Motion vector processing in digital television images
First Claim
Patent Images
1. A television standards converter comprising:
- means for analyzing motion between consecutive fields of an input televisions signal of one television standard and for deriving motion vectors in dependence on said motion;
means for recursively filtering said motion vectors;
means for aligning said fields in dependence on the filtered motion vectors so as to effectively represent static pictures; and
means for effecting conversion using said static pictures to derive an output televeision signal of a different television standard.
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Abstract
A television standards converter comprises a motion analyzer for analyzing the motion between consecutive fields of an input television signal of one television standard and for deriving motion vectors in dependence on the motion, a filter for recursively filtering the motion vectors, and an interpolator for aligning the fields in dependence on the filtered motion vectors so as effectively to represent static pictures, and means to effect conversion using the static pictures to derive the required output television signal of a different television standard.
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Citations
15 Claims
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1. A television standards converter comprising:
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means for analyzing motion between consecutive fields of an input televisions signal of one television standard and for deriving motion vectors in dependence on said motion; means for recursively filtering said motion vectors; means for aligning said fields in dependence on the filtered motion vectors so as to effectively represent static pictures; and means for effecting conversion using said static pictures to derive an output televeision signal of a different television standard. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A 625-line 50-fields per second to 525-line 60-fields per second television standards converter comprising:
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a first time base corrector for receiving an input 625-line 50-fields per second digital television signal; a motion analyzer connected to the output of said first time base corrector for analyzing motion in said input television signal and for deriving motion vectors in dependence on said motion; means for recursively filtering said motion vectors; a shift register also connected to the output of said first time base corrector; an interpolator for deriving samples of an output 525-line 60-fields per second digital television signal in dependence on samples derived from said shift register and the filtered motion vectors; and
a second time base corrector for assembling said derived samples to form said output television signal. - View Dependent Claims (8, 9)
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10. A 525-line 60-fields per second to 625-line 50 fields per second television standards converter comprising:
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a first time base corrector for receiving an input 525-line 60-fields per second digital television signal; a motion analyzer connected to the output of said first time base corrector for analyzing motion in said input television signal and for deriving motion vectors in dependence on said motion vectors; means for recursively filtering said motion vectors; a shift register also connected to the output of said first time base corrector; an interpolator for deriving samples of an output 625-line 50-fields per second digital television signal in dependence on samples derived from said shift register and the filtered motion vectors; and
a second time base corrector for assembling the derived samples to form said output television signal. - View Dependent Claims (11, 12)
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13. A slow motion processor comprising:
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an input circuit for receiving an input digital television signal; a motion analyzer for analyzing motion in said input digital television signal and for deriving motion vectors in dependence on said motion; means for recursively filtering said motion vectors; a shift register for holding successive different fields of said input television signal; an interpolator for deriving samples of a slow motion output digital television signal in dependence on the degree of slow motion, samples derived from said shift register, and the filtered motion vectors; and a 2-field time base corrector for assembling said derived samples to form said slow motion output television signal. - View Dependent Claims (14, 15)
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Specification