Improvements of Television Picture Quality by Eliminating the Disturbances Caused by Interlaced Scanning

Interlaced scanning is an effective technique to transmit pictures, but it causes an inherent disturbance in interlaced scanning (interlace disturbance) and deteriorates the picture quality. Recent developments of television signals and picture monitors have increased the interlace disturbance. A dual-beam display method which does not produce the interlace disturbance was constructed. By this apparatus, the effect of interlace disturbance and a tradeoff problem of the picture quality were tested. The results are as follows. 1) When the interlace disturbance is eliminated, the still picture quality is greatly improved. The higher the quality of the input signal, the greater the improvement of the picture quality. 2) The conspicuous scene strongly affects the overall picture quality in spite of the small probability of occurrence.