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Audio Contents Adaptation Technology According to User′s Preference on Sound Fields  

강경옥 (한국전자통신연구원 방송미디어연구그룹)
홍재근 (경북대학교 전자전기공학)
서정일 (한국전자통신연구원 방송미디어연구그룹)
Abstract
In this paper. we describe a novel method for transforming audio contents according to user's preference on sound field. Sound field effect technologies. which transform or simulate acoustic environments as user's preference, are very important for enlarging the reality of acoustic scene. However huge amount of computational power is required to process sound field effect in real time. so it is hard to implement this functionality at the portable audio devices such as MP3 player. In this paper, we propose an efficient method for providing sound field effect to audio contents independent of terminal's computational power through processing this functionality at the server using user's sound field preference, which is transfered from terminal side. To describe sound field preference, user can use perceptual acoustic parameters as well as the URI address of room impulse response signal. In addition, a novel fast convolution method is presented to implement a sound field effect engine as a result of convoluting with a room impulse response signal at the realtime application. and verified to be applicable to real-time applications through experiments. To verify the evidence of benefit of proposed method we performed two subjective listening tests about sound field descrimitive ability and preference on sound field processed sounds. The results showed that the proposed sound field preference can be applicable to the public.
Keywords
Sound field; Preference; Room impulse response signal; Perceptual acoustic parameter; Fast convolution algorithm;
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