Video signal recording and reproducing apparatus with tape speed control
Abstract
Abstract IN A VIDEO SIGNAL RECORDING AND REPRODUCING APPARATUS HAVING A MAGNETIC HEAD OR HEADS FOR RECORDING AND REPRODUCING A VIDEO SIGNAL ON A MAGNETIC TAPE DRIVEN AT A VARIABLE SPEED, AND IN WHICH FIRST AND SECOND REFERENCE SIGNALS ARE GENERATED WITH DIFFERENT POLARITIES FOR THE ODD AND EVEN NUMBERED FIELDS OF A VIDEO SIGNAL, FOR EXAMPLE, IN RESPONSE TO A VIDEO SIGNAL BEING REPRODUCED FROM THE TAPE AND AN EXTERNAL VIDEO SIGNAL, RESPECTIVELY, THERE IS PROVIDED A SERVO SYSTEM WHICH, THROUGH CONTROLLING THE SPEED AT WHICH THE TAPE IS DRIVEN, ACHIEVES FRAME MATCHING OR COINCIDENCE OF THE REPRODUCED AND EXTERNAL VIDEO SIGNALS AND ALSO ACHIEVES A TRACKING SERVO OPERATION, THAT IS ACCURATE TIME COINCIDENCE OF THE LIKE-NUMBERED FIELDS OF THE REPRODUCED AND EXTERNAL VIDEO SIGNALS.
Inventors
- 👤 H Sakamoto
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |