Apparatus for reducing flickers of encoder when digitally converting video signals from non-interlaced to interlaced format
First Claim
1. An apparatus for reducing flickers of an encoder, comprising:
- graphic control means for outputting pixel data corresponding to an analog output from a line scanning unit, and for outputting a pixel clock signal, a horizontal synchronous signal and a vertical synchronous signal;
synchronous signal covering means for converting a pixel clock signal, a non-interlaced horizontal synchronous signal and non-interlaced vertical synchronous signal outputted from the graphic control means to a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of an interlace scanning method;
control signal generating means for outputting a control signal by receiving a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of a interlace scanning method outputted from the synchronous signal converting means;
line store means for selecting pixel data corresponding to nth even scanning line of the pixel data from the graphic control means and for writing/reading the selected pixel data in accordance with a control signal of the control signal generating means;
multiplexing means for selecting and outputting a pixel data pair corresponding to adjacent scanning lines stored in the line store means;
digital addition means for adding pixels from a pixel data pair from the multiplexer;
shift means for computing average value of pixel data at a scanning line adjacent thereto by receiving an output signal of the digital addition means;
encoding means for encoding a signal outputted from the shift means; and
oscillating means for transmitting clocking signals to the control signal generator and the shifting unit.
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Accused Products
Abstract
An improved apparatus for reducing flickers of an encoder capable of advantageously reducing flickers occurred when video signals are converted from a non-interlace scanning method to an interlace scanning method in the digital method, which includes a graphic controller for outputting a pixel signal by a line unit and for outputting a pixel clock, a horizontal synchronous signal and a vertical synchronous signal; a synchronous signal converter for converting a pixel clock, a horizontal synchronous signal and a vertical synchronous signal outputted from the graphic controller to a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of an interlace scanning method; a control signal generator for outputting a control signal by receiving a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of an interlace scanning method outputted from the synchronous signal converter; a line store unit for selecting a pixel data corresponding to nth even scanning line among the output signals of the graphic controller and for writing/reading the selected pixel data in accordance with a control signal of the control signal generator; a multiplexer for selecting and outputting a pixel data of a scanning line adjacent thereto among the output signals of the line store unit; a digital added for adding a pixel data of a scanning line adjacent thereto outputted from the multiplexer; a shifting unit for computing average value of pixel data at a scanning line adjacent thereto by receiving an output signal of the digital adder; an encoder for encoding a signal outputted from the shifting unit; and an oscillator for transmitting clocks to the control signal generator and the shifting unit.
22 Citations
8 Claims
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1. An apparatus for reducing flickers of an encoder, comprising:
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graphic control means for outputting pixel data corresponding to an analog output from a line scanning unit, and for outputting a pixel clock signal, a horizontal synchronous signal and a vertical synchronous signal; synchronous signal covering means for converting a pixel clock signal, a non-interlaced horizontal synchronous signal and non-interlaced vertical synchronous signal outputted from the graphic control means to a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of an interlace scanning method; control signal generating means for outputting a control signal by receiving a pixel clock, a horizontal synchronous signal and a vertical synchronous signal of a interlace scanning method outputted from the synchronous signal converting means; line store means for selecting pixel data corresponding to nth even scanning line of the pixel data from the graphic control means and for writing/reading the selected pixel data in accordance with a control signal of the control signal generating means; multiplexing means for selecting and outputting a pixel data pair corresponding to adjacent scanning lines stored in the line store means; digital addition means for adding pixels from a pixel data pair from the multiplexer; shift means for computing average value of pixel data at a scanning line adjacent thereto by receiving an output signal of the digital addition means; encoding means for encoding a signal outputted from the shift means; and oscillating means for transmitting clocking signals to the control signal generator and the shifting unit. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for digitally reducing flicker associated with an encoder that converts non-interlaced video signals to interlaced video signals, the apparatus receiving interlaced pixel data output from a line scanner and non-interlaced timing signals associated therewith, the apparatus comprising:
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input means for receiving the interlaced pixel data; timing means for converting non-interlaced timing signals to interlaced timing signals; a memory, operatively connected to the input means and the timing means, for storing pixel data; a multiplexer, operatively connected to the memory and the timing means, for reading pixels from selected adjacent interlaced scanning lines stored in the memory; averaging means, operatively connected to the multiplexer and the timing means, for averaging pixels from adjacent scanning lines; and an encoder, operatively connected to the averaging means for encoding the averaged pixels. - View Dependent Claims (7, 8)
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Specification