Patent ID: 6040869
Filing Date: 2000-03-21
Classification: H04N

Abstract:
An interlace-scan to progressive-scan video signal conversion system comprising:a terminal for receiving the interlace-scan video signal;a first delay element, coupled to the terminal for delaying the interlace-scan video signal by a number, N, of horizontal line intervals to produce a first delayed video signal, wherein N horizontal line intervals is less than one field period but N+1 horizontal line intervals is greater than one field period;a second delay element, coupled to the first delay element for delaying the first delayed video signal by one horizontal line interval to produce a second delayed video signal;a first interpolator which combines the received interlace-scan video signal with the first delayed video signal to produce a first interpolated signal;a second interpolator which combines the received interlace-scan video signal with the second delayed video signal to produce a second interpolated signal;a first speed-up memory coupled to the first interpolator to receive samples of the first interpolated signal at a first sample rate and to provide the samples of the first interpolated signal, as an output signal, at a second sample rate which is twice the first sample rate;a second speed-up memory coupled to the second interpolator to receive samples of the second interpolated signal at the first sample rate and to provide the samples of the second interpolated signal, as an output signal, at the second sample rate; anda multiplexer, coupled to the first and second speedup memories, to alternately provide the output signals of the first and second speedup memories as a progressive-scan video signal.