US4947250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noise reduction apparatus for a widescreen video signal processing system
Assignee: General Electric Co
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Filing: 1989-09-07
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Granted: 1990-08-07
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Expires: 2009-09-07
Abstract
Abstract In a system for processing a widescreen television signal containing center and side panel components, low frequency side panel information is time compressed before being disposed in a horizontal image overscan region. The compressed side panel low frequency information is frequency modulated onto an FM subcarrier to improve the noise characteristics of the compressed side panel information when transmitted over a noisy channel.
Inventors
- 👤 John G. N. Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:18
CPC Classifications
H; H04; H04N; H04N11/00; H04N11/24; H04N11/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 words
Video signal encoding apparatus comprising: means for providing a television type signal representative of a widescreen image having side panel information, main panel information and an image aspect ratio greater than that of a standard television image; and means for frequency modulating an auxiliary subcarrier with said side panel information.
Claim 2
Dependent Claim
50 words
Video signal encoding apparatus comprising: means for providing a television type signal representative of a widescreen image having side panel information, main panel information and an image aspect ratio greater than that of a standard television image; and means for frequency modulating an auxiliary subcarrier with said side panel information.
Claim 3
Dependent Claim
24 words
Apparatus according on claim 1, wherein said modulating side panel information is low frequency side panel information exclusive of high frequency side panel information.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 1 and further comprising: means for time compressing said side panel information prior to modulating said auxiliary subcarrier.
Claim 5
Dependent Claim
72 words
Apparatus for decoding an encoded widescreen video signal representative of a widescreen image having an image aspect ratio greater than a standard aspect ratio, a side panel component and a main panel component, said side panel component frequency modulating an auxiliary subcarrier, said apparatus comprising: means for frequency demodulating said auxiliary subcarrier to recover said side panel component; and means for combining said recovered side panel component with said main panel component.
Claim 6
Dependent Claim
72 words
Apparatus for decoding an encoded widescreen video signal representative of a widescreen image having an image aspect ratio greater than a standard aspect ratio, a side panel component and a main panel component, said side panel component frequency modulating an auxiliary subcarrier, said apparatus comprising: means for frequency demodulating said auxiliary subcarrier to recover said side panel component; and means for combining said recovered side panel component with said main panel component.
Claim 7
Dependent Claim
30 words
Apparatus according to claim 4 and further comprising: means for time expanding said recovered side panel component prior to combining said recovered side panel component with said main panel component.
Claim 8
Dependent Claim
27 words
Apparatus according to claim 4, wherein said side panel component modulating said auxiliary subcarrier contains low frequency side panel information exclusive of high frequency side panel information.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 6, wherein said modulating side panel component is a luminance side panel 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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |