Portal de Periódicos da CAPES

New CBC Vidicon-Telecine Operating Standards: With Particular Reference to the Gray-Scale Characteristic

1964; Society of Motion Picture and Television Engineers; Volume: 73; Issue: 12 Linguagem: Inglês

10.5594/j15383

0361-4573

Stanley Quinn, J. Bowie Dickson,

Optical measurement and interference techniques

The results presented are from an investigation to obtain optimum picture quality in 16mm vidicon-telecine installations of the Canadian Broadcasting Corp. Picture quality is examined in terms of signal-to-noise ratio, resolution, gray-scale rendition and lag. As a consequence to the investigation, new standard values of the vidicon peak-white signal current, aperture correction and gray-scale correction are about to be introduced into CBC operations. — The telecine gray-scale characteristic is plotted together with a typical 16mm print-through characteristic. The resultant curve is shown to be similar to that of the image-orthicon camera. The measurement of the gray-scale characteristic, using the Holmes-CBC slide, is shown to be distorted by shading errors, and a new slide is introduced to minimize this problem.