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US5534935A
Expired / Lapsed
US
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Processing apparatus for progressive scan generation of a television signal
Assignee: Toshiba Corp
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Filing: 1994-10-27
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Granted: 1996-07-09
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Expires: 2014-10-27
Abstract
Abstract A processing apparatus employs motion-adaptive processing to create a progressive scanning signal from an interlaced television scanning signal. The interlaced scanning signal is input to a field delay circuit and to a vertical highpass filter, the output of the field delay circuit is input to a field delay circuit and to a vertical lowpass filter, and the output of the field delay circuit is input to a vertical highpass filter. The outputs of the vertical highpass filters are added together at an adder. The output of the adder is added to the output of the vertical lowpass filter to create an interpolation signal. The interpolation signal and direct-type signal, being time-compressed, are coupled to a switch where they are alternately selected to obtain a progressive scanning signal with improved image quality, irrespective of whether the input signal represents a still or moving image.
Inventors
- 👤 Kiyoyuki Kawai
- 👤 Yoshihide Kimata
- 👤 Masayuki Ishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:39
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/01; H04N7/0135; H04N7/014; H04N7/0117; H04N7/012
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
116 words
A processing apparatus for converting a television scanning signal, comprising: vertical low-frequency component extracting means for extracting a vertical low-frequency component from a first field of an interlaced scanning signal; vertical high-frequency component extracting means for extracting a vertical high-frequency component from preceding and following fields of the first field of the interlaced scanning signal; interpolation signal generating means for generating an interpolation scanning signal by adding together the vertical low-frequency component and vertical high-frequency component; first means for time compressing the interlaced scanning signal; second means for time compressing the interpolation scanning signal; and selecting means for alternately selecting outputs of the first and second time compressing means and for providing a progressive scanning signal.
Claim 2
Dependent Claim
116 words
A processing apparatus for converting a television scanning signal, comprising: vertical low-frequency component extracting means for extracting a vertical low-frequency component from a first field of an interlaced scanning signal; vertical high-frequency component extracting means for extracting a vertical high-frequency component from preceding and following fields of the first field of the interlaced scanning signal; interpolation signal generating means for generating an interpolation scanning signal by adding together the vertical low-frequency component and vertical high-frequency component; first means for time compressing the interlaced scanning signal; second means for time compressing the interpolation scanning signal; and selecting means for alternately selecting outputs of the first and second time compressing means and for providing a progressive scanning signal.
Claim 3
Dependent Claim
45 words
The processing apparatus according to claim 1, wherein the vertical high-frequency component extracting means has a vertical highpass filter unit with an odd number of taps; and the vertical low-frequency component extracting means has a vertical lowpass filter unit with an even number of taps.
Claim 4
Dependent Claim
46 words
The processing apparatus according to claim 1, wherein the vertical high-frequency component extracting means includes vertical highpass filters having tap coefficients of -(1/16), (1/8) and -(1/16), respectively; and the vertical low-frequency component extracting means includes vertical lowpass filters having tap coefficients of (1/2) and (1/2), respectively.
Claim 5
Dependent Claim
48 words
The processing apparatus according to claim 1, wherein the vertical high-frequency component extracting means includes vertical highpass filters having tap coefficients of -(1/8), (1/4) and -(1/8), respectively; and the vertical low-frequency component extracting means includes vertical lowpass filters having tap coefficients of (1/12), (5/12), (5/12) and (1/12), respectively.
Claim 6
Dependent Claim
79 words
The processing apparatus according to claim 1, further comprising motion detecting means for detecting an image motion of the interlaced scanning signal and control means for controlling an amount of vertical high-frequency component output from the vertical high-frequency component means, in accordance with an image motion detection signal from the motion detecting means, these motion detecting means and control means being provided so as to control a gain of the vertical high-frequency component in accordance with an image motion.
Claim 7
Dependent Claim
125 words
A processing apparatus for converting a television scanning signal, comprising: vertical high-frequency component extracting means for extracting a vertical high-frequency component from an interlaced scanning signal; vertical low-frequency component extracting means for extracting a vertical low-frequency component from the interlaced scanning signal; field delay means for delaying by an amount corresponding to at least one field the interlaced scanning signal, and for providing a first field, a preceding field, and a following field of the interlaced scanning signal; and interpolation signal generating means for adding the vertical high-frequency components extracted from the preceding and following fields provided by the field delay means to the vertical low-frequency component extracted from the first field provided by the field delay means and for generating an interpolation scanning signal.
Claim 8
Dependent Claim
125 words
A processing apparatus for converting a television scanning signal, comprising: vertical high-frequency component extracting means for extracting a vertical high-frequency component from an interlaced scanning signal; vertical low-frequency component extracting means for extracting a vertical low-frequency component from the interlaced scanning signal; field delay means for delaying by an amount corresponding to at least one field the interlaced scanning signal, and for providing a first field, a preceding field, and a following field of the interlaced scanning signal; and interpolation signal generating means for adding the vertical high-frequency components extracted from the preceding and following fields provided by the field delay means to the vertical low-frequency component extracted from the first field provided by the field delay means and for generating an interpolation scanning signal.
References Cited (Backward Citations)
US4673978A
Cited
EP0266079A2
Cited
EP0447214A2
Cited
JPH043151A
Cited
US5204745A
Cited
US5365274A
Cited
US5402186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |