본 논문에서는 MPEG-I Immersive Audio 의 RM (Reference model)에서 제공하는 HOA 재생 기술의 음장감 재현 성능을 인지적으로 향상시킬 수 있는 방법과 이에 따른 주관 청취평가 결과를 제시한다. MPEG-I Immersive Audio 에서는 CfP test 이후 공개된 RM 에서 제공하는 다양한 신호처리 기술 중 HOA 신호 재생 방식은 cspace 를 relative 로 설정함으로써 청취자의 이동이나 머리 회전 등의 상황에서는 음장이 왜곡되는 인지적 문제점이 있어, cspace 를 user 로 변경함으로써 이에 대한 개선이 가능하며, MPEG-I Immersive Audio CfP test 와 동일한 환경에서 주관 청취평가를 수행하여 개선 방식의 효과를 확인할 수 있었다. 이를 통해 MPEG-I 기반의 보다 안정적인 음장을 제공하는 HOA 재생 방식이 마련된 것으로 평가한다.
KSP Keywords
MPEG-I, Reference model, immersive audio
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