Movement detector for use in television signal processing
AssigneeIndependent Broadcasting Authority
InventorsGary J. Tonge, Barry A. Flannigan
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Abstract
A movement detector for detecting movement in a television picture comprises a local movement detector which produces an output signal as a result of comparing similar input signals from different fields and the detector output signal is processed in a field store processor which spreads the output signal in space and in time. The processor comprises a recursive loop, a field delay element and a look-up table, with the latter receiving as inputs the output from the recursive loop and the instantaneous input to the processor to produce a control signal output. A line interlace to non-interlace transformation circuit including such a movement detector is also disclosed.
Claims6
Television signal processing apparatus comprising delay circuitry for receiving a series of input signals and including means for producing a series of output signals representing input signals delayed by a plurality of lines and a plurality of fields, movement detection means responsive to said series of output signals for producing from signals which are a frame apart a series of movement detection signals, first processing circuitry responsive to the detection signals from the movement detection means for modifying a present detection signal by a further signal which is a function of a previous detection signal for producing a control signal, and further processing means responsive to the control signal and connected to the delay circuitry to receive outputs therefrom for producing a processed television signal in the presence of movement as determined by said control signal.
Dependencies are inferred from the claim text.