New patents are issued by the USPTO on Tuesdays. Both of today's Spotlight Patents concern aspects of digital fingerprinting and digital watermarking. Assigned to Google,the first patent addresses techniques involving fingerprinting for early detection of policy violating media. Assigned to The Nielsen Company, the second patent addresses techniques for encoding a compressed media stream.
9,723,344, "Early detection of policy violating media," assigned to Google.
A media sharing system identifies fingerprints that represent an uploaded video and generates a digest based on the fingerprints. The media sharing system searches for digests of previously processed videos whose digests match the digest of the uploaded video. A previously processed video whose digest matches the digest of the uploaded video is identified as a matching video. For each matching video, the media sharing system retrieves policy information that describes whether the video was found to violate one or more policies of the media sharing system. The media sharing system determines whether to halt processing of the uploaded video based on the retrieved policy information.
9,721,576, "Compressed domain encoding apparatus and methods for use with media signals," assigned to The Nielsen Company.
Apparatus, methods, and articles of manufacture for encoding a compressed media stream are disclosed. Example method of watermarking a digital media signal disclosed herein include copying compressed audio packets associated with an audio stream included in a transport stream of the digital media signal into respective frames of compressed audio data to be watermarked to include media identification information. Such example methods can also include determining whether a composition of the transport stream has changed during copying of the compressed audio packets into the respective frames of the compressed audio data. Such example methods can further include, if the composition of the transport stream has changed, writing the frames of the compressed audio data to an output stream corresponding to the digital media signal without applying a watermark to the frames of the compressed audio data.