New patents are issued by the USPTO on Tuesdays. This week's Spotlight Patents concern aspects of digital watermarking. Assigned to Qumo, the first patent addresses techniques for decoding a watermarked video includes receiving a video including a watermark and three or more pilot signals. Assigned to Dell, second of this week's patents addresses techniques for digital watermarking for securing remote display protocol output.
9,773,290, "Content watermarking," assigned to Qumu Corporation.
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.
9,774,877, "Digital watermarking for securing remote display protocol output," assigned to Dell.
A digital watermark can be embedded within remote display protocol output. When host-side rendering is employed, the decoder on the client side can include a digital watermark component that can add a digital watermark to the remote display protocol output during the decoding process. This digital watermark can be specific to the end user and/or client device to thereby enable any misappropriation of the remote display protocol output to be traced back to the end user. The digital watermark can be added as a clearly visible portion of the remote display protocol output or can be added as an invisible (i.e., hidden) portion of the remote display protocol output.