combination of at least two characteristics of the candidate features or projection matrices (or other hash functions). Media fingerprints that uniquely identify the media content are derived from the selected optimized subgroup. Optimal projection matrices (or other hash functions) may be designed. Performance or sensitivity (e.g., search time) characteristics of the fingerprints are thus balanced with robustness characteristics thereof.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.