Pseudo-Random DOT Scan Television Systems

摘要

The principal psychophysical requirements of the human eye are satisfied by a television frame frequency of 1 or 2 cycles/sec. To avoid flicker with such low frame rates, a pseudo-random dot scan is employed in conjunction with long-persistence phosphors. Experiments show that 15% dot flicker is tolerable. Ten systems are discussed, including a two-million-element picture with 4 mc/sec bandwidth; tape recording at 15 inches/sec; the continuous relaying of satellite pictures; short-wave transmission; phonevision; and very low frame rate applications that use a scan conversion system. (Author)