HIGH DEFINITION TELEVISION SIGNAL SYSTEM

摘要

PURPOSE:To improve resolution by converting picked-up video signals to 525 successive scan signals of 30 frames/30 fields/sec and subjecting them to signal processing. CONSTITUTION:In the image pickup transmission side, 525 successive scan signals of 30 fields/30 frames/sec have high band components YH1 and YH2 of a luminance signal Y subjected to three-dimensional amplitude modulation and have the frequency shifted into 4.2MHz transmission band and are multiplexed and are converted to 525 interlace NTSC-TV signals of 60 fields/30 frames/sec and are transmitted. In the reception side, they are converted to 525 successive scan video signals of 30 fields/30 frames/sec, and signals YL, C', YH'1, and YH'2 are separated in a three-dimensional frequency area in case of a still picture and signals YL, C', and YH'1 are separated in a two-dimensional frequency area in case of moving picture to demodulate them to signals Y, I, and Q, and they are converted to RBG signals and are converted to 525 successive scan video signals of 60 fields/60 frames/sec and are projected. Thus, vertical and horizontal resolutions are considerably improved.