Qumu Corporation

Priyadarshee Deeptarag Mathur

Samir Mittal

Xiwen Zhao

Christopher Ashley Wells

Robert J Reutiman

Robert William Johnson

In an embodiment, a method of decoding a watermarked video includes receiving a video including a watermark and three or more pilot signals. The method includes attempting to detect the watermark and retrieve a corresponding message in the video based on one or more decoding starting points of the video. The method includes outputting the message if the attempt is successful. If the attempt fails, the method includes detecting the pilot signals in the video; based on the detected pilot signals, estimating a geometric distortion of the video; inverting the geometric distortion for the video to generate a warped video; and attempting to detect the watermark and retrieve the corresponding message in the warped video based on one or more decoding starting points of the warped video.

Content watermarking

In an embodiment, a method of watermarking a video includes generating three or more pilot signals. The method also includes generating a watermark. The method also includes embedding the three or more of the pilot signals in first frames of the video. The method also includes embedding the watermark in second frames of the video according to a watermarking just-noticeable-difference (JND) model. The second frames may be non-overlapping with the first frames.

In an example, a method for secure publication of content is described. The method may include encrypting content with a media key. The method may also include providing the encrypted content to a client device associated with a private key and a public key. The private key may be stored at the client device. The method may also include encrypting the media key with the public key. The method may also include providing the encrypted media key to the client device.

Content distribution and aggregation

In an example, a method of securing content is described. The method may include instantiating a content server on a client device. The method may also include operating the content server to retrieve content identified by a Uniform Resource Identifier (URI). The method may also include serving the content from the content server to a content renderer on the client device. The content renderer may be configured to render the content at the client device and to prohibit saving the content in the clear on the client device.

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Chanhassen, MN, United States of America

Priyadarshee Deeptarag Mathur