US4316219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronizing circuit adaptable for various TV standards
Assignee: RCA Corp
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Filing: 1980-07-17
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Granted: 1982-02-16
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Expires: 2000-07-17
Abstract
Abstract A sync generator uses ROMs addressed by counters to synthesize various television sync waveforms. The ROMs can be changed or reprogrammed to generate sync signals for different standards. By dividing the sync signals into four intervals which are selected by paging signals from one counter, a reduction in required ROM capacity is achieved.
Inventors
- 👤 Terrence R. Smith
- 👤 Frank J. Marlowe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:04
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/06; H04N5/067
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
70 words
A television synchronizing signal generator comprising: memory means for storing information relating to the magnitude of at least one component of a composite synchronizing signal at each of a predetermined plurality of sampling points in each television frame; and clock signal generating means coupled to said memory means for generating periodic sampling signals for recurrently addressing said memory means for reading said information from said memory for generating said component.
Claim 2
Dependent Claim
70 words
A television synchronizing signal generator comprising: memory means for storing information relating to the magnitude of at least one component of a composite synchronizing signal at each of a predetermined plurality of sampling points in each television frame; and clock signal generating means coupled to said memory means for generating periodic sampling signals for recurrently addressing said memory means for reading said information from said memory for generating said component.
Claim 3
Dependent Claim
16 words
A television synchronizing signal generator according to claim 1 wherein said component comprises horizontal synchronizing information.
Claim 4
Dependent Claim
16 words
A television synchronizing signal generator according to claim 1 wherein said component comprises vertical synchronizing information.
Claim 5
Dependent Claim
15 words
A television synchronizing signal generator according to claim 1 wherein said component comprises blanking information.
Claim 6
Dependent Claim
25 words
A television synchronization generator according to claim 1 wherein said composite synchronization signal comprises composite horizontal and vertical synchronization signals and composite blanking signal components.
Claim 7
Dependent Claim
35 words
A television synchronization generator according to claim 1 wherein said memory means comprises horizontal and vertical memories, and said generating means comprises cascaded horizontal and vertical counters coupled to said horizontal and vertical memories respectively.
Claim 8
Dependent Claim
23 words
A television synchronization signal generator according to claim 6 further comprising horizontal and vertical latches coupled to said horizontal and vertical memories respectively.
Claim 9
Dependent Claim
25 words
A television synchronization signal generator according to claim 6 wherein said horizontal and vertical memories provide reset signals to said horizontal and vertical counters respectively.
Claim 10
Dependent Claim
24 words
A television synchronization signal generator according to claim 6 wherein said vertical memory provides at least one page address signal to said horizontal memory.
Claim 11
Dependent Claim
30 words
A television synchronization generator according to claim 9 wherein said page address signal is two in number whereby four types of time intervals can be determined within said horizontal memory.
Claim 12
Dependent Claim
30 words
A television synchronization generator according to claim 6 further comprising a further counter coupled to between the output of said horizontal counter and said horizontal memory to determine half-line intervals.
Claim 13
Dependent Claim
76 words
A television apparatus adapted for ready conversion among various television standards comprising: memory means for storing information relating to the magnitude of at least one component of a composite synchronizing signal at each of a predetermined plurality of sampling points in each television frame; and clock signal generating means coupled to said memory means for generating periodic sampling signals for recurrently addressing said memory means for reading said information from said memory for generating said component.
Claim 14
Dependent Claim
76 words
A television apparatus adapted for ready conversion among various television standards comprising: memory means for storing information relating to the magnitude of at least one component of a composite synchronizing signal at each of a predetermined plurality of sampling points in each television frame; and clock signal generating means coupled to said memory means for generating periodic sampling signals for recurrently addressing said memory means for reading said information from said memory for generating said component.
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) | 1985-02-15 | 1985-08-17 | 1986-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-15 | 1989-08-17 | 1990-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-15 | 1993-08-17 | 1994-02-16 | $7700.00 | Window Closed / Lapsed |