US4670782A
Expired / Lapsed
US
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Television video pattern generator system
Assignee: MTL Systems Inc
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Filing: 1985-02-08
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Granted: 1987-06-02
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Expires: 2005-02-08
Abstract
Abstract A television video pattern generator system comprises a keyboard for entering pulse width and timing parameters for a video scanning rate. The individual incremental pulse width and timing parameters for the horizontal and vertical synchronizing waveforms are entered into a keyboard. A pattern selector selects a particular pattern which the operator wants to display on the video screen. The entered values are stored in a memory and a central processing unit processes the entered parameters and causes horizontal and vertical generators to generate the horizontal and vertical scan signals. A sync generator receives inputs from the horizontal and vertical generators and generates the scan rate. A pattern generator receives inputs from the sync generator and a pattern selector and generates a video display pattern in accordance with the selected pattern parameters and the selected scan rate parameters. If it is desired to compute a scan rate rather than to build a custom scan rate the central processing unit will automatically calculate a scan rate based upon enter parameters so that the individual pulse width of the scan rate pulses are expressed as a percentage of total horizontal line time.
Inventors
- 👤 John H. Harshbarger
- 👤 William M. Shores
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:24
CPC Classifications
H; H04; H04N; H04N17/00; H04N17/04
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
73 words
In a video test pattern generator, a selectable rate sync generator comprising: keyboard means for selecting individual independent raster scan signal pulse width and timing parameters for the horizontal and vertical synchronizing waveforms of a raster scan; and means coupled to said keyboard means for generating a time based raster scan signal by building up said scan signal from an integer number of individual constant time elements assembled according to said selected parameters.
Claim 2
Dependent Claim
73 words
In a video test pattern generator, a selectable rate sync generator comprising: keyboard means for selecting individual independent raster scan signal pulse width and timing parameters for the horizontal and vertical synchronizing waveforms of a raster scan; and means coupled to said keyboard means for generating a time based raster scan signal by building up said scan signal from an integer number of individual constant time elements assembled according to said selected parameters.
Claim 3
Dependent Claim
24 words
The sync generator of claim 1 including a fixed frequency clock coupled to said generating means for establishing the time base for said generator.
Claim 4
Dependent Claim
38 words
The sync generator of claim 1 including a variable frequency clock selectively coupled to said generator whereby said generator selectively generates a pixel based scan rate in accordance with pixel based pulse width parameters entered into said keyboard.
Claim 5
Dependent Claim
20 words
The sync generator according to claim 3 wherein said variable frequency clock is a voltage controlled phase locked loop oscillator.
Claim 6
Dependent Claim
31 words
The sync generator according to claim 1 including means for selectively generating a scan signal comprised of pulses whose widths are expressed as a percentage of selected total horizontal line time.
Claim 7
Dependent Claim
21 words
The sync generator according to claim 1 including display means coupled to said keyboard means ror displaying selected scan rate data.
Claim 8
Dependent Claim
119 words
A video pattern generator comprising: keyboard means for individually entering data values representing the incremental pulse width and timing parameters for all the scan rate pulses comprising a raster scan structure; sync generator means coupled to said keyboard means for generating a time based scan rate composed of an integer number of constant time elements assembled into pulse elements having said selected pulse widths and timing; fixed frequency clock means coupled to said sync generator means for controlling said sync generator means; raster pattern selecting means for selecting a desired raster pattern; and pattern generator means coupled to said sync generator means and said raster pattern selecting means for generating a selected raster pattern at the generated scan rate.
Claim 9
Dependent Claim
119 words
A video pattern generator comprising: keyboard means for individually entering data values representing the incremental pulse width and timing parameters for all the scan rate pulses comprising a raster scan structure; sync generator means coupled to said keyboard means for generating a time based scan rate composed of an integer number of constant time elements assembled into pulse elements having said selected pulse widths and timing; fixed frequency clock means coupled to said sync generator means for controlling said sync generator means; raster pattern selecting means for selecting a desired raster pattern; and pattern generator means coupled to said sync generator means and said raster pattern selecting means for generating a selected raster pattern at the generated scan rate.
Claim 10
Dependent Claim
37 words
The pattern generator according to claim 7 including a variable frequency clock coupled to said sync generator whereby said generator selectively generates a pixel based scan rate in accordance with pulse width parameters entered into said keyboard.
Claim 11
Dependent Claim
20 words
The pattern generator according to claim 8 wherein said variable frequency clock comprises a phase locked loop voltage controlled oscillator.
Claim 12
Dependent Claim
39 words
The video pattern generator according to claim 7 including means coupled to said microprocessor and sync generator for selectively automatically generating a scan format comprised of pulse elements whose widths are proportional to the selected total horizontal line time.
Claim 13
Dependent Claim
26 words
The video pattern generator according to claim 7 including memory storage means coupled to said central processing unit for storing a plurality of raster scan rates.
Claim 14
Dependent Claim
34 words
The video pattern generator according to claim 11 wherein said stored raster scan structures may be selectively edited by varying the widths of selected pulses in accordance with selective data entries into said keyboard.
Claim 15
Dependent Claim
26 words
The video pattern generator according to claim 12 wherein a code must be entered into said keyboard to enable editing of said stored raster scan structures.
Claim 16
Dependent Claim
22 words
The video pattern generator according to claim 7 including display means coupled to said keyboard means for displaying selective scan rate data.
Claim 17
Dependent Claim
116 words
A video test pattern generator comprising: a fixed frequency master clock; keyboard means for selecting scan rate elements by individually entering data values representing the pulse widths of the pulse elements comprising a raster scan; readout means coupled to said keyboard means for displaying selected scan rate data; selecting means for selecting a raster scan display pattern; sync generator means coupled to said keyboard means and said clock means for generating a time based scan rate comprised of a plurality of constant width time elements assembled into the selected pulse elements; and pattern generator means coupled to said sync generator means, and said selecting means for generating a selected test pattern at the generated scan rate.
Claim 18
Dependent Claim
116 words
A video test pattern generator comprising: a fixed frequency master clock; keyboard means for selecting scan rate elements by individually entering data values representing the pulse widths of the pulse elements comprising a raster scan; readout means coupled to said keyboard means for displaying selected scan rate data; selecting means for selecting a raster scan display pattern; sync generator means coupled to said keyboard means and said clock means for generating a time based scan rate comprised of a plurality of constant width time elements assembled into the selected pulse elements; and pattern generator means coupled to said sync generator means, and said selecting means for generating a selected test pattern at the generated scan rate.
Claim 19
Dependent Claim
40 words
The test pattern generator according to claim 15 including a variable frequency clock coupled to said sync generator whereby said generator selectively generates a pixel based scan rate in accordance with pixel based scan rate parameters entered into said keyboard.
Claim 20
Dependent Claim
28 words
The test pattern generator according to claim 16 wherein said variable frequency clock comprises a voltage controlled phase locked loop oscillator, said control voltage generated by said microprocessor.
Claim 21
Dependent Claim
38 words
The video test pattern generator according to claim 15 including means coupled to said microprocessor and sync generator for selectively generating a scan rate comprised of elements whose pulse widths are proportional to the total horizontal line time.
Claim 22
Dependent Claim
27 words
The video test pattern generator according to claim 15 including memory storage means coupled to said central processing unit for storing a plurality of raster scan rates.
Claim 23
Dependent Claim
26 words
The video test pattern generator according to claim 19 including means for editing said stored raster scan rates in accordance with data entered into said keyboard.
Claim 24
Dependent Claim
28 words
The video test pattern generator according to claim 19 wherein said stored raster scan rates may be edited upon the entry of an enablement code into said keyboard.
Claim 25
Dependent Claim
29 words
The video test pattern generator according to claim 15 wherein horizontal pulse widths are defined in 0.1 microsecond increments and vertical pulse widths are defined in 0.5 line increments.
Claim 26
Independent Claim
47 words
The method of generating a raster scan signal comprising: entering individual pulse width and timing parameters into a selecting means; storing said parameters in a memory; generating a scan signal by building a signal comprised of pulse elements having such selected individual pulse width and timing parameters.
Claim 27
Independent Claim
47 words
The method of generating a raster scan signal comprising: entering individual pulse width and timing parameters into a selecting means; storing said parameters in a memory; generating a scan signal by building a signal comprised of pulse elements having such selected individual pulse width and timing parameters.
Claim 28
Dependent Claim
122 words
In a video test pattern generator, a selectable rate sync generator comprising: synchronizing waveform generator means including a programmable microprocessor for generating a synchronizing waveform including horizontal and vertical drive pulses, horizontal and vertical blanking pulses, and horizontal and vertical sync pulses based on variable parameters set into said synchronizing waveform generator means, and keyboard controlled means for individually and independently selecting and setting into said synchronizing waveform generator means said variable parameters, wherein said variable parameters include at least horizontal drive time, vertical drive time, horizontal blanking time, vertical blanking time, horizontal front porch, horizontal sync time, vertical trigger phase and vertical trigger width, said keyboard controlled means including a single numeric keyboard means for selecting all of said variable parameters.
Claim 29
Dependent Claim
122 words
In a video test pattern generator, a selectable rate sync generator comprising: synchronizing waveform generator means including a programmable microprocessor for generating a synchronizing waveform including horizontal and vertical drive pulses, horizontal and vertical blanking pulses, and horizontal and vertical sync pulses based on variable parameters set into said synchronizing waveform generator means, and keyboard controlled means for individually and independently selecting and setting into said synchronizing waveform generator means said variable parameters, wherein said variable parameters include at least horizontal drive time, vertical drive time, horizontal blanking time, vertical blanking time, horizontal front porch, horizontal sync time, vertical trigger phase and vertical trigger width, said keyboard controlled means including a single numeric keyboard means for selecting all of said variable parameters.
References Cited (Backward Citations)
US3019289A
Cited
US3879749A
Cited
US3917902A
Cited
US4093960A
Cited
US4149178A
Cited
US4417275A
Cited
US4518995A
Cited
US4513318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |