Abstract: 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.

Abstract: A system and method for recording, detecting and tracking objects on a digital record to provide an effective and efficient means to improve performance during training experiences. Merely by way of example, a preferred embodiment of the invention utilizes a video recording device to record clay pigeon shooting experiences for the purpose of improving shooter performance by analysis of the video record. The invention provides a system attached a recording device to a weapon and a method to analyze the record that will identify the relevant events, determine object(s) location, determine if the event has a favorable outcome or not (e.g. hit/miss), and display the object(s) path prior to, during and after an event occurs (e.g. a shot). The method will also determine the weapon's aimpoint path relative to the object(s) location to provide an efficient and effective training aid.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: An apparatus comprises a storage medium, a recording head, a source of electromagnetic radiation, and a control circuit for modulating the source of electromagnetic radiation in response to a static deviation of a spacing between the recording head and the storage medium. A method of compensating a static deviation of a spacing between a recording head and a storage medium performed by the apparatus, and a method of precompensating for nonlinear transition shifts in a heat assisted magnetic recording system, are also provided.

Abstract: An apparatus comprises a storage medium, a recording head, a source of electromagnetic radiation, and a control circuit for modulating the source of electromagnetic radiation in response to a static deviation of a spacing between the recording head and the storage medium. A method of compensating a static deviation of a spacing between a recording head and a storage medium performed by the apparatus, and a method of precompensating for nonlinear transition shifts in a heat assisted magnetic recording system, are also provided.

Abstract: An apparatus comprises a storage medium, a recording head, a source of electromagnetic radiation, and a control circuit for modulating the source of electromagnetic radiation in response to a static deviation of a spacing between the recording head and the storage medium. A method of compensating a static deviation of a spacing between a recording head and a storage medium performed by the apparatus, and a method of precompensating for nonlinear transition shifts in a heat assisted magnetic recording system, are also provided.

Abstract: An NRRO compensation circuit controls a head position in a disc drive. The circuit has a first frequency circuit providing a first output corresponding to NRRO and a first characteristic sensing circuit that senses the first output and that generates a first control output that adjusts a first NRRO compensation gain. A first control circuit included in the NRRO compensation circuit receives the first control output and the first NRRO compensation gain and provides a first NRRO compensator output.

Abstract: An NRRO compensation circuit controls a head position in a disc drive. The circuit has a first frequency circuit providing a first output corresponding to NRRO and a first characteristic sensing circuit that senses the first output and that generates a first control output that adjusts a first NRRO compensation gain. A first control circuit included in the NRRO compensation circuit receives the first control output and the first NRRO compensation gain and provides a first NRRO compensator output.