The Quality Rating of Color Television Pictures

Certain papers published by the British Post Office on the subjective impairment of television pictures, which do not seem to have attracted the attention they deserve, make it possible to derive an overall subjective rating factor for a picture having a number of individual impairments from which in turn can be derived the statistical spread of opinion over the population corresponding to the total impairment. In instances where one distortion can be varied at the expense of one or more others a simple criterion is available for the optimum condition. Although the information relates to 625-line NTSC pictures, the principle can be applied to 525-line pictures.