Interpolation filter with motion compensation
First Claim
1. An interpolation filter, comprisinginput means for receiving a video input signal to be interpolated;
- first filter means, coupled to said input means, for providing a frame interpolated video output signal tending to exhibit motion artifacts;
second filter means, coupled to said first filter means, for providing a line interpolated video output signal having picture elements spatially and temporally coincident with corresponding picture elements of said frame interpolated video output signal and having a vertical detail component suppressed by a given amount;
third filter means, coupled to said first filter means, for attenuating a vertical detail component of said frame interpolated video output signal to provide a further video output signal; and
output means for combining the video output signals of said first, second and third filter means for providing a frame interpolated video output signal in which said motion artifacts are attenuated.
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Accused Products
Abstract
A progressive scan receiver includes a frame interpolation filter for generating added lines for display in a given field from a video input signal by interpolation from corresponding elements of immediately preceding and following fields. A second filter provides a line interpolated signal having picture elements spatially and temporally coincident with corresponding elements of the frame interpolated signal and having a suppressed vertical detail component. A third filter attenuates the vertical detail component of the frame interpolated signal. An output circuit combines the signals of the three filters to provide a frame interpolated video output signal in which the vertical resolution of the video input signal is preserved and motion artifacts characteristic of frame interpolation are attenuated.
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Citations
20 Claims
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1. An interpolation filter, comprising
input means for receiving a video input signal to be interpolated; -
first filter means, coupled to said input means, for providing a frame interpolated video output signal tending to exhibit motion artifacts; second filter means, coupled to said first filter means, for providing a line interpolated video output signal having picture elements spatially and temporally coincident with corresponding picture elements of said frame interpolated video output signal and having a vertical detail component suppressed by a given amount; third filter means, coupled to said first filter means, for attenuating a vertical detail component of said frame interpolated video output signal to provide a further video output signal; and output means for combining the video output signals of said first, second and third filter means for providing a frame interpolated video output signal in which said motion artifacts are attenuated. - View Dependent Claims (2, 3, 4, 5)
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6. An interpolation filter, comprising:
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an input terminal for receiving a video input signal to be interpolated; frame comb filter means, coupled to said input terminal and responsive to said video input signal, for providing an interpolated video output signal in which picture elements of a given field are generated by interpolation of corresponding elements of immediately preceding and following fields; first line comb filter means, coupled to said frame comb filter means, for line comb filtering and delaying said video input signal by substantially one field to provide a first line comb filtered and delayed video output signal; second line comb filter means, coupled to said frame comb filter means, for line comb filtering said interpolated video output signal for providing a second line comb filtered output signal; and output means for combining said interpolated video output signal with said line comb filtered signals to provide an interpolated video output signal having reduced motion artifacts. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. In a progressive scan display system of the type including interpolation means responsive to a video input signal for providing a delayed video signal and an interpolated video signal to a speed-up means for time compressing said signals and interleaving the time compressed signals for display in progressive scan fashion on a display means, the improvement wherein said interpolator means comprises:
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frame comb filter means, responsive to said video input signal, for providing an interpolated video output signal in which picture elements of a given field are generated by interpolation of corresponding elements of immediately preceding and following fields; first line comb filter means, coupled to said frame comb filter means, for line comb filtering and delaying said video input signal by substantially one field to provide a first line comb filtered and delayed video output signal; second line comb filter means, of coupled to said frame comb filter means, for line comb filtering said interpolated video output signal for providing a second line comb filtered output signal; and output means for linearly combining said interpolated video output signal with said line comb filtered signals to provide an interpolated video output signal having reduced motion artifacts. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification