A Consumer USE Flicker Free Color Monitor Using Digital Signal Processing

With the spread of new video services such as teletext, captain and also DBS broadcasting, and with the pervasion of video package equipment like VCRs and optical video disc players, a TV receiver not only accepts on-air broadcasting programs but also is expected to work as a display monitor. A TV receiver as a monitor must necessarily be equipped with the improved picture quality within the current TV standards. Though the existing TV standard (NTSC) is highly sophisticated, its interlaced scanning, however, yields a poor result in terms of the vertical resolution. Especially, in case of a large size screen, the scanning line structure and the line flicker degrade the vertical resolution and sharpness significantly. In order to solve this problem, we have developed a practical intra-field adaptive line interpolating system with a small capacity of field memory and also designed a vertical contour compensation filter. In addition, by using the field memory in common, we have introduced a new function of "picture and still picture" with no cost increase.