General Instrument Corporation

Nuvasive, Inc.

Robert Stone

Allen B Farquhar

Siu-Wai Wu

Robert S Nemiroff

Vincent C Liu

Michael A Casteloes

Rebecca Lam

The present invention involves a system and methods for performing neurophysiologic assessments including, but not necessarily limited to, pedicle integrity assessments, neuromuscular pathway assessments, nerve proximity assessments, and spinal cord assessments, and methods for filtering EMG signal data to reject noise.

Systems and methods for performing neurophysiologic assessments

A statistical multiplexer for coding and multiplexing multiple channels of digital television data, or multiple panels of HDTV digital television data. A bit rate need parameter is determined for each encoder in a stat mux group, and an encoding bit rate is allocated to each channel based on its need parameter. A transmission bit rate is allocated to each channel as a time-lagged version of its need parameter to minimize a rate mismatch between the output and the input of a decoder buffer. A packet processor checks for impending decoder buffer overflow or underflow events to set minimum and maximum limits on the transmission bit rate. Moreover, these limits are set based on whether a new transmission bit rate can be implemented before the decoding time stamp (DTS) of the current or next frame.

Method and apparatus for determining a transmission bit rate in a statistical multiplexer

Still picture images are encoded and transmitted at reduced rates using the MPEG-2 standard. Video frames are captured for processing at a still picture capture rate that is lower than the video input frame rate. The captured frames are compressed as Intra frames at the input frame rate. Selected ones of the compressed frames are inserted in the MPEG-2 transport stream for communication to a decoder at a still picture repetition rate which is no less, in frames per second, than the capture rate.

Still picture processing for MPEG-2 video

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Robert Stone