Robin, Blecker, Daley and Driscoll
Reproducing apparatus
 A reproducing apparatus for reproducing signals from a record bearing medium, on which a video signal and some other signal are recorded in a plurality of blocks, includes discriminating circuitry for determining at least whether the signal recorded in each of the blocks is a video signal or other signal, a storing device for storing the result of the discrimination made by the discriminating circuitry, a reproducing unit for selectively reproducing the records of the blocks on the basis of information obtained from the storage device, and a display. Control of the apparatus is such that, if a signal recorded in a block currently accessed for reproduction is determined not to be a video signal, the display so indicates. 
Canon Kabushiki Kaisha
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Hirokazu Masahiko Yasutomo Hiroyuki Shigeo
Takahashi Ogawa Suzuki Horii Yamagata