163results about How to "Efficient representation" patented technology

This invention provides a system and method for efficient ray tracing propagation prediction and analysis. Given a site-specific model of a physical environment, the present invention places virtual obstructions known as reception surfaces within the environment. As radio waves are predicted to propagate through the environment and intersect with or encounter reception surfaces, the characteristics of the radio wave are captured and stored relative to the location of the interaction with the reception surface. The radio frequency channel environment at any point within the site-specific model can be derived through analysis of the radio wave characteristics captured at nearby reception surfaces.

Welding systems and sequence controllers therefor are presented for controlling components of a welding system during a welding operation. The sequence controller receives system inputs and provides control outputs to the system components, and includes a processing component, an executable sequence control program, and a state table file. The sequence control state table file includes a number of entries corresponding to welding operation states, where the individual entries comprise one or more instruction identifiers, instruction parameters, exit condition identifiers and corresponding next state identifiers. The sequence control program is executed according to the sequence controller inputs and according to the state table file to provide the sequence controller outputs, where the state table file can be easily modified or new state table files can be created and downloaded to the sequence controller to facilitate easy reconfiguration of a welding system.

Methods for interactive selecting video queries consisting of training images from a video for a video similarity search and for displaying the results of the similarity search are disclosed. The user selects a time interval in the video as a query definition of training images for training an image class statistical model. Time intervals can be as short as one frame or consist of disjoint segments or shots. A statistical model of the image class defined by the training images is calculated on-the-fly from feature vectors extracted from transforms of the training images. For each frame in the video, a feature vector is extracted from the transform of the frame, and a similarity measure is calculated using the feature vector and the image class statistical model. The similarity measure is derived from the likelihood of a Gaussian model producing the frame. The similarity is then presented graphically, which allows the time structure of the video to be visualized and browsed. Similarity can be rapidly calculated for other video files as well, which enables content-based retrieval by example. A content-aware video browser featuring interactive similarity measurement is presented. A method for selecting training segments involves mouse click-and-drag operations over a time bar representing the duration of the video; similarity results are displayed as shades in the time bar. Another method involves selecting periodic frames of the video as endpoints for the training segment.

A parametric representation of a multi-channel audio signal having parameters suited to be used together with a monophonic downmix signal to calculate a reconstruction of the multi-channel audio signal can efficiently be derived in a stereo-backwards compatible way when a parameter combiner is used to generate the parametric representation by combining a one or more spatial parameters and a stereo parameter resulting in a parametric representation having a decoder usable stereo parameter and an information on the one or more spatial parameters that represents, together with the decoder usable stereo parameter, the one or more spatial parameters.

A system and method for automatically monitoring communications networks and for determining network configuration use data stream characterizations. The system comprises a plurality of measurement probes that passively probe the network and collect data packets carried by data streams in the network. The system further comprises characterization computational units that process the collected data packets and produce data stream characterizations from the collected data packets. The data stream characterizations represent individual data streams in an arbitrarily unique manner. The system still further comprises a configuration processing unit that compares data stream characterizations taken at different points in the network and determines data stream paths through the network based on data stream characterization matching. The method for automatically monitoring communications networks comprises the steps of passively probing the data streams to produce sets of collected data packets from the data streams, determining data stream characterizations from the collected data packets, and comparing the data stream characterizations to one another to identify matching characterizations.

An interface that allows a user to model and analyze the properties of three dimensional surface and the regions surrounding such surfaces. The user manipulates a deformable physical modeling material that defines the geometry of a surface. A position sensor such as a laser scanner captures position data specifying the geometry of the surface. A processor processes the geometry data using a selected analysis function to produce result data representing computed characteristics of the surface or its surrounding region. The result data projected as an image onto the deformable surface. The interface permits the user to modify a surface geometry and directly visualize the characteristics of the modified geometry in real time.

Provided is a method of receiving multiview camera parameters for a stereoscopic image. The method includes: extracting multiview camera parameter information for a predetermined data section from a received stereoscopic image data stream; extracting matrix information including at least one of translation matrix information and rotation matrix information for the predetermined data section from the multiview camera parameter information; and restoring coordinate systems of multiview cameras by using the extracted matrix information.

An audio renderer comprises a receiver (801) receiving input data comprising early part data indicative of an early part of a head related binaural transfer function; reverberation data indicative of a reverberation part of the transfer function; and a synchronization indication indicative of a time offset between the early part and the reverberation part. An early part circuit (803) generates an audio component by applying a binaural processing to an audio signal where the processing depends on the early part data. A reverberator (807) generates a second audio component by applying a reverberation processing to the audio signal where the reverberation processing depends on the reverberation data. A combiner (809) generates a signal of a binaural stereo signal by combining the two audio components. The relative timing of the audio components is adjusted based on the synchronization indication by a synchronizer (805) which specifically may be a delay.

An interface that allows a user to model and analyze the properties of three dimensional surface and the regions surrounding such surfaces. The user manipulates a deformable physical modeling material that defines the geometry of a surface. A position sensor such as a laser scanner captures position data specifying the geometry of the surface. A processor processes the geometry data using a selected analysis function to produce result data representing computed characteristics of the surface or its surrounding region. The result data projected as an image onto the deformable surface. The interface permits the user to modify a surface geometry and directly visualize the characteristics of the modified geometry in real time.

The invention provides a new, efficient method for the assembly of protein tertiary structure from known, loosely encoded secondary structure constraints and sparse information about exact side chain contacts. The method is based on a new method for the reduced modeling of protein structure and dynamics, where the protein is described by representing side chain centers of mass rather than alpha-carbons. The model has implicit, built-in multi-body correlations that simulate short- and long-range packing preferences, hydrogen bonding cooperativity, and a mean force potential describing hydrophobic interactions. Due to the simplicity of the protein representation and definition of the model force field, the Monte Carlo algorithm is at least an order of magnitude faster than previously published Monte Carlo algorithms for three-dimensional structure assembly. In contrast to existing algorithms, the new method requires a smaller number of tertiary constraints for successful fold assembly; on average, one for every seven residues as compared to one for every four residues. The reliability and robustness of the invention make it useful for routine application in model building protocols based on various (and even very sparse) experimentally-derived structural constraints.

The purpose of the invention is to bridge the gap between parametric multi-channel audio coding and matrixed-surround multi-channel coding by gradually improving the sound of an up-mix signal while raising the bit-rate consumed by the side-information starting from 0 up to the bit-rates of the parametric methods. More specifically, it provides a method of flexibly choosing an “operating point” somewhere between matrixed-surround (no side-information, limited audio quality) and fully parametric reconstruction (full side-information rate required, good quality). This operating point can be chosen dynamically (i.e. varying over time) and in response to the permissible side-information rate, as it is dictated by the individual application.

A visualization graph is provided on a computer. Data is stored corresponding to a plurality of entities, wherein a semantic net includes the entities and wherein the entities are linked to each other by a plurality of relations. In response to a query with respect to an entity selected from the plurality of entities, a visualization graph representing the results of the query is provided. Entities are selected from the plurality of entities having at least one common relation and storing the selected entities as a plurality of groups.

A method and apparatus for rendering shadows. A pre-rendering process implements a two dimensional array or map of depth-based functions, such as a visibility function in z. During rendering of an object scene, these functions are accessed via lookup operations to efficiently determine the function value for a sample point at a given depth. The use of visibility functions allows for partial light attenuation effects. Each visibility function is computed by filtering multiple transmittance functions obtained by casting sample rays from a light source onto an object scene. The visibility function is implemented as a sequence of vertices. Colored shadows are modeled by vertices comprising a depth value and separate visibility function values for red, green, and blue light at a given depth value. Compression is achieved by minimizing the number of vertices needed to represent a visibility function within a desired error tolerance.

Techniques for execution of multiple threads in a multithreaded computing programming environment are disclosed. The techniques are especially well suited for environments that use multilayered programming architecture where a higher layer can build on the functions provided by a lower layer where the delay time is an important consideration. In one aspect, the conceptual notion of a “Worker” effectively serves to represent the thread-specific execution context for a thread of execution (“thread”) in a multithreaded computing environment. Another aspect, provides the notion of an Exclusion Area (EA) as logical lock that serves to protect shared resources in a multithreaded environment. The combination of the worker and EA are used to provide a powerful framework that, among other things, allows minimizing of the delay time.