Universal computer, recorded video interface
First Claim
1. A universal computer, recorded video interface comprising:
- A. an interface computer;
B. a computer to computer interface for connecting said interface computer to a host computer and for receiving from said host computer video control commands;
C. a computer to control cable interface for connecting said interface computer to a recorded video source, said cable interface providing a plurality of control lines for connection to said recorded video source; and
D. means connected to said interface computer for storing a table indicating to or from which of said control lines each of a plurality of recorded video source control signals is to be sent or received by said cable interface.
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Accused Products
Abstract
An interface computer having an RS232 port for connection to a host computer. The recorder is connected to the interface computer by a control cable providing more lines than required. The source provides a control signal on another line. This control signal is provided every frame or twice per frame, i.e., every field. Two tables identifying the control lines are stored. The user selects the type of equipment to be utilized and the table appropriate to most of such equipment is transferred to the random access memory of the interface computer. Frame identifying data is recorded periodically on one of the audio channels of the video equipment. When the host computer desires the video player to skip to a particular frame and number, the interface runs the video equipment to a stopping range of frames before the desired frame and then stops the video equipment. The video equipment will overshoot in rewind and fast forward and the overshoot varies depending on tape position. The stopping range is related to the maximum overshoot in fast forward and rewind, and to the slip from start to when video occurs. Thus when the video is restarted the first frame to appear will be approximately thirty frames before the desired frame so that the desired frame will come up within half a second.
57 Citations
29 Claims
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1. A universal computer, recorded video interface comprising:
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A. an interface computer; B. a computer to computer interface for connecting said interface computer to a host computer and for receiving from said host computer video control commands; C. a computer to control cable interface for connecting said interface computer to a recorded video source, said cable interface providing a plurality of control lines for connection to said recorded video source; and D. means connected to said interface computer for storing a table indicating to or from which of said control lines each of a plurality of recorded video source control signals is to be sent or received by said cable interface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 22, 23)
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19. A read-only memory having stored therein:
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A. a control program for a microprocessor of a univeral computer, recorded video interface; and
,B. at least one table relating which ones of a plurality of control lines are to carry each of a plurality of control command signals to a recorded video source; said control program utilizing said table to properly route said command signals to said control lines. - View Dependent Claims (20, 21, 24)
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25. The method of operating a recorded video source, having a play mode and variable overshoot in rewind and fast forward, to search for a target frame from a pre-existing frame, comprising the steps of:
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A. establishing a stopping range of frame numbers (x to y) before the target frame number, where x is an earlier frame than y; B. issuing a fast forward command to the source in response to said pre-existing frame number being less than or equal to x, and, then issuing a stop command to said source in response to the existing frame number being substantially equal to or greater than x; C. issuing a rewind command to said source in response to said pre-existing frame number being greater than or equal to y, and, then issuing a stop command to said source in response to the existing frame number being substantially equal to or less than y such that the target frame number will come up when the source is placed in the play mode. - View Dependent Claims (26, 27, 28, 29)
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Specification