Assertion: tape recorder's head | /r/CreatedBy | one video frame
Facets:
Source sentences:
text: As with almost all cassette-based videotape systems, VHS machines pull the tape out from the cassette shell and wrap it around the inclined head drum which rotates at 1798.2 rpm in NTSC machines and at 1500 rpm for PAL, one complete rotation of the head corresponding to one video frame.