On Thursdays the USPTO publishes new pending patent applications.Today's Spotlight Applications concern aspects of fingerprinting and watermarking. Assigned to Arbitron, the first patent discloses techniques for determinimg contextual characteristics of media exposure data. Assigned to LG Electronics (KR), the second application discloses techniques for embedding watermarks in contents and for detecting embedded watermarks.
20120245978, "System and method for determinimg contextual characteristics of media exposure data," assigned to Arbitron.
Systems and methods are disclosed for providing contextual information to research data relating to media exposure. Ambient fingerprints are formed on a device, where the fingerprints are used to establish a logical location where media exposure took place. The ambient signatures are alternately combined with monitored data to provide more robust data sets for contextual processing.
20120243727, "Device and method for embedding watermarks in contents and for detecting embedded watermarks," assigned to LG Electronics (KR).
Provided are a device and method for detecting watermarks in content carrying watermarks. One method for watermark detection according to the present invention comprises the steps of: extracting the label of a frequency component of the content; generating a bit sequence by making bit values correspond on the basis of changes in the label being extracted; checking correlation while shifting the phase of the band-spreading code (pn sequence) with respect to the generated bit sequence; and checking the amount of phase shift in the band-spreading code at times when the correlation checked in this way falls into the category of autocorrelation, and then determining a bit group having a value corresponding to the amount of phase shift checked in this manner. The bit group determined in this way constitutes part of watermark data.