The View-Master Interactive Vision was a children's edutainment console from 1988. The games were held on VHS tapes consisted of VHS footage with computer graphics generated over the footage. This was done by playing the tape in the VCR and passing the video signal through the console. The console would identify game code hidden in the video signal (the barcode on the right side of the frame) and use this to generate the graphics in real time. This enabled a mixture of full-motion-video and more traditional game graphics of the time. Also, because the console connected with mono audio, but the developers wanted the console to be able to switch to an alternate audio track, they hid a second audio track inside the video signal (the waveform on the left side of the frame). The console is able to interpret this and play back the hidden audio

The three part video and the combined version marked [Graphics] were taken from GCIntVis on youtube.

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