Patent US3602646A successfully refreshed from Google Patents.
US3602646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Character contour edger
Assignee: CBS Broadcasting Inc
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Filing: 1969-02-10
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Granted: 1971-08-31
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Expires: 1989-02-10
Abstract
Abstract As described herein, electronically generated alphanumeric character waveforms are supplied to an image enhancer circuit which reproduces the waveforms together with detail signals occurring at the leading and trailing edges of the reproduced waveforms. The reproduced waveforms and the detail signals are aligned in time and thereafter supplied to a pair of keying circuits, respectively, which in response to the reproduced waveforms and the detail signals, supply predetermined potentials to a television channel with the result that the letter waveforms will be reproduced with predetermined color contours.
Inventors
- 👤 Abraham A Goldberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:58
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/64; H04N9/74; H04N9/76; H04N5/00; H04N5/222; H04N5/262; H04N5/2622
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
135 words
Apparatus for supplying to a television channel title information signals reproducible as title information with predetermined contour enhancement completely surrounding each character in the title comprising: an image enhancer adapted to respond to title information signals for producing reproductions thereof together with detail signals comprising pulses which occur at times that are a function of the leading, trailing, top, and bottom edges of each reproduced signal; adjustable delay means for receiving said reproductions and for producing delayed reproductions which are aligned in time with said pulses; first keyer means responsive to said pulses for supplying a first predetermined signal to the television channel during the duration of each pulse; and second keyer means responsive to said delayed reproductions for supplying a second predetermined signal to the television channel during the duration of each delayed reproduction.
Claim 2
Dependent Claim
135 words
Apparatus for supplying to a television channel title information signals reproducible as title information with predetermined contour enhancement completely surrounding each character in the title comprising: an image enhancer adapted to respond to title information signals for producing reproductions thereof together with detail signals comprising pulses which occur at times that are a function of the leading, trailing, top, and bottom edges of each reproduced signal; adjustable delay means for receiving said reproductions and for producing delayed reproductions which are aligned in time with said pulses; first keyer means responsive to said pulses for supplying a first predetermined signal to the television channel during the duration of each pulse; and second keyer means responsive to said delayed reproductions for supplying a second predetermined signal to the television channel during the duration of each delayed reproduction.
Claim 3
Dependent Claim
42 words
Apparatus as defined by claim 1 wherein programmed television signals are supplied to the television channel and wherein the signals supplied to the channel by said first and second keyer means effectively blank out said television program signals during the operation thereof.
Claim 4
Dependent Claim
73 words
Apparatus as defined by claim 2 wherein the first keyer means comprises means for supplying alternately a color subcarrier signal having a variable phase and amplitude or a predetermined and variable potential to said television channel and the second keyer means comprises means for supplying alternately a predetermined and variable potential or a color subcarrier signal having a variable phase and amplitude to said television channel during the duration of each delayed reproduction.
Claim 5
Dependent Claim
37 words
Apparatus as defined by claim 3 further comprising amplifier means in said television channel having an input terminal coupled to one of the keyer means and an output terminal coupled to the other of said keyer means.
Claim 6
Dependent Claim
28 words
Apparatus as defined by claim 4 further comprising restorer circuit means responsive to the programmed television signals for inserting the appropriate black level into said programmed television signals.
Claim 7
Dependent Claim
17 words
Apparatus as defined by claim 5 further comprising means for inverting the phase of said detail signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |