Yesterday the USPTO published the first batch of 2008 patent applications. In today's spotlight are two dealing with fingerprinting and watermarking. Assigned to Microsoft, the first application describes techniques for DVD identification and managed copy authorization that use fingerprinting. Assigned to Verance, the second application describes techniques for signal continuity assessment using embedded watermarks.
20080005802, "DVD identification and managed copy authorization," assigned to Microsoft.
A "managed copy" capability is provided that is both sanctioned and supervised by a service provider so that multimedia content distributed on optical media such as DVD can be copied and used by a client in a controlled manner. In an illustrative example, a content provider generates a fingerprint using heuristics and/or other data that uniquely identifies a multimedia release, like a feature film, as being authorized for copying according to defined usage rules. A managed copy service authorizes the client to make a copy of a source DVD if that source is found to match a stored fingerprint. An identification response, which may include encoding parameters and usage rules, provides confirmation to the client that content on the source DVD is authorized to be copied. The client copies content from the source to another medium in compliance with the identification response.
20080002854, "Signal continuity assessment using embedded watermarks," assigned to Verance.
Methods, apparatus, and systems for signal continuity assessment using embedded watermarks are provided. The embedded watermarks are recovered from the content and one or more attributes associated with the recovered watermarks are identified. A continuity of the content can then be assessed in accordance with the one or more attributes. The continuity assessment may be based on a variety of factors, including but not limited to a determined heartbeat of the recovered watermarks, a density, separation, location, or extent, of the recovered watermarks, as well as information associated with the watermarks, such as a stego key, channel bits, packet numbers, a fingerprint, or the like.