Envivio, Inc

France Telecom

Julien Signes

Eric Deniau

Yuval Fisher

Olivier Ondet

A technique wherein the number and position of a quantization parameter node is determined in response to the quantization parameters and a preselected error. The size of scene graph and the corresponding amount of memory required to store the scene graph can be reduced by selective placement of quantization parameter nodes in a scene graph. The scene graph is traversed depth first to establish an order and then traversed in reverse. At each node, a calculation relating to (1) the relative cost of inserting a quantization parameter node and (2) the relative savings that result from insertion of a quantization node is performed. Quantization parameter nodes are selectively placed in response to a result of these calculations. The maximum degree of acceptable error value is chosen for each quantization type. This error value limits the number of quantization parameter nodes that can be placed in a scene graph.

Quantization and compression of information in a direct acyclic graph

A method and system for encoding a video stream using a compact representation for rotations and normals. The method and system convert rotations and normals into normalized rotations and normals and then project the normalized versions onto a unit cube. Each rotation and normal is encoded according to on which face it was projected. In addition, motion can be compactly represented by movement across the unit cube.

Method and system for encoding rotations and normals in 3D generated scenes

A method and system for encoding multimedia content using dynamic interfaces. By providing an extendable, programmatic interface to the content of a scene, a scene may be more efficiently encoded than a scene in which each characteristic of each object in the scene is explicitly specified in the video stream for each frame. Exemplary scene characteristics that can be encoded include quantizing values, animation parameters and update parameters.

Method and system for controlling multimedia streams using dynamic prototypes

A method and system for uniformly encoding arrays of values in a video stream. Using a data type of an element to be encoded, a predictive value is quantized and encoded as part of a video stream. The resulting video stream efficiently encodes rotations, normals, and vectors.

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San Francisco, CA, United States of America

Julien Signes