Advanced Multichannel Audio Systems with Superior Impression of Presence and Reality

摘要

Various sound systems have been studied at NHK with the objective of developing the next-generation broadcasting system. This paper introduces an ultimate 22.2 multichannel audio system for ultrahigh-definition video with 4000 scanning lines, and an advanced multichannel sound system with frontal loudspeakers placed in several rows for reproducing a live sound field. The former system has three vertical layers of loudspeakers with 2 LFEs, namely 3 loudspeakers at the bottom layer, 10 loudspeakers at the middle layer, 9 loudspeakers at the upper layer and 2 LFEs. The latter system consists of frontal loudspeaker-ranks and rear loudspeaker-arrays for reproducing a natural impression of depth and ambience. This paper describes the principal advantages of the newly proposed multichannel audio system over ordinary multichannel sound systems such as the 5.1.