A technical possibility of satellite multi-channel digital TV broadcasting has been studied in the study group of the Ministry of Posts and Telecommunications. Subjective evaluation tests for digital coded pictures have been conducted to reveal the performance of present digital coding techniques. This paper describes the results of these tests in detail. The conclusions on multi-channel TV broadcasting are as follows (1) If the higher picture quality than those of NTSC studio standard pictures is required for the digital TV, no system using in these tests can meet this requirement. (2) If the higher picture quality than those of FM-NTSC pictures is required, there is a possibility of servicing three digital television programs using one channel of satellite broadcasting.
