Tuesday's the USPTO issues new patents. Today's Spotlight patents address the use of fingerprinting and watermarking in content protection. Assigned to Intel, the first patent concerns techniques for fingerprinting digital video for rights management in networks. Assigned to Hitachi, the second patent concerns digital content protection using invisible and visible watermarks.
7,336,841, "Fingerprinting digital video for rights management in networks," assigned to Intel.
Systems and methods generate video fingerprints for video data streams. A collection of sub-fingerprints constitute a fingerprint block. The size and temporal position of the block is chosen to represent the video that is being served. The video server has prior information about the video semantics. Based on this information, the server generates control codes that identify which blocks, based on time/byte offsets, in the sequence best represent the video object. The video receiver is equipped with facilities to generate these fingerprint blocks. The block(s) are sent back to the server. The server is equipped with facilities to verify and record the mismatches with respect to references. The mismatch statistics may be archived for use in a number of applications.
7,337,321,"Digital content protection using invisible and visible watermarks," assigned to Hitachi (JP).
A technique for distributing digital contents capable of effectively protecting copyrights and the like on the basis of invisible electronic watermark information and electronic watermark information is to be provided. On the sending side, additional information including copyright-related information is embedded into digital contents in advance as invisible electronic watermark information, while on the receiving side, additional information as the embedded invisible electronic watermark information is decoded and extracted as visible watermark information, the extracted information is embedded again into the digital contents, and the additional information is distributed or outputted as visible information together with the digital contents.