Signal recording and reproducing apparatus

Dynamic magnetic information storage or retrieval – Recording for monetary delay of an analog signal

Patent

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Details

360 741, 360 744, G11B 500, G11B 1548

Patent

active

046654437

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to a signal recording and reproducing apparatus for recording audio or video signals on a recording medium such as magnetic tape and for reciprocatingly reproducing the recording and, more particularly, to a signal recording and reproducing apparatus in which the direction in which the tape runs during recording or reproduction, can be automatically reversed.


BACKGROUND ART

With a auto-reverse type audio tape recorder, that is, a tape recorder in which the terminal tape portion (tape end) is sensed during recording or reproduction for automatically reversing the tape running direction, the recording or reproduction may be interrupted during the reversal period resulting in the omission of a sound during such time. Since the mechanical operation is involved during the reversing of the rotational direction of the capstan, it is extremely difficult to lower the time required for such reversal to less than 0.1 second, even if the recorder is provided with a fast reverse mechanism. This may cause problems especially when recording and reproducing digital signals obtained by pulse code modulation of the audio signals. In such case, a signal omission over 0.1 second gives rise to an insufficient error correcting function and results in the inability to perform high quality reproduction with the possibility of abnormal sounds occurring.
The present invention contemplates providing a signal recording and reproducing apparatus whereby auto-reverse recording and reproduction are effected without signal omission so as to obtain temporarily-continuous playback signals.


DISCLOSURE OF THE INVENTION

The feature of the signal recording apparatus resides in the signal recording apparatus wherein, after at least one of the recording head and the recording medium has made relative movement relative to the other in a first direction, it is moved in a second direction opposite to said first direction for reciprocatingly recording input signals on said recording medium, wherein, according to the invention, means are provided for supplying said input signals to said recording head with a delay, and the amount of delay quantity in the input signals during running in said second direction is set to be longer than the delay in the input signals during running in said first direction, and the difference between these delays is set to be longer than the time required for the tape reversal from said first direction to said second direction.
The feature of the signal recording and reproducing apparatus according to the present invention resides in apparatus wherein, after at least one of the recording head and the recording medium has relative movement relative to the other in a first direction, it is moved in a second direction opposite to said first direction so as to reciprocatingly recording input signals, and the thus reciprocatingly recorded recording medium is caused to travel in said first and second directions for reproducing the recording with a reproducing head, wherein, according to the invention, during recording, means are provided for supplying said input signals to said recording head with a delay, and the delay in the input signals during running in said second direction is set to be longer than the delay in the input signals during running in said first direction and the difference the delay is set so as to be longer than the time required for the tape reversal from said first direction to said second direction. During reproduction, means are provided for delaying the reproduced signals from said reproducing head, with the delay of the reproduced signal prior to the movement reversal being set to be longer than the delay of the reproduced signal after the movement reversal, and the output from said delay means is removed as substantially continuous signals.
The feature of the signal recording apparatus according to the present invention is that input signals are reciprocatingly recorded on the recording medium, and, according to the invention, reversal marking signals indic

REFERENCES:
patent: 3641502 (1972-02-01), Whiteheed
patent: 4301482 (1981-11-01), Trevithick
patent: 4408234 (1983-10-01), Furura

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