저역 위상 처리와 고역 반사음을 이용한 텔레비전에서의 음상 확장

An Expansion of Sound Image Using Phase Shifting of Low Frequency and Reflected Sound of High Frequency in Television

In television stereo system, to produce the sound image for spatial impression is too difficult because of the narrow distence between two speakers. A method of widening the sound image using precedence effect was introduced but it didn't work effectively in low frequency band. In this paper, we propose a new method to produce an expanded sound image in full band of audio requency in band sound is expanded by phase shifting method and a higher frequency band sound is expanded by reflection. In simulation and experiment, the proposed system guarantees useful effect of sound image expansion in television stereo system.