Apparatus and method for cueing a video tape recorder
First Claim
1. Apparatus for positioning a location on a tape to a desired position which is continuously changing during a location positioning operation with a selectable desired velocity, wherein the continuously changing desired position is separated by a detectable distance from a current position, comprising:
- means for generating a detected distance signal indicative of the detected distance between the current position and the desired position which is continuously changing at the rate of the desired velocity from a desired time during the location positioning operation;
means for supplying a current velocity signal indicative of a current velocity of the tape;
means for providing a desired velocity signal indicative of the desired velocity of the tape at the continuously changing desired position;
means responsive to the desired velocity signal and the detected distance signal, for producing an intermediate velocity signal indicative of an intermediate velocity at which the tape presently is moved to achieve the desired velocity at the continuously changing desired position; and
means responsive to the intermediate velocity signal for adjusting the current velocity of the tape to that of the intermediate velocity.
3 Assignments
0 Petitions
Accused Products
Abstract
To position a cue location on a video tape to a scanner so that the information stored at the cue location can read by a transducer. The video tape is transported so that when the cue location arrives at the scanner, the tape is moving at a selectable desired velocity. A synchronous cueing function is also provided for, in which the cue location is advanced at the rate of the desired velocity during to cueing operation to allow the positioning to be synchronized with other devices when the cue operation is completed.
109 Citations
26 Claims
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1. Apparatus for positioning a location on a tape to a desired position which is continuously changing during a location positioning operation with a selectable desired velocity, wherein the continuously changing desired position is separated by a detectable distance from a current position, comprising:
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means for generating a detected distance signal indicative of the detected distance between the current position and the desired position which is continuously changing at the rate of the desired velocity from a desired time during the location positioning operation; means for supplying a current velocity signal indicative of a current velocity of the tape; means for providing a desired velocity signal indicative of the desired velocity of the tape at the continuously changing desired position; means responsive to the desired velocity signal and the detected distance signal, for producing an intermediate velocity signal indicative of an intermediate velocity at which the tape presently is moved to achieve the desired velocity at the continuously changing desired position; and means responsive to the intermediate velocity signal for adjusting the current velocity of the tape to that of the intermediate velocity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. Apparatus for transporting a tape along a path from a current position at a current velocity, to achieve a desired velocity at a desired position, wherein the desired position is changed from a desired time in response to the desired velocity, comprising:
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means for generating a current velocity signal indicative of current velocity; means for generating a desired velocity signal indicative of the desired velocity; means responsive to the desired position, the desired velocity and the desired time, for generating a current desired position signal indicative of the desired position changed via the desired velocity; means for detecting the distance between the current position and current desired position and generating distance signal indicative of said distance; means responsive to the desired velocity signal and the distance signal for generating an intermediate velocity signal indicative of a presently desired velocity; means responsive to said intermediate velocity signal and said current velocity signal for producing a velocity error signal; and means for adjusting the current velocity in response to said velocity error signal.
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19. Apparatus for transporting a tape along a path to synchronize the transport of a location on the tape transported at a current velocity from a current position, with a selectable desired velocity at a desired time from a desired position along the path of the tape separated by a detectable distance from the current position, the apparatus comprising:
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means responsive to the desired position, the desired velocity and the desired time for generating a current desired position indicative of the desired position changed at a rate of the desired velocity from the desired time to present; means for detecting the distance separating the current position and the current desired position and generating a detected distance signal indicative of the detected distance; means for detecting the current velocity of transport of the tape and generating a current velocity signal indicative of the current velocity; means for selecting the desired velocity for transport of the tape and generating a desired velocity signal indicative of the desired velocity; means responsive to the desired velocity signal and the detected distance signal for selecting an intermediate velocity at which the tape must presently be transported to synchronize the transport of the location on the tape with the desired velocity from the desired time at the desired position and generating an intermediate velocity signal indicative of the intermediate velocity; and means responsive to the current velocity signal and the intermediate velocity signal for adjusting the current velocity of the transport of the tape to the intermediate velocity. - View Dependent Claims (20, 21, 22, 23)
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24. Method of transporting a tape along a path to position a location on the tape transported at a current velocity from a current position, to achieve a selectable desired velocity at a desired position along the path separated by a detectable distance from the current position, wherein the desired position is changed at the rate of the desired velocity from a desired time, comprising:
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generating a current desired position indicative of the desired position changed at a rate of the desired velocity from the desired time to present in response to the desired position, the desired velocity and the desired time; detecting the distance separating the current position and the current desired position and generating a detected distance signal indicative of the detected distance; detecting the current velocity and generating a current velocity signal indicative of the current velocity; selecting the desired velocity and generating a desired velocity signal indicative of the desired velocity; selecting an intermediate velocity, in response to the desired velocity signal and the detected distance signal, at which the tape must presently be transported to achieve the desired velocity at the desired position and generating an intermediate velocity signal indicative of the intermediate velocity; and adjusting the current velocity of the tape to the intermediate velocity in response to the current velocity signal and the intermediate velocity signal. - View Dependent Claims (25)
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26. Method of transporting a tape along a path from a current position at a current velocity, to achieve a selected velocity at a desired changing position separated by a detectable distance from the current position, comprising:
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determining a current desired position indicative of the desired position changed at a rate of the selected velocity from a desired time to present, in response to the desired position, the selected velocity and the desired time; determining a detected distance between the current position and the current desired position; generating an intermediate velocity indicative of a presently desired velocity, in response to the selected velocity and the detected distance; producing a velocity error in response to said intermediate velocity and said current velocity; and adjusting the current velocity in response to said velocity error.
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Specification