Abstract
We have designed a simple device that will encode, in machine readable form, multiple analog data in a video record. The analog data is visible to the user within the video frame permitting visual correlation of these signals with activity observed in the image. By superimposition of both analog and video data sets, the two are tightly synchronized and remain so in all copies of the data. The analog data can be separated from the image following digitization by a frame grabber. The bandwidth for each of the five analog channels is approximately 5 kHz. The device, which is essentially an eight channel video multiplexor, includes a video channel, a field counter, an amplitude calibration signal and five analog data channels. The amplitude calibrator allows corrections for gain errors that are particularly prevalent when data is stored on video tape.
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