Abstract: Filtration of an input signal implemented in the horizontal or vertical direction may disorder the gradation in oblique directions, so that oblique lines may become jagged. To deal with this situation, the following components are provided to process the input signal: a waveform correcting means (6) having a correcting characteristic that the slope for correction in the medium-luminance range is greater than that in the high-luminance range or in the low-luminance range; a processing means (7) for extracting the deviation of the input signal processed by the waveform correcting means; a picture edge strength detecting means (1); and a processing means (8) for performing operations based on the deviation of the input signal and the picture edge strength.

Abstract: Filtration of an input signal implemented in the horizontal or vertical direction may disorder the gradation in oblique directions, so that oblique lines may become jagged. To deal with this situation, the following components are provided to process the input signal: a waveform correcting means (6) having a correcting characteristic that the slope for correction in the medium-luminance range is greater than that in the high-luminance range or in the low-luminance range; a processing means (7) for extracting the deviation of the input signal processed by the waveform correcting means; a picture edge strength detecting means (1); and a processing means (8) for performing operations based on the deviation of the input signal and the picture edge strength.

Abstract: A cathode-ray tube control device displays data obtained from a personal computer on the screen of a television receiver in superimposing relation to the picture of a broadcast. Clock pulses are generated, and these are counted in synchronism with the horizontal and vertical synchronizing signals from the television receiver. Display timing signals including horizontal scanning display period signal, horizontal retrace period signal, vertical scanning display period signal, and vertical retrace period signal are delivered in response to the resultant counts. Then, read-out of data to be displayed is controlled in accordance with the produced timing signals, and the read data is displayed on the screen such that it is superimposed on the picture of a television broadcast. If desired, the frequency of the timing signals may be slightly varied so as to scroll said data across the television picture.

Abstract: A cathode-ray tube control device displays data obtained from a personal computer on the screen of a television receiver in superimposing relation to the picture of a broadcast. Clock pulses are generated, and these are counted in synchronism with the horizontal and vertical synchronizing signals from the television receiver. Display timing signals including horizontal scanning display period signal, horizontal retrace period signal, vertical scanning display period signal, and vertical retrace period signal are delivered in response to the resultant counts. Then, read-out of data to be displayed is controlled in accordance with the produced timing signals, and the read data is displayed on the screen such that it is superimposed on the picture of a television broadcast. If desired, the frequency of the timing signals may be slightly varied so as to scroll said data across the television picture.