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US 4,228,471 AGranted
Apparatus for searching a piece of information recorded on a magnetic tape
AssigneeVictor Company of Japan, Ltd.
InventorTakashi Shiga
Life of this patent
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AssigneeVictor Company of Japan, Ltd.
InventorTakashi Shiga
Estimating the term…
Apparatus and method for determining if a particular piece on a magnetic recording medium is to be played back or not. The medium includes plural pieces having starting locations randomly positioned and spaced along the length of the medium. Successive pieces from the medium are played back at higher speed than one can be perceived by an operator. From each piece played back at the higher speed there is sensed when a magnetic flux transition to none of the flux variations occurs between the end of each piece and the beginning of the next piece. In response to the sensed transition the speed of the medium is reduced to a normal playback speed for the operation. The normal playback speed is maintained for a predetermined interval at the beginning of the next piece. The interval is long enough to enable the operator to make a decision regarding the next piece. When the interval is completed, high speed playback is normally automatically resumed until the completion of the next piece.
An apparatus for searching for a piece of information prerecorded on a magnetic tape, the information being reproduced by a tape player including a tape drive mechanism and reproducing means, said apparatus comprising:
A tape recording and reproducing apparatus comprising:
A method of determining if a particular piece on a magnetic recording medium is to be played back or not, the medium including a plurality of pieces having starting locations randomly positioned and spaced along the length of the medium, each piece being represented by magnetic flux variations on the medium, the medium having none of the magnetic flux variations between the end of each piece and the beginning of the next piece, comprising playing back successive pieces from the medium at higher speed than can be perceived by an operator, from each piece played back at the higher speed sensing when a magnetic flux transition to none of the flux variations occurs between the end of each piece and the beginning of the next piece, in response to the sensed transition reducing the speed of the medium to a normal playback speed for the operator, maintaining the normal playback speed for a predetermined interval at the beginning of the next piece, said interval being long enough to enable the operator to make a decision regarding the next piece, and then, when the interval is completed, normally automatically resuming high speed playback until the completion of the next piece.
Dependencies are inferred from the claim text.