Abstract: Lossy compression and transmission of a downmixed composite signal having multiple tracks and objects, including a downmixed signal, is accomplished in a manner that reduces the bit-rate requirement as compared to redundant transmission or lossless compression, while reducing upmix artifacts. A compressed residual signal is generated and transmitted along with a compressed total mix and at least one compressed audio objects. In the reception and upmix aspect the invention decompresses a downmixed signal and other compressed objects, calculates an approximate upmix signal, and corrects specific base signals derived from the upmix, by subtracting a decompressed residual signal. The invention thus allows lossy compression to be used in combination with downmixed audio signals for transmission through a communication channel (or for storage).

Abstract: A method for designing microstructures for a light shaping reflector for use in a light field display is provided. A mathematical function is derived to reflect light uniformly from an incident light beam. Curved elements shaped by the mathematical function are combined to design the microstructures. The microstructures are formed in a reflective surface to provide the light shaping reflector for use in the light field display.

Abstract: To encode an arbitrary shape, a processor is configured to generate a rectangular block of transform coefficients by applying a discrete separable unitary transform to a rectangular boundary block of a video object. The boundary block includes a masked pixel and an unmasked pixel, the transform coefficients include a number of zero-valued transform coefficients greater than or equal to a number of masked pixels, and the transform coefficients include at least one non-zero-valued transform coefficient. The processor is also configured to generate an encoded output by compressing only the non-zero-valued transform coefficients.

Abstract: An apparatus comprising a processor configured to receive a video teleconferencing image, wherein the video teleconferencing image has a background and at least one foreground, wherein the foreground has a boundary, determine the boundary of the foreground, overlay the boundary of the foreground with a drawing area, wherein the drawing area obscures the boundary, and replace the background of the image with a new background.

Abstract: Lossy compression and transmission of a downmixed composite signal having multiple tracks and objects, including a downmixed signal, is accomplished in a manner that reduces the bit-rate requirement as compared to redundant transmission or lossless compression, while reducing upmix artifacts. A compressed residual signal is generated and transmitted along with a compressed total mix and at least one compressed audio objects. In the reception and upmix aspect the invention decompresses a downmixed signal and other compressed objects, calculates an approximate upmix signal, and corrects specific base signals derived from the upmix, by subtracting a decompressed residual signal. The invention thus allows lossy compression to be used in combination with downmixed audio signals for transmission through a communication channel (or for storage).

Abstract: Various embodiments of the present invention are directed to methods and systems for distributing digitally encoded information. In one embodiment of the present invention, a licensee desiring to purchase digitally encoded information from a copyright owner posts collateral with a third party entity. The third party entity then provides authentication information to the licensee. The licensee transmits proof of knowledge of authentication information to the copyright owner. The copyright owner sends proof of the licensee's knowledge of authentication information and digital media to the third-party entity. The third-party entity embeds the authentication information in the digitally encoded information, and delivers the digitally encoded information with embedded authentication information to the licensee.

Abstract: An apparatus comprising a processor configured to receive a video teleconferencing image, wherein the video teleconferencing image has a background and at least one foreground, wherein the foreground has a boundary, determine the boundary of the foreground, overlay the boundary of the foreground with a drawing area, wherein the drawing area obscures the boundary, and replace the background of the image with a new background.

Abstract: An apparatus comprising a processor configured to generate a rectangular block of transform coefficients comprising applying a discrete separable unitary transform to a rectangular boundary block of a video object, wherein the boundary block comprises at least one masked pixel and at least one unmasked pixel, wherein the transform coefficients comprise a number of zero-valued transform coefficients greater than or equal to a number of masked pixels, wherein the transform coefficients comprise at least one non-zero-valued transform coefficient; and generate an encoded output comprising compressing only the non-zero-valued transform coefficients.

Abstract: A method for designing microstructures for a light shaping reflector for use in a light field display is provided. A mathematical function is derived to reflect light uniformly from an incident light beam. Curved elements shaped by the mathematical function are combined to design the microstructures. The microstructures are formed in a reflective surface to provide the light shaping reflector for use in the light field display.

Abstract: Embodiments of the present invention pertain to determining whether a digital rights management system's native license is valid. According to one embodiment, a value of a decision indicator is accessed at a digital rights management system. The decision indicator is set by a trusted entity other than the digital rights management system because the digital rights management system does not have sufficient information to determine how to set the decision indicator. The value of the decision indicator is used at the decision rights management system to determine whether the native license associated with the digital rights management system is valid.

Abstract: A method for controlling transfer of data is provided. The method includes accessing data at a first device and accessing a time attribute associated with the data at the first device. The method further includes comparing the time attribute to a data transfer time threshold and in response to the time attribute associated with the data at the first device is less than the data transfer time threshold, the method further includes restricting access of the data at a second device.

Abstract: A rendering engine including a first component configured to render warped content that is generated remotely from the rendering engine by applying a warping transformation to stored content according to warping information and a second component configured to inversely warp the rendered warped content according to inverse warping information that corresponds to the warping information to form a reproduction of the stored content is provided. The second component is configured to inversely warp the rendered warped content subsequent to or contemporaneous with the warped content being rendered by the first component.

Abstract: Embodiments of the present invention pertain to determining whether a digital rights management system's native license is valid. According to one embodiment, a value of a decision indicator is accessed at a digital rights management system. The decision indicator is set by a trusted entity other than the digital rights management system because the digital rights management system does not have sufficient information to determine how to set the decision indicator. The value of the decision indicator is used at the decision rights management system to determine whether the native license associated with the digital rights management system is valid.

Abstract: A system and method for enabling access to more than one encrypted data segment of a segmentable data stream wherein the data stream includes a plurality of the encrypted data segments is disclosed. A relationship between at least two encrypted data segments to be accessed is determined. A key is provided to the related encrypted data segments to be accessed such that the provided key can be used to access the related encrypted data segments. The key is utilized to access the related encrypted data segments but the key is not required to provide access to the entire segmentable data stream.

Abstract: The invention relates to a signal comprising a runlength limited (RLL) encoded binary d,k channel bitstream 3, wherein parameter d defines a minimum number and parameter k defines a maximum number of zeroes between any two ones of said bitstream 3 or vice versa, comprising a number of sections of respectively N successive RLL channel bits, called RLL rows 8-13, 45, each RLL row 8-13, 45 representing a parity-check code-word, called row parity-check code-word, in which a so-called row-based parity-check constraint for said RLL row 8-13, 45 has been realized, characterized in that K sections of respectively N successive channel bits, called column parity-check rows 21, 22, 43, 44, 46, are located at predetermined positions of a group of M RLL rows 8-13, 45, K, N and M being integer values, said column parity-check rows 21, 22, 43, 44, 46 comprising a plurality of column parity-check enabling channel words 30, 42, 48, wherein each of said column parity-check check enabling channel words 30, 42, 48 realizes a so-

Abstract: A system (1) and method for extracting and detecting fingerprints and attaching an associated action to a first fingerprint. A signal comprising a data stream is captured by a fingerprint extractor (9). The fingerprint extractor (9) will extract the first fingerprint of user specified data within the data. An input device (20) is adapted to accept a first command to extract the first fingerprint and accept a second command to attach an associated action to the first fingerprint. A memory device (14) is adapted to store the first fingerprint and the associated action. A fingerprint detector (4) is adapted to capture the signal comprising the data stream, continuously extract a plurality of fingerprints from the data stream, and compare the plurality of fingerprints to the first fingerprint for a match. A control device (7) is adapted to execute the associated action upon detection of a match.

Abstract: A method of and system for distributing a content item to a recipient. The content item contains a marker linked uniquely to the recipient. At a first point in time, the marker is inserted in the content item. At a second point in time, an association between the marker and the recipient of the content item is registered. The first point in time lies before a point in time at which the recipient is known. The marker is preferably inserted by means of a watermark. In an embodiment the first point in time lies at a point in time at which processing load is relatively low. Multiple markers can be inserted in a single content item.

Abstract: The invention discloses a method of embedding information for high quality restoration of a media signal (typically an audio-visual signal) in a lower quality version of the signal. To this end, the signal x is encoded using a high quality encoder (Q2). The code sequences z produced by the high quality encoder are mapped into code sequences y that are associated with a hypothetical lower quality encoder (Q1). The latter code sequences y are transmitted. A simple decoder will decode the received sequences y, and thus reproduce a low quality version of the signal. A more sophisticated decoder is arranged to inversely map the received code sequences y into the code sequences z, that were actually produced by the high quality encoder (Q2). The sophisticated decoder will thus reproduce a higher quality version of the same signal.

Abstract: An improved method and arrangement for detecting a watermark in an information (e.g. image or video) signal are disclosed. The detection is more reliable and less vulnerable to image processing by partitioning the image into a sequence of blocks having a predetermined size, accumulating the blocks, computing a value indicative of the correlation of the accumulated blocks and the watermark having the predetermined size, and detecting whether the correlation value is larger than a predetermined threshold.