US5216497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital convergence apparatus including an extrapolating circuit
Assignee: Panasonic Holdings Corp
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Filing: 1990-09-25
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Granted: 1993-06-01
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Expires: 2010-09-25
Abstract
Abstract A digital convergence apparatus detects the presence/absence, frequency and the number of scanning lines of inputted synchronizing signals, performs an interpolation between adjusting points corresponding to the detection signal to prepare a correction data, and performs a cursor display of a center position between adjusting points, extrapolating operation control and difference data storage, writing of the same data into n-planes, and time sharing of the interpolation processor so as to accommodate multimedia with a high accuracy.
Inventors
- 👤 Susumu Tsujihara
- 👤 Yasuaki Sakanishi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:02
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/16; H04N9/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A digital convergence apparatus comprising: an adjusting point generating means for generating a plurality of convergence adjusting points in horizontal and vertical directions on a screen of a color television receiver; a digital memory means for storing convergence correction data for said adjusting points; a cursor generating means for generating a cursor on said screen, including a means for generating a cursor indicating an adjusting point outside said screen at an adjusting point on said screen; a detecting means for detecting a presence/absence of a synchronizing signal inputted into said receiver, a frequency of said synchronizing signal and the number of scanning lines, and for generating a detection signal indicative of the detected presence/absence, frequency and number of scanning lines; and a correction data generated means for generating a convergence correction data from the convergence correction data stored in said digital memory means, including: an interpolating means for performing interpolation between adjacent adjusting points according to said detection signal; and an extrapolating means for determining a convergence correction data for each adjusting point outside said screen by extrapolating operation from convergence correction data for the adjusting points on said screen.
Claim 2
Dependent Claim
190 words
A digital convergence apparatus comprising: an adjusting point generating means for generating a plurality of convergence adjusting points in horizontal and vertical directions on a screen of a color television receiver; a digital memory means for storing convergence correction data for said adjusting points; a cursor generating means for generating a cursor on said screen, including a means for generating a cursor indicating an adjusting point outside said screen at an adjusting point on said screen; a detecting means for detecting a presence/absence of a synchronizing signal inputted into said receiver, a frequency of said synchronizing signal and the number of scanning lines, and for generating a detection signal indicative of the detected presence/absence, frequency and number of scanning lines; and a correction data generated means for generating a convergence correction data from the convergence correction data stored in said digital memory means, including: an interpolating means for performing interpolation between adjacent adjusting points according to said detection signal; and an extrapolating means for determining a convergence correction data for each adjusting point outside said screen by extrapolating operation from convergence correction data for the adjusting points on said screen.
Claim 3
Dependent Claim
65 words
A digital convergence apparatus as described in claim 1, wherein said extrapolated means extrapolates convergence correction data for two adjacent adjusting points on said screen to obtain a convergence correction data for an adjusting point outside said screen, and said means for generating a cursor for an adjusting point outside said screen generates two cursors at said two adjacent adjusting points on said screen, respectively.
Claim 4
Dependent Claim
58 words
A digital convergence apparatus as described in claim 1, wherein said interpolating means comprises a vertical interpolating means for performing an interpolating operation in a vertical direction according to a detected number of scanning lines, and a horizontal interpolating means for performing an interpolating operation in a horizontal direction according to a detected frequency of the synchronizing signal.
Claim 5
Dependent Claim
31 words
A digital convergence apparatus as described in claim 3, wherein said horizontal interpolating means comprises a low-pass filter whose cut-off frequency is controlled by the detected frequency of the synchronizing signal.
Claim 6
Dependent Claim
33 words
A digital convergence apparatus as described in claim 1, wherein said interpolating means is responsive to a detection signal indicating an absence of the synchronizing signal for generating predetermined specific convergence corrections data.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |