-
公开(公告)号：FR2584553A1
公开(公告)日：1987-01-09
申请号：FR8609626
申请日：1986-07-02
Applicant: RCA CORP
Inventor： LU CHUNG HSIN , ACAMPORA ALFONSE
Abstract: In field/frame recursive filters for providing noise reduction to composite video signal, inversion of the chrominance component of the composite video signal is obviated by selecting nearest neighbor in-phase field/frame delayed signals for recursion. The system arbitrates between two or more nearest neighbor in-phase signals or combinations thereof and feeds back the signal having an amplitude most closely matching the incoming composite video signal.
-
公开(公告)号：CA1206596A
公开(公告)日：1986-06-24
申请号：CA440862
申请日：1983-11-09
Applicant: RCA CORP
Inventor： BUNTING RICHARD M , ACAMPORA ALFONSE
Abstract: Frame-to-frame comb filter for separating chrominance and luminance components of composite video signals produce distortions around the periphery of reproduced moving images. The color distortions are corrected by selectively adding the combed luminance signal to the combed chrominance signal during periods of detected motion, and bandpass filtering the combined signal to pass only the chrominance spectrum.
-
公开(公告)号：GB2110496B
公开(公告)日：1985-10-23
申请号：GB8230798
申请日：1982-10-28
Applicant: RCA CORP
Inventor： ACAMPORA ALFONSE
Abstract: A digital finite impulse response (FIR) filter is provided in which a plurality of weighted signal taps are symmetrically located in time about a weighted center tap. Weighted signals from the symmetrically located taps are summed at a first point in the filter, which sum is then combined with signals from the center tap in one sense, that is, either additively or subtractively, to produce signals at a first output. The summed signals at the first point are also combined with signals from the center tap in an opposite sense to produce signals at a second output. The two outputs will exhibit bandpass and lowpass filter response characteristics, with the outputs at which the respective responses are produced being determined by the respective senses of signal combination. The FIR filter may be of either the input tap-weighted or output tap-weighted variety.
-
公开(公告)号：CA1177175A
公开(公告)日：1984-10-30
申请号：CA407895
申请日：1982-07-23
Applicant: RCA CORP
Inventor： ACAMPORA ALFONSE
Abstract: RCA 76,854 A digital filter is provided which selectively employs straight binary arithmetic and offset two's complement arithmetic in an adder ladder to protect against signal overflows and underflows, as well as to minimize adder size. Signal overflows and underflows are prevented by performing subtraction and certain additions in offset two's complement notation, while adder sizes are minimized by performing certain other additions in binary notation. In an alternate embodiment, positively weighted values are combined by binary addition in a first adder ladder, and negatively weighted values are combined by binary addition in a second, parallel adder ladder. At the outputs of the two ladders, the two sums are converted to offset two's complement notation, and the negatively weighted sum is subtracted from the positively weighted sum.
-
公开(公告)号：CA1173916A
公开(公告)日：1984-09-04
申请号：CA414902
申请日：1982-11-04
Applicant: RCA CORP
Inventor： ACAMPORA ALFONSE
Abstract: RCA 77,211 A digital filter is provided which produces two output signals exhibiting different output characteristics in response to an input signal. The digital filter includes delaying means comprising a shift register having a plurality of signal taps and a given time delay between its input and output. The delaying means also produces the input signal delayed by at least half the time delay of the shift register. The filter also includes signal coupling means, coupled to the taps of the shift register, for weighting signals passing through it. Circuitry is provided for producing a sum of tap-weighted signals, and is coupled to the signal coupling means and cooperates with the shift register. Two combining means are also included. The first produces a combination in one sense of the tap-weighted signal sum and the delayed input signal at one output. The other produces a combination in the other sense of the tap-weighted signal sum and the delayed input signal at the other output.
-
Patent Agency Ranking
公开(公告)号：GB2130840A
公开(公告)日：1984-06-06
申请号：GB8331141
申请日：1983-11-22
Applicant: RCA CORP
Inventor： PRITCHARD DALTON HAROLD , BUNTING RICHARD MICHAEL , ACAMPORA ALFONSE
Abstract: A frame-to-frame comb filter for separating chrominance (C) Fig. 2(d) and luminance (Y) (c) signals from composite video signals (a), (b) produces objectionable distortions around the edges of moving objects. The distortions are substantially removed by low pass filtering (27) the combed chrominance signal and combining (31) the low pass filtered chrominance signal (e) with the combined luminance signal (c). Color distortions may also be removed by selectively adding the combed luminance signal to the combed chrominance signal during periods of detected motion.
-
公开(公告)号：FR2536941A1
公开(公告)日：1984-06-01
申请号：FR8318861
申请日：1983-11-25
Applicant: RCA CORP
Inventor： PRITCHARD DALTON HAROLD , BUNTING RICHARD MICHAEL , ACAMPORA ALFONSE
-
公开(公告)号：DD206871A5
公开(公告)日：1984-02-08
申请号：DD24467482
申请日：1982-11-08
Applicant: RCA CORP
Inventor： ACAMPORA ALFONSE
Abstract: A digital finite impulse response (FIR) filter is provided in which a plurality of weighted signal taps are symmetrically located in time about a weighted center tap. Weighted signals from the symmetrically located taps are summed at a first point in the filter, which sum is then combined with signals from the center tap in one sense, that is, either additively or subtractively, to produce signals at a first output. The summed signals at the first point are also combined with signals from the center tap in an opposite sense to produce signals at a second output. The two outputs will exhibit bandpass and lowpass filter response characteristics, with the outputs at which the respective responses are produced being determined by the respective senses of signal combination. The FIR filter may be of either the input tap-weighted or output tap-weighted variety.
-
公开(公告)号：FR2516322A1
公开(公告)日：1983-05-13
申请号：FR8218610
申请日：1982-11-05
Applicant: RCA CORP
Inventor： ACAMPORA ALFONSE
Abstract: A digital finite impulse response (FIR) filter is provided in which a plurality of weighted signal taps are symmetrically located in time about a weighted center tap. Weighted signals from the symmetrically located taps are summed at a first point in the filter, which sum is then combined with signals from the center tap in one sense, that is, either additively or subtractively, to produce signals at a first output. The summed signals at the first point are also combined with signals from the center tap in an opposite sense to produce signals at a second output. The two outputs will exhibit bandpass and lowpass filter response characteristics, with the outputs at which the respective responses are produced being determined by the respective senses of signal combination. The FIR filter may be of either the input tap-weighted or output tap-weighted variety.
-
公开(公告)号：GB2177872B
公开(公告)日：1989-09-20
申请号：GB8615923
申请日：1986-06-30
Applicant: RCA CORP , RCA LICENSING CORP
Inventor： LU CHUNG HSIN , ACAMPORA ALFONSE
Abstract: In field/frame recursive filters for providing noise reduction to composite video signal, inversion of the chrominance component of the composite video signal is obviated by selecting nearest neighbor in-phase field/frame delayed signals for recursion. The system arbitrates between two or more nearest neighbor in-phase signals or combinations thereof and feeds back the signal having an amplitude most closely matching the incoming composite video signal.
-
-
-
-
-
-
-
-
-
Search Results
52
records
(took 0.02 seconds)
