Angiometrix Corporation

Motorola Corporation

Motorola Solutions, Inc.

Raghavan Subramaniyan

Goutam Dutta

Nitin Patil

Venugopal Gopinathan

Abhijit Anant Patki

Bhavan Gandhi

Faisal Ishtiaq

Tyrone D Bekiares

Kevin J O'Connell

Methods and systems for determining information about a vascular bodily lumen are described. An exemplary method includes generating an electrical signal, delivering the electrical signal to a plurality of excitation elements in the vicinity of the vascular bodily lumen, measuring a responsive electrical signal from a plurality of sensing elements in response to the delivered electrical signal, and determining a lumen dimension. Specific embodiments include generating a multiple frequency electrical signal. Another embodiment includes measuring a plurality of responsive signals at a plurality of frequencies. Still other embodiments include using spatial diversity of the excitation elements. Yet other embodiments use method for calibration and de-embedding of such measurements to determine the lumen dimensions. Diagnostic devices incorporating the method are also disclosed, including guide wires, catheters and implants. The methods and systems described herein are advantageous as they do not include injecting a second fluid for the measurements.

Methods and systems for determining vascular bodily lumen information and guiding medical devices

Pixels in a provided image for which the content has been provided in error are identified. This image content is processed to provide a version of the image wherein the error is at least partially concealed while also creating ancillary information regarding the errored pixel(s) and the spatial location to which such pixel(s) corresponds to thereby provide a record that describes which pixels in the image content were provided in error. An optional user-selectable option can permit displaying either of the aforementioned corrected version of the image wherein the error is at least partially concealed and a version of the image wherein the ancillary information is used to depict the errored pixel(s) such that provided-in-error pixels are readily distinguished from correctly-provided pixels.

Method and apparatus to facilitate creating ancillary information regarding errored image content

A method and apparatus for performing a predictive motion search in a video encoder system using motion vectors representing the difference in coordinates of a macroblock of data in a current frame of video data and coordinates of a related macroblock of data in a reference frame of video data. A plurality of motion vector predictors is obtained where the motion vector predictors represent approximations of possible motion vectors for a current macroblock. A search pattern is defined. Each motion vector predictor of the plurality of motion vector predictors is searched around using the search pattern. A final motion vector is then determined.

Method and apparatus for performing high quality fast predictive motion search

A method and apparatus for determining the quality of a block match for a candidate motion vector in a video encoder system using motion vectors representing the difference in coordinates of a macroblock of data in a current frame of video data and coordinates of a related macroblock of data in a reference frame of video data. The method can include defining a search pattern, searching a region based on the search pattern for a candidate motion vector for evaluation, calculating a difference metric, calculating a bias based on the difference between a predictor motion vector and a candidate motion vector, determining a modified difference metric by adding the difference metric to the bias, and defining a final motion vector based on the modified difference metric.

Method and apparatus for determining block match quality

The disclosed invention is a method to detect candidate errors within the picture start code, picture header, and picture timestamp. Upon detection, these errors may be confirmed and the impacts mitigated. An error within the timestamp bit field is adaptively detected by the use of a threshold comparison, and a mechanism for concealing the timestamp information leaves only a small timestamp anomaly. An error within the picture start code (PSC) is determined by adaptively analyzing the number of bits and the macro-block location of the next slice or GOB. If a PSC is suspected to have been overrun due to an error, this method allows for data beyond the first GOB or slice to be recovered in the frame. Depending on the extent of use of slices and GOBs, the method can recover a majority of the frame that otherwise would have been completely lost. A candidate error within the picture header is evaluated by utilizing the first slice or GOB of the frame and analyzing information from a previous frame to check whether the current frame's header information should be replaced with the previous frame's header information. Replacing the erred frame header can result in a majority of the data within the frame being recovered that would otherwise be discarded if the header was not replaced.

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Bengaluru, India

Raghavan Subramaniyan