Kazuhiko Yoshizawa

11.3: A 61-inch High Definition Projection TV for ATSC standard

A 61-inch, high definition projection TV having a large neck 36.5mm neck diameter CRT and ATSC 18 format digital decoder has been developed. The large neck CRT is driven by a highly stabilized deflection circuit and 30MHz wide band video drive circuit. This HDTV enables excellent image quality for ATSC HD signal sources. The specifications of the display are horizontal 900TV line resolution, 550Cd/m2 peak brightness and contrast ratio 100. We report on the technology to realize these high performance features.

Improvement of Picture Quality in Variable Play of D-2 VTR: Field Conversion System Using Motion Adaptive Signal Processing

We have developed a motion-adaptive field conversion system for nonstandard speed play of a D-2 composite VCR. It employs a combination of a Y/C separation technique and a line-interpolation technique which adaptively uses interfield signals. We have also developed a new motion detecting method. This method adds interfield motion detection by level comparison to a conventional method using a temporal-spatial filter. With those techniques, it has become possible to improve the periodical displacement of vertical transitions, deterioration of vertical resolution, flicker in the chrominance signal, and other undesired effects. So picture quality equal to that of normal play mode was obtained in nonstandard-speed play mode.