최근 PC의 성능이 향상되고 디지털 신호처리 기술이 발달함에 따라 복잡한 계산을 필요로 하는 입체음향 처리를 PC상에서도 구현하는 것이 가능하게 되면서, 멀티미디어 분야에서 입체음향에 대한 관심이 고조되고 있다. 특히 2채널 방식의 입체음향 기술은 공간활용성과 경제성에서 우수하여 많은 연구가 진행되고 있다. 2채널 재생 방식에 있어서 위치음 효과는 비교적 단순한 반면에, 이동음 효과는 특정 점에서만 측정된 머리전달함수를 이용하여 이동하는 음을 생성해야 하기 때문에 해결해야 할 문제점이 많다. 본 논문에서는 입체음향을 2채널로 재생할 때 이동음 효과가 부드럽게 생성되도록 하는 방법에 대해 다루고자 한다. 특히 부드럽게 궤적을 생성하는 방법, 그리고 이동음의 출력이 이산적인 공간에서 부드럽게 연결되도록 하는 방법에 대해서 제안하고 실제 테스트를 통해서 그 유용성을 보여준다.
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