New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of digital watermarking. Assigned to Nagravision, the first patent addresses techniques for embedding watermarks in uncompressed video data. Assigned to Verance, the second patent addresses techniques that facilitate accessing metadata associated with a primary audio visual content.
9,602,890, "Method and device to embed watermark in uncompressed video data," assigned to Nagravision (CH).
Abstract
A system and method to watermark an uncompressed content received at a client device in a compressed form and encrypted by at least one content key, said content key as well as watermark instruction forming Conditional Access Module (CAS) data, said CAS data being encrypted by a transmission key and comprising at least one signature to authenticate the CAS data, said client device comprising a CAS configured to process the CAS data, a descrambler having an input to receive the encrypted compressed content and an output to produce an compressed content, a decoder to convert the compressed content into uncompressed content, a watermark inserter connected to the output of the decoder, a secure activation module connected with the watermark inserter, a secure element connected with the watermark inserter and the secure activation module.9,602,891, "Service signaling recovery for multimedia content using embedded watermarks," assigned to Verance.
Abstract
Methods, devices, systems and computer program products facilitate accessing metadata associated with a primary audio visual content. Upon reception of a primary content, one or more watermark messages are extracted from the primary content obtain a server code and an interval code. A query to a metadata server is initiated based on the information obtained from the extracted watermark messages. In response to the query, service recovery information is received that includes information identifying one or more timed events, where each timed event identifies an operation to be performed at a corresponding instant in time as the primary content is being presented by the receiver device. One or more operations identified the timed events are initiated at the corresponding instant(s) in time.
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