Subjective tests on visual telecommunications standards
作者:
G.M.Reid,
期刊:
IEE Proceedings F (Communications, Radar and Signal Processing)
(IET Available online 1980)
卷期:
Volume 127,
issue 1
页码: 3-8
年代: 1980
DOI:10.1049/ip-f-1.1980.0001
出版商: IEE
数据来源: IET
摘要:
Quality grading tests have been conducted to investigate the subjective effects of various combinations of transmission channel bandwidth, television-line standard and display size. The test pictures used were head-and-shoulders views. 313-line signals transmitted through a channel with 1 MHz bandwidth proved to be more acceptable than 625-line signals transmitted through the same channel. A smaller display of height, equal to 1/8 times the viewing distance, was always preferred to one of height equal to 1/4 times the distance. The results will be of use in determining the parameters for future visual telecommunications systems, not necessarily using the 625-line broadcast t.v. standard.
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