Abstract: Embodiments of the present invention comprise methods and systems for adapting a video transmission rate.

Abstract: A method for transmitting data streams from a transmitter to a plurality of receivers over a shared channel that includes a transmitter simultaneously transmitting a plurality of the data streams to the plurality of receivers of the shared channel. The method includes jointly adapting bit rates of the respective data streams being transmitted in accordance with the available bandwidth, a general target time, and a quality measure.

Abstract: A system for transmitting video from a plurality of transmitters to a plurality of receivers over a shared wireless channel includes a plurality of transmitters each receiving a respective video stream to transmit over the shared wireless channel. Distortion-related information is associated with each of the respective video streams and each of the plurality of transmitters having access to the distortion-related information for the respective video stream while not having access to the distortion-related information for other the video streams. Each of the plurality of transmitters using the respective distortion-related information of the respective the video stream to determine how to modify the video stream for transmission based upon a channel time constraint.

Abstract: A transmission systems suitable for video.

Abstract: A technique for describing an image where a number of test areas are located on the image.

Abstract: A method of determining the boundary of a slow motion replay of an event in a video includes determining a statistical measure of different portions of the video. The video may include the event and the slow motion replay of the event. Based upon the statistical measure determining the boundary of the slow motion replay of the event.

Abstract: A system for viewing audio-video content together with temporal information.

Abstract: A user profiling system preferably includes a set of fuzzy logic operators. Based upon the fuzzy logic operators the user profile may be updated.

Abstract: A system for structuring usage history for audiovisual materials.

Abstract: A user preferences description scheme that includes recurrence information.

Abstract: Descriptions of audio-visual material.

Abstract: A system for viewing audio-video content together with temporal information.

Abstract: A technique for describing an image where a number of test areas are located on the image.

Abstract: A technique for detecting semantically significant events in a video sequence.

Abstract: A system for structuring usage history for audiovisual materials.

Abstract: A method and apparatus for coding video data permits coding of video information with optional, enhanced functionalities. Video data is coded as base layer data and enhancement layer data. The base layer data includes convention motion compensated transform encoded texture and motion vector data. Optional enhancement layer data contains mesh node vector data. Mesh node vector data of the enhancement layer may be predicted based on motion vectors of the base layer. Thus, simple decoders may decode the base layer data and obtain a basic representation of the coded video data. However, more powerful decoders may decode both the base layer and enhanced layer to obtain decoded video permitting functionalities. An embodiment of the present invention provides a back channel that permits a decoder to affect how mesh node coding is performed in the encoder. The decoder may command the encoder to reduce or eliminate encoding of mesh node motion vectors.

Abstract: A system and method of encoding and decoding a dynamic mesh includes encoding and decoding a mesh geometry of a set of node points and encoding and decoding a mesh node motion vector for each node point.

Abstract: The invented method involves the object-based processing of parts of video frames referred to as Video Object Planes using 2-D meshes, wherein the color and shape information associated with the Video Object Planes are assumed to be known at every frame and wherein each video object is processed independently. The invented method more particularly involves utilization of the Alpha Planes, which contain the shape information, in object-based design of an initial 2-D mesh, wherein an Alpha Plane is used to form a constraining polygonal mesh boundary, as well as in object-based tracking of mesh node points, wherein motion vectors of nodes on the mesh boundary are constrained so that these node points always lie along the Alpha Plane boundary, by means of restriction of the search space or back-projection, and mesh-based Video Object Plane mapping takes into account any differences between the mesh boundary and the Video Object Plane boundary.