大画面テレビにおける映像と音像定位のずれの許容値について : 画像表示 : 視覚情報 : 画像通信システム(<特集>視覚と画質)

抄録

Some recent studies suggest that ordinary stereophonic system is not sufficient for HDTV. One of the reasons may be localization error between picture and sound which occurs with non-axial viewing. This experiment. is designed to investigate the permissible extent of angular displacement between sound image and picture on the wide screen. The data, which is scaled by the method of successive categories, shows that the extent is about 11 degrees for acoustic engineers and about 20 degrees for ordinary subjects. Based on the results, this paper discusses how many frontal loudspeakers are required for HDTV.