Television system for the display of visuals with high resolution

• US 3,983,328 A
• Filed: 03/07/1975
• Issued: 09/28/1976
• Est. Priority Date: 03/07/1975
• Status: Expired due to Term

• Current Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Original Assignee: Westinghouse Electric Corporation (Paramount Global (f/k/a ViacomCBS Inc.))
• Inventors: Newell, George F.
• Primary Examiner(s): Safourek, Benedict V.
• Assistant Examiner(s): Coles, Edward L.
• Application Number:
  US05/556,373
• Time in Patent Office: 571 Days
• Field of Search: 178/6.8, 178/DIG. 23, 178/DIG. 1, 178/6, 178/DIG. 3, 178/7.5 SE
• US Class Current: 386/203
• CPC Class Codes: H04N 11/24 High-definition television systems
• CPC Class Codes: H04N 5/7605 on discs or drums H04N5/781, H04N5/805, H04N5/83, H04N5/85 take precedence
• CPC Class Codes: H04N 5/781 on disks or drums

Abstract

In a television system, the display by a monitor forms a high resolution window-like frame that is selectively movable about a larger scene which is transmitted as an array of contiguous frames. Separate tracks on a disc-type recorder are used to store a video signal from a camera corresponding to each frame making up the array of contiguous frames in the scene. Either the camera or the scene is repositioned to view each frame in the scene. The video signals are recorded at phase-displaced relations by phase shifting the sweep waveform supplied to the camera while scanning each component of the scene. The replayed video signals corresponding to the array of contiguous frames in the scene are blanked by gates controlled by adjustable delay circuits to select a single frame of unblanked video signal for display by a monitor which corresonds to a portion of the entire scene.

Claims

1. In a television system of the type wherein a portion of a transmitted scene is displayed by a television receiving tube with high resolution as compared with the display resolution of the entire scene by the same television receiving tube, the combination comprising:

means for producing separate video signals corresponding to separate frames forming an array of component frames of a scene,

a storage medium including independent recording means to separately record the video signal corresponding to each frame in the array of frames forming the scene,

timing control means to synchronize the video signals in phase-shifted relations for separate recording by said storage medium such that a video signal corresponding to one component frame of the scene is recorded at a predetermined time-displaced relation to the recording of the video signal corresponding to a different component frame that is contiguous therewith in the scene, said timing control means including time delay means for each one of at least some of the separate video signals,

means coupled to each time delay means for producing a sync phase control signal,

sync generator means for applying horizontal and vertical scan control pulses to said means for producing separate video signals, and

control means for coupling each sync phase control signal to said sync generator means to phase shift the horizontal and vertical scan control pulses and thereby provide phase-shifted video signals corresponding to the component frames in the array forming the scene.

2. In a television system according to claim 1 wherein said storage medium includes the first recording and replay means for horizontal scan lines of a first video signal corresponding to a first component frame of an array of contiguous frames making up a scene, second recording and replay means for horizontal scan lines of a second video signal corresponding to a second component frame which is horizontally contiguous with said first component frame, and third recording and replay means for horizontal scan lines of a third video signal corresponding to a third component frame which is vertically contiguous with said first component frame.

3. In the television system according to claim 1, the combination further comprising means for modulating a subcarrier with the phase-shifted and separate video signals delivered from said means for producing separate video signals, and control means for coupling the video signals in the phase-shifted relation with said storage medium for separate and independent recording thereof.

4. In the television system according to claim 3 wherein said time delay means includes at least one delay circuit for phase shifting the sync control signal by a time period corresponding to the horizontal blanking interval between the horizontal scan control pulses.

5. In the television system according to claim 3 wherein said time delay means includes at least one delay circuit for phase shifting the sync control signal by a time period corresponding to approximately the vertical blanking intervals of the scan control pulses.

6. In the television system according to claim 3 wherein said time delay means includes at least one delay circuit for phase shifting the sync control signal by a time period corresponding to the sum of the blanking interval of a horizontal sync pulse and the blanking interval of a vertical sync pulse.

7. In the television system according to claim 3 wherein said means for producing a sync phase control signal includes means for replaying a recorded control signal from a separate recording track on said storage medium, and amplifier means for the replayed recording of the replayed recording of the control signal.

8. In the television system according to claim 1, the combination further comprising television display means including a cathode-ray tube for displaying a frame of a video signal representing only a portion of the video signals selected from the array of frames in the scene, and control means including gates for blanking out all but a contiguous portion of the replayed separate recordings of video signals from said storage medium to form a selected single frame of video signal for display by the cathode-ray tube.

9. In a television system of the type wherein a portion of a transmitted scene is displayed by a television receiving tube with high resolution as compared with the display resolution of the entire scene by the same television receiving tube, the combination comprising:

means for producing separate video signals corresponding to separate frames forming an array of component frames of a scene,

a storage medium including independent recording means to separately record the video signal corresponding to each frame in the array of frames forming the scene,

timing control means to synchronize the video signals in phase-shifted relations for separate recording by said storage medium such that a video signal corresponding to one component frame of the scene is recorded at a predetermined time-displaced relation to the recording of the video signal corresponding to a different component frame that is contiguous therewith in the scene,

sync generator means for producing horizontal and vertical scan control pulses,

gate means for blanking out all but a single video signal frame consisting of contiguous portions of the replayed separate recordings of video signals from said storage medium,

time delay circuit means for applying phase control signals to said gate means and said means for generating horizontal and vertical scan control pulses, and

means coupled to said gate means and said sync generator means for combining in a synchronous relation the unblanked video signal frame received from said gate means with horizontal and vertical scan control pulses received from said sync generator.

10. In the television system according to claim 9, the combination further comprising adjustable control means coupled to said time delay circuit means for biasing the phase control signals applied to said gate means and said sync generator means to thereby select the contiguous portions from the replayed separate recordings of video signals that form the single video signal frame for display by a receiving tube.

11. In the television system according to claim 9, the combination further comprising means in the replay signal path from said storage medium to said gate means for amplifying and demodulating the replayed separate recordings of video signals.

12. In the television system according to claim 9, the combination further comprising means including an amplifier coupled to said time delay circuit for replaying a recorded control signal from a separate recording track on said storage medium.

13. In the television system according to claim 9 wherein said gate means includes a blanking gate coupled in the replay signal path of each recorded video component frame for blanking out all but portions of selected horizontal scan lines thereof which form with the other unblanked portions of selected horizontal scan lines a single video signal frame.

14. In a television system, a method for producing a high resolution display frame corresponding to a window-like portion of an entire scene, said method including the steps of:

generating phase-shifted synchronizing waveforms for each one of at least some of separate video signals to control the production of the separate video signals with corresponding phase-shifted relations such that the active video portions of scan lines for contiguous horizontally-arranged frames are continuous and the active video portions of scan lines for contiguous vertically-arranged frames for coincidentally timed,

using the phase-shifted synchronizing waveforms to control a sync generator to produce corresponding horizontal and vertical scan control pulses,

using said horizontal and vertical scan control pulses for producing separate video signals corresponding to separate frames of an array of contiguous component frames forming a scene,

storing the separate video signals in their phase-shifted relation, and

selecting contiguous active video portions of unblanked scan lines from the replayed stored video signals to form a single video frame for displaying a window-like portion of the entire scene.

15. In the television system according to claim 14, the method including the further steps of adding adjustably-controlled time synchronizing waveforms to the selected contiguous portion of unblanked scan lines forming the single video frame, and controlling the selection of the contiguous active video portion of unblanked scan lines according to the adjustably-controlled time synchronizing waveforms.