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The Design of Object-based 3D Audio Broadcasting System  

강경옥 (한국전자통신연구원 방송미디어연구부)
장대영 (한국전자통신연구원 방송미디어연구부)
서정일 (한국전자통신연구원 방송미디어연구부)
정대권 (한국항공대학교 항공전자공학과)
Abstract
This paper aims to describe the basic structure of novel object-based 3D audio broadcasting system To overcome current uni-directional audio broadcasting services, the object-based 3D audio broadcasting system is designed for providing the ability to interact with important audio objects as well as realistic 3D effects based on the MPEG-4 standard. The system is composed of 6 sub-modules. The audio input module collects the background sound object, which is recored by 3D microphone, and audio objects, which are recorded by monaural microphone or extracted through source separation method. The sound scene authoring module edits the 3D information of audio objects such as acoustical characteristics, location, directivity and etc. It also defines the final sound scene with a 3D background sound, which is intended to be delievered to a receiving terminal by producer. The encoder module encodes scene descriptors and audio objects for effective transmission. The decoder module extracts scene descriptors and audio objects from decoding received bistreams. The sound scene composition module reconstructs the 3D sound scene with scene descriptors and audio objects. The 3D sound renderer module maximizes the 3D sound effects through adapting the final sound to the listner's acoustical environments. It also receives the user's controls on audio objects and sends them to the scene composition module for changing the sound scene.
Keywords
MPEG-4; Audio broadcasting system; Object oriented; 3D audio; MPEG-4; User interactivity; Sound scene descriptor;
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