ACQUISITION OF VIDEO IMAGES SIMULTANEOUSLY WITH ANALOG SIGNALS

摘要

A system provides for simultaneous collection, storage and analysis of up to 240 physiological analog signals and video signal samples. The output is a standard composite video signal containing analog and video data. The combined signals can be interleaved and stored in file format on videotape (19), or can be digitized by a frame grabber (18). Circuitry separates horizontal synchronizing pulses from a camera output, and a counter sequentially selects each electrophysiological channel on a sample-and-hold multiplexer. The intensity of each horizontal scan line from the multiplexer (11) output represents the amplitude of one sample of each physiological channel. This signal is then multiplexed with the video signal, such that a portion of each video line represents the physiological data. The combined output is stored together, providing a way for synchronizing the two signals for analysis.