US3624281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Video recorder playback system for providing phased color television signals
Assignee: Data Memory Inc
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Filing: 1969-09-12
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Granted: 1971-11-30
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Expires: 1989-09-12
Abstract
Abstract A video recorder playback system for producing a phased color television signal, comprising: a demodulator and a chroma filter responsive to the recorded signal and operative to respectively separate therefrom chrominance signals and a luminance signal having synchronization pulses; a sync stripper for stripping the synchronization pulses from the luminance signal to provide a stripped luminance signal; a signal generator for developing a subcarrier signal and synchronization pulses from a single source; a modulator responsive to the chrominance signals and subcarrier signals and operative to develop modulated chrominance signals; and a signal adder responsive to the modulated chrominance signals, the stripped luminance signal, and the new synchronization pulses, and operative to develop the phase color television signal.
Inventors
- 👤 John T Phan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:54
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/79; H04N9/87; H04N9/8707; H04N5/00; H04N5/76; H04N5/91; H04N5/93; H04N5/932
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
119 words
A video recorder playback system for providing a phased color television signal, comprising: means responsive to a recorded video signal and operative to separate therefrom chrominance signals and a luminance signal including synchronization pulses; means for stripping the synchronization pulses from said luminance signal to provide a stripped luminance signal; signal-generating means including a single signal source having an output from which a new subcarrier signal and new synchronization pulses are developed; modulator means responsive to said chrominance signals and said new subcarrier signal and operative to develop modulated chrominance signals; and signal-adding means responsive to said modulated chrominance signals, said stripped luminance signal, and said new synchronization pulses and operative to develop therefrom said phased color television signal.
Claim 2
Dependent Claim
119 words
A video recorder playback system for providing a phased color television signal, comprising: means responsive to a recorded video signal and operative to separate therefrom chrominance signals and a luminance signal including synchronization pulses; means for stripping the synchronization pulses from said luminance signal to provide a stripped luminance signal; signal-generating means including a single signal source having an output from which a new subcarrier signal and new synchronization pulses are developed; modulator means responsive to said chrominance signals and said new subcarrier signal and operative to develop modulated chrominance signals; and signal-adding means responsive to said modulated chrominance signals, said stripped luminance signal, and said new synchronization pulses and operative to develop therefrom said phased color television signal.
Claim 3
Dependent Claim
56 words
A video recorder playback system as recited in claim 1 wherein said signal generating means also provides a color burst signal derived from the output of said single signal source, and said signal-adding means is also responsive to said color burst signal and operative to include said color burst signal in said phased color television signal.
Claim 4
Dependent Claim
35 words
A video recorder playback system as recited in claim 1 and further comprising delay means for delaying said new synchronization pulses for a predetermined period of time before they are coupled into said signal-adding means.
Claim 5
Dependent Claim
140 words
In a video recorder playback system including, means for demodulating a recorded color signal to provide chrominance signals, means for filtering the recorded color signal to provide a luminance signal including synchronization pulses, signal-generating means for developing a new subcarrier signal, means for modulating said new subcarrier signal with said chrominance signals to provide modulated chrominance signals, and signal-adding means for combining the modulated chrominance signals and the luminance signal, the improvement comprising: means for stripping the synchronization pulses from the luminance signal to provide a stripped luminance signal; said signal-generating means including a single signal source having an output from which said new subcarrier signal and new synchronization pulses are developed; and said adding means being operative to combine said new synchronization pulses, said stripped luminance signal, and said modulated chrominance signals to provide a phased color television signal.
Claim 6
Dependent Claim
140 words
In a video recorder playback system including, means for demodulating a recorded color signal to provide chrominance signals, means for filtering the recorded color signal to provide a luminance signal including synchronization pulses, signal-generating means for developing a new subcarrier signal, means for modulating said new subcarrier signal with said chrominance signals to provide modulated chrominance signals, and signal-adding means for combining the modulated chrominance signals and the luminance signal, the improvement comprising: means for stripping the synchronization pulses from the luminance signal to provide a stripped luminance signal; said signal-generating means including a single signal source having an output from which said new subcarrier signal and new synchronization pulses are developed; and said adding means being operative to combine said new synchronization pulses, said stripped luminance signal, and said modulated chrominance signals to provide a phased color television signal.
Claim 7
Dependent Claim
46 words
In a video recorder playback system as recited in claim 4 wherein a color burst signal is also developed from the output of said single signal source, and said color burst signal is coupled into said signal-adding means for inclusion in said phased color television signal.
Claim 8
Independent Claim
107 words
A method of producing a phased color television signal from the recorded signal developed by a video recorder, comprising: demodulating the recorded signal to provide chrominance signals; filtering the recorded signal to provide a luminance signal having synchronization pulses; stripping the synchronization pulses from said luminance signal to provide a stripped luminance signal; developing a new subcarrier signal and new synchronization pulses from the output of a single signal source; modulating said new subcarrier signal with said chrominance signals to provide modulated chrominance signals; and adding together said modulated chrominance signals, said stripped luminance signal, and said new synchronization pulses to form said phased color television signal.
Claim 9
Independent Claim
107 words
A method of producing a phased color television signal from the recorded signal developed by a video recorder, comprising: demodulating the recorded signal to provide chrominance signals; filtering the recorded signal to provide a luminance signal having synchronization pulses; stripping the synchronization pulses from said luminance signal to provide a stripped luminance signal; developing a new subcarrier signal and new synchronization pulses from the output of a single signal source; modulating said new subcarrier signal with said chrominance signals to provide modulated chrominance signals; and adding together said modulated chrominance signals, said stripped luminance signal, and said new synchronization pulses to form said phased color television signal.
Claim 10
Dependent Claim
61 words
A method of producing a phased color television signal As recited in claim 6 and further comprising the steps of developing a color burst signal from the output of said single signal source, and adding said color burst signal together with said modulated chrominance signals, said stripped luminance signal, and said new synchronization pulses to form said phased color television signal.
Claim 11
Dependent Claim
31 words
A method of producing a phased color television signal as recited in claim 6 wherein the time base stability of said recorded signal is better than + or - 50 nanoseconds.
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) | 1974-11-29 | 1975-05-31 | 1975-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-29 | 1979-05-31 | 1979-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-29 | 1983-05-31 | 1983-11-30 | $7700.00 | Window Closed / Lapsed |