Picture Quality-Procedures for Evaluating Subjective Effects of Interference

In 1958, Panel 6 (Levels of Picture Quality) of the Television Allocations Study Organization conducted a comprehensive study of the subjective effects on picture quality of a number of types of interfering signals and noise, as functions of the levels of interference. These tests were designed and carried out by teams of engineers and experimental psychologists using a selective group of lay observers. This paper deals with the design of the tests and with the laboratory facilities used in the tests.