Rotary head type digital signal playback

DETAILED DESCRIPTION It is therefore an object of the present invention to provide a rotary head type digital signal playback fully capable of regenerating signals in case scanning directions are shifted, i.
e.
, without regulating tape travel, precisely machining a drum and adjusting head positions.
The rotary head type digital signal playback according to the present invention is so arranged that, when digital signals recorded on a plurality of diagonal tracks of a recording medium with frame and block addresses added thereto are regenerated (each frame equivalent to a fixed time length being divided into a plurality of blocks), the signals regenerated by rotary heads are written to a memory in accordance with the frame and block addresses and read out of the memory on a block basis to obtain the regenerated digital signals.
The invention is characterized in that one diagonal track is scanned a plurality of times by the rotary head to allow the signal to be regenerated even if the angle at which the rotary head scan the track differs from the angle of inclination of the diagonal recording track.
When the number of rotations of the rotary head (the speed thereof) is set greater than that at the time of recording, the scanning pitch of the rotary head in the longitudinal direction of the tape becomes lower than the recorded track pitch, whereby one and the same rotary head is allowed to repeatedly scan the same track a plurality of times.
When a data signal is recorded in a digital form, the signal is recorded so that each frame equivalent to a fixed time length is divided into a plurality of blocks, with a frame address added to each frame and a block address added to each block.
This data is recorded on the tape so that each track contains multiple blocks, each with its own address.
It is therefore possible to write data equivalent to one frame to a memory even though the data is written to the memory in random order, provided the frame and block addresses can be identified on a block basis