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Establishment of a method to reconstruct of spatial information of sound in the receiver side of the sound

声音接收端声音空间信息重构方法的建立

基本信息

批准号：
13650404
负责人：
OZAWA Kenji
金额：
$ 1.92万
依托单位：
University of Yamanashi
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650404/
关键词：
binaural reproduction 3D spatial information of sound impulse response word intelligibility naturalness video conference H.263 coding competitive talkers H.263符合化スペクトル音響特性補正

项目摘要

In order to yield natural communication in distant collaboration via a network, it is important to transmit and reproduce spatial information of sound as well as clear speech signals. The objective of this study was to establish a method to transmit and reproduce of three dimensional spatial information of sound in the receiver side of the sound. The study was conducted in the following two aspects.(1) High fidelity reproduction of transmitted spatial information by the receiverTo examine the property of the proposed method, the term to correct frequency characteristics of the transmitted acoustical information in the proposed method was investigated by psychoacoustical experiments. The effect of determination of the term by reducing the impulse response was evaluated by subjects. As a result, the impulse response could be reduced to 0.1 in length to conserve the naturalness of the recorded sound. This certificates the validity of the proposed method to be used in an actual condition.(2) Reconstruction of three dimensional information of soundTo examine the effectiveness of the proposed method, the performance of the method was compared with ordinal methods, i.e. monaural and stereophonic systems, in a video conference with multiple talkers. Three talkers pronounced different words simultaneously, and a listener was asked to listen to the word of the designated talker. The obtained word intelligibility of the proposed method was approximately 20 % higher than those of the ordinal methods. This effectiveness of the proposed method was independent of the quality of accompanying video.

为了在经由网络的远程协作中产生自然的通信，重要的是传输和再现声音的空间信息以及清晰的语音信号。本研究的目的是建立一种在声音接收端传输和再现声音三维空间信息的方法。本研究主要从以下两个方面进行。(1)接收机高保真再现传输的空间信息为了检验所提出方法的性能，通过心理声学实验研究了所提出方法中校正传输声学信息频率特性的术语。由受试者评价通过减少脉冲响应确定项的效果。结果，脉冲响应的长度可以减少到0.1，以保持记录声音的自然度。这证明了所提出的方法在实际条件下使用的有效性。(2)为了检验所提出方法的有效性，在多人视频会议系统中，将该方法与常规方法，即单声道和立体声系统的性能进行了比较。三个说话者同时发出不同的单词，一个听者被要求听指定说话者的单词。所提出的方法获得的字的可懂度是约20%，高于顺序的方法。该方法的有效性与伴随视频的质量无关。