서지주요정보
입체음향시스템을 위한 라우드스피커의 배치방법과 구동방법 = Arrangement and driving methods of loudspeakers for virtual sound localization system
서명 / 저자 입체음향시스템을 위한 라우드스피커의 배치방법과 구동방법 = Arrangement and driving methods of loudspeakers for virtual sound localization system / 김선민.
저자명 김선민 ; Kim, Sun-Min
발행사항 [대전 : 한국과학기술원, 2004].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8015446

소장위치/청구기호

학술문화관(문화관) 보존서고

DME 04015

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

초록정보

A virtual sound rendering is a technology, which places a virtual sound source at an arbitrary position in 3D space. Human vision is mostly confined to the area in the front and so humans depend heavily on the sense of hearing to gather information in area out of sight. Thus, a virtual reality system capable of producing 3D sound effects gives the user a much better sense of reality than the system without such capability. There are generally two ways to render a virtual sound. One is a binaural sound system utilizing a 2-channel loudspeaker set or a headphone. The other is a multichannel 3D sound system utilizing a multiple loudspeaker set. There are two kinds of hot issues on the binaural sound rendering. One is the design method of crosstalk cancellation. The other is the loudspeaker arrangement for robust performance. The binaural sound system utilizing a 2-channel loudspeaker set requires crosstalk cancellation, which is generally designed in the form of an FIR filter by using an adaptive scheme. The adaptive algorithm implemented in the filter requires tuning parameters such as filter length, modeling delay and step size which are difficult to obtain. In Chapter 2, an effective design method of crosstalk cancellation is proposed which directly obtains the inverse filter with the desired accuracy and less time and effort. The crosstalk can be imperfectly cancelled and the localization performance of the binaural sound system deteriorates if there exists an uncertainty such as head movement. In Chapter 3, loudspeaker arrangement method is proposed for robust performance of the binaural sound system. The effect of uncertainty on localization performance of the binaural sound system is theoretically investigated. New robustness measure is defined and the robustness is analyzed with respect to the span angle of two loudspeakers and the frequency of the sound source. The loudspeaker arrangement methods are suggested for robust binaural sound system according to head movement of a listener. The multichannel 3D sound system generally depends on the amplitude panning method to render virtual sound. The amplitude panning methods are derived under the assumption that all loudspeakers are placed at equal distance from head center, which is often easily violated in real practice. In Chapter 4, the method to determine an appropriated loudspeaker output without the burden of position constraint is proposed. To verify the feasibility of the proposed methodologies, computer simulations are carried out and the results are presented in the corresponding chapters. In Chapter 5, subjective tests are carried out for arrangement and driving method of two channel loudspeakers and driving method of multiple loudspeakers. Some examples of virtual 3D sound rendering systems for virtual reality simulators such as bicycle and helicopter simulator are introduced.

서지기타정보

서지기타정보
청구기호 {DME 04015
형태사항 v, 114 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 수록
저자명의 영문표기 : Sun-Min Kim
지도교수의 한글표기 : 박영진
지도교수의 영문표기 : Young-Jin Park
학위논문 학위논문(박사) - 한국과학기술원 : 기계공학전공,
서지주기 참고문헌 : p. 105-107
주제 바이너럴 사운드
다채널 입체음향 시스템
강인한 스피커 배치방법
크로스톡 제거기
시뮬레이터
BINAURAL SOUND
MULTICHANNEL VIRTUAL SOUND SYSTEM
ROBUST ARRANGEMENT OF LOUDSPEAKERS
CROSSTALK CANCELLATION
SIMULATOR
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