| 摘要 |
To store digital data on a magnetic tape at a bit rate which does not exceed the storage capabilities of the tape of about 80 Mbit/s, although received digital video signals have a bit rate of about 200 Mbit/s, the video signals are split into two channels and applied to a head wheel having four transducer heads, and the bits are applied to the transducer heads in time-expanded form, with the wrap angle of the tape exceeding 180 DEG , time expansion being carried out at a rate related to the excess wrap angle, so that the track of recording will have a smaller recording angle ( beta 2) than heretofore ( beta 1), the time-expanded signals being recompressed upon reproduction. Time compression and expansion is preferably carried out by buffer memories which have data entered and read-out in the FIFO method, at respectively different clock rates, switched under control of a control unit (26) which receives head wheel position input signal information.
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