US3787615A
Expired / Lapsed
US
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Method and apparatus for synchronizing a videosignal reproduced from a tape by means of a rotating head wheel
Assignee: Robert Bosch Fernsehanlagen GmbH
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Filing: 1972-05-19
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Granted: 1974-01-22
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Expires: 1992-05-19
Abstract
Abstract Method and apparatus for synchronizing a video signal with reference signals to shorten the run-in period of video tape recorders.
Inventors
- 👤 H Foerster
- 👤 U Brauch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:36
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods of the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 2
Independent Claim
148 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods of the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 3
Independent Claim
140 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulses, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape so long as said numbers are not equal, and F. transporting said video tape with the nominal velocity if said numbers are equal.
Claim 4
Independent Claim
140 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulses, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape so long as said numbers are not equal, and F. transporting said video tape with the nominal velocity if said numbers are equal.
Claim 5
Independent Claim
151 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the numbers of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape at a constant difference so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 6
Independent Claim
151 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the numbers of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape at a constant difference so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 7
Independent Claim
151 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape dependent on the difference of said numbers so long as the difference does not reach a predetermined number, and F. transporting said vIdeo tape with the nominal velocity when said predetermined number is achieved.
Claim 8
Independent Claim
151 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the velocity of said video tape dependent on the difference of said numbers so long as the difference does not reach a predetermined number, and F. transporting said vIdeo tape with the nominal velocity when said predetermined number is achieved.
Claim 9
Independent Claim
165 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with greater velocity than the nominal velocity, if the difference of said compared numbers is smaller than half the number of control pulses between successive indicating pulses.
Claim 10
Independent Claim
165 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with greater velocity than the nominal velocity, if the difference of said compared numbers is smaller than half the number of control pulses between successive indicating pulses.
Claim 11
Independent Claim
165 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with smaller velocity than the nominal velocity, if the difference of said compared numbers is greater than half the number of control pulses between successive indicating pulses.
Claim 12
Independent Claim
165 words
A method for synchronizing the indicating pulses recorded in combination with the control signal in the control track of video tape with reference indicating pulses by controlling the velocity of said video tape, comprising the steps of: A. reproducing said control signal and said indicating pulses from said video tape, B. counting the number of periods or the number of control pulses of said control signal respectively following each indicating pulse, C. counting the number of periods or the number of control pulses of said reference control signal respectively following each reference indicating pulse, D. comparing the numbers of the counted control pulses and the counted reference control pulses, E. changing the nominal velocity of said video tape so long as the difference of said numbers does not reach a predetermined number, and F. transporting said video tape with smaller velocity than the nominal velocity, if the difference of said compared numbers is greater than half the number of control pulses between successive indicating pulses.
Claim 13
Independent Claim
158 words
A system for synchronizing the indicating pulses recorded in combination with the control signal on the control track of video tape with reference indicating pulses by means for controlling the velocity at which said video tape is transported by a means for transporting the video tape, comprising: A. a first counter for counting the number of periods or pulses of said control signal reproduced from said control track following each indicating pulse separated from the reproduced signal, B. a second counter for counting the number of periods or pulses of a reference control signal following each reference indicating pulse, C. a comparator for the counted numbers of periods or pulses for controlling said means for transporting said video tape by changing the velocity of said video tape so long as the difference of said counted number does not reach a predetermined number and by transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 14
Independent Claim
158 words
A system for synchronizing the indicating pulses recorded in combination with the control signal on the control track of video tape with reference indicating pulses by means for controlling the velocity at which said video tape is transported by a means for transporting the video tape, comprising: A. a first counter for counting the number of periods or pulses of said control signal reproduced from said control track following each indicating pulse separated from the reproduced signal, B. a second counter for counting the number of periods or pulses of a reference control signal following each reference indicating pulse, C. a comparator for the counted numbers of periods or pulses for controlling said means for transporting said video tape by changing the velocity of said video tape so long as the difference of said counted number does not reach a predetermined number and by transporting said video tape with the nominal velocity when said predetermined number is achieved.
Claim 15
Independent Claim
154 words
A system for synchronizing the indicating pulses recorded in combination with the control signal on the control track of video tape with reference indicating pulses by means for controlling the velocity at which said video tape is transported by a means for transporting the video tape, comprising: A. a first counter for counting the number of periods or pulses of said control signal reproduced from said control track following each indicating pulse separated from the reproduced signal, B. a second counter for counting the number of periods or pulses of a reference control signal following each reference indicating pulse, C. a comparator for the counted numbers of periods or pulses for controlling saiD means for transporting said video tape and transporting said video tape with another velocity as the nominal velocity so long as said counted numbers are not equal and transporting said video tape with the nominal velocity if said numbers are equal.
Claim 16
Independent Claim
154 words
A system for synchronizing the indicating pulses recorded in combination with the control signal on the control track of video tape with reference indicating pulses by means for controlling the velocity at which said video tape is transported by a means for transporting the video tape, comprising: A. a first counter for counting the number of periods or pulses of said control signal reproduced from said control track following each indicating pulse separated from the reproduced signal, B. a second counter for counting the number of periods or pulses of a reference control signal following each reference indicating pulse, C. a comparator for the counted numbers of periods or pulses for controlling saiD means for transporting said video tape and transporting said video tape with another velocity as the nominal velocity so long as said counted numbers are not equal and transporting said video tape with the nominal velocity if said numbers are equal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |