Analysis of distortion in a PAM-FM television transmission and application to the MUSE signal

From the viewpoint of signal format, the MUSE signal for HDTV-DBS transmission is a kind of pulse amplitude modulation (PAM) signal. Since PAM signals have never been used for TV signal transmission, the author investigated the relationship between distortion due to FM transmission and picture quality. The relationship is made clear by the following two steps. First, a rating function, by which the degree of picture quality impairment due to baseband distortion can be described, is developed by applying the variable frequency electric circuit theory due to J.R. Carson and T.C. Fry (1937). The degree of picture quality impairment due to FM transmission of the MUSE signal can be obtained by the rating function with calculated waveform distortion. This approach can be used for other PAM television signals such as the HD-MAC system.<
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