New pending patent applications are published by the PTO on Thursdays. Today's Spotlight Patent Applications concern digital fingerprinting and digital watermarking. Assigned to Websense, the first application discloses techniques for efficient detection of fingerprinted data and information. Assigned to Cisco, the second application discloses techniques for embedding data in a sequence of video frames.
20150381626, "Systems and methods for efficient detection of fingerprinted data and information," assigned to Websense.
The disclosed embodiments provide systems, methods, and apparatus for efficient detection of fingerprinted content and relate generally to the field of information (or data) leak prevention. Particularly, a compact and efficient repository of fingerprint ingredients is used to analyze content and determine the content's similarity to previously fingerprinted content. Some embodiments employ probabilistic indications regarding the existence of fingerprint ingredients in the repository.
20150379660, "System and method for embedding data," assigned to Cisco.
In one embodiment, a watermark is embedded in a sequence of video frames, for each one of the video frames, a set of N rectangular patches, two palettes of pixel values in a selected color space, such that the two palettes are denoted as P0 and P1, and P0.noteq.P1, and in each one of the N patches a processor which chooses one of P0 and P1 according to a value of a payload bit to be encoded, a calculator which calculates one of a variance of pixel values in the frame, and edginess for the pixel values in the frame, thereby determining a calculated value, and a processor which determines if the calculated value is beneath a given threshold value, if the calculated value is beneath the given threshold value the processor is operative to calculate a function of the pixel values, the closest value to a result of the calculation of the function in the chosen palette is chosen, and a replacer which replaces the pixel values within the patch with the chosen closest value. Related systems, apparatus and methods are also described.