New patents are issued on Tuesdays by the USPTO. Both of today's Spotlight Patents concern aspects of digital watermarking. Assigned to The Nielsen Company, the first patent addresses down-mixing compensation for audio watermarking. Assigned to SIGONGmedia, the second patent addresses techniques for inserting watermarks through conversing contents automatically.
9,472,198, "Down-mixing compensation for audio watermarking," assigned to The Nielsen Company.
Example methods, apparatus, systems and articles of manufacture to implement down-mixing compensation for audio watermarking are disclosed. Example watermark embedding methods disclosed herein include determining respective attenuation factors for a plurality of audio bands based on energy values associated with down-mixed audio samples corresponding to a first audio channel of a multi-channel audio signal and a second audio channel of the multi-channel audio signal. Disclosed example watermark embedding methods also include embedding a watermark in audio samples of the first audio channel based on the attenuation factors.
9,471,950, "Device and method of inserting watermarks through conversing contents automatically," assigned to SIGONGmedia CO., LTD (KR)
Provided are a watermark insertion apparatus and method. The watermark insertion method includes acquiring content through upload by a user, storing the uploaded content, receiving a content conversion request from a user or a manager, determining whether content for which content conversion has been requested is video or an image, converting the content according to the determined content kind, and inserting watermark suitable for the content kind into the converted content.