US4191965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for testing color sequencing of secam color television signals
Assignee: Tektronix Inc
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Filing: 1978-07-11
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Granted: 1980-03-04
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Expires: 1998-07-11
Abstract
Abstract An apparatus and method for testing color sequencing of SECAM color television signals whereby any reversed color sequences will be immediately identifiable is provided. Specifically, the color sequence of SECAM picture monitor determined by white lead-in during the back porch interval or by Line Identification Signals during the vertical blanking interval is compared to a reference which can be internally derived and/or derived from another picture monitor or generator. If a difference is obtained, means are provided for visually or audibly indicating the color sequence error.
Inventors
- 👤 Larry A. Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:46
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/44; H04N9/47
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
84 words
The method of testing color sequencing of multiple color television signals, which comprises: providing first signals representative of the sequence of the color television signals to be tested; providing second signals representative of the sequence of a reference color television signal; comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, said third signal providing immediate identification of said difference.
Claim 2
Independent Claim
84 words
The method of testing color sequencing of multiple color television signals, which comprises: providing first signals representative of the sequence of the color television signals to be tested; providing second signals representative of the sequence of a reference color television signal; comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, said third signal providing immediate identification of said difference.
Claim 3
Independent Claim
86 words
An apparatus for testing color sequencing of color television signals, comprising: means for providing first signals representative of the sequence of the color television signals to be tested; means for providing second signals representative of the sequence of a reference color television signal; and means for comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, providing immediate identification of said difference.
Claim 4
Independent Claim
86 words
An apparatus for testing color sequencing of color television signals, comprising: means for providing first signals representative of the sequence of the color television signals to be tested; means for providing second signals representative of the sequence of a reference color television signal; and means for comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, providing immediate identification of said difference.
Claim 5
Dependent Claim
18 words
The apparatus according to claim 2 further comprising means responsive to said third signal for indicating said difference.
Claim 6
Dependent Claim
18 words
The apparatus according to claim 3 wherein said means responsive defines a visual means for providing the indication.
Claim 7
Dependent Claim
18 words
The apparatus according to claim 3 wherein said means responsive defines an audible means for providing the indication.
Claim 8
Independent Claim
92 words
An apparatus for sequence testing information contained in the field blanking interval and derived from information contained in the white reference within a single SECAM television signal, the apparatus comprising: means for comparing an applied signal representative of the sequence of information contained in the field blanking information and derived from the white reference of the SECAM television signal against a reference for providing an output when said applied signal exceeds the level of said reference; and means responsive to said output during the field blanking interval for providing continuous sequence confirmation.
Claim 9
Independent Claim
92 words
An apparatus for sequence testing information contained in the field blanking interval and derived from information contained in the white reference within a single SECAM television signal, the apparatus comprising: means for comparing an applied signal representative of the sequence of information contained in the field blanking information and derived from the white reference of the SECAM television signal against a reference for providing an output when said applied signal exceeds the level of said reference; and means responsive to said output during the field blanking interval for providing continuous sequence confirmation.
Claim 10
Dependent Claim
22 words
The apparatus according to claim 6 further comprising means responsive to said continuous sequence confirmation for providing a visually observable indication thereof.
Claim 11
Dependent Claim
21 words
The apparatus according to claim 6 further comprising means responsive to the continuous sequence confirmation for providing an audible indication thereof.
Claim 12
Independent Claim
161 words
An apparatus for testing color sequencing of color television signals, the apparatus comprising: means for providing first signals representative of the sequence of the color television signals to be tested; means for providing second signals representative of the sequence of a reference color television signal; means for comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, providing immediate identification of said difference; means for comparing an applied signal representative of the sequence information contained in the field blanking information and derived from the white reference of the color television signal for providing an output when said applied signal exceeds the level of said reference; means responsive to said output during the field blanking interval for providing continuous sequence confirmation; and indicating means responsive to said third signal for indicating said difference and said continuous sequence confirmation.
Claim 13
Independent Claim
161 words
An apparatus for testing color sequencing of color television signals, the apparatus comprising: means for providing first signals representative of the sequence of the color television signals to be tested; means for providing second signals representative of the sequence of a reference color television signal; means for comparing said first and said second signals to obtain a third signal if the sequence of the color television signals to be tested is different from the sequence of said reference color television signal, providing immediate identification of said difference; means for comparing an applied signal representative of the sequence information contained in the field blanking information and derived from the white reference of the color television signal for providing an output when said applied signal exceeds the level of said reference; means responsive to said output during the field blanking interval for providing continuous sequence confirmation; and indicating means responsive to said third signal for indicating said difference and said continuous sequence confirmation.
Claim 14
Dependent Claim
15 words
The apparatus according to claim 9, wherein said indicating means provides a visually observable indication.
Claim 15
Dependent Claim
14 words
The apparatus according to claim 9, wherein said indicating means provides an audible indication.
References Cited (Backward Citations)
US3267208A
Cited
US3567862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-03-04 | 1983-09-03 | 1984-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-03-04 | 1987-09-03 | 1988-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-03-04 | 1991-09-03 | 1992-03-04 | $7700.00 | Window Closed / Lapsed |