Three-party sound field sharing system based on the boundary surface control principle -Subjective assessment of voice reproduction with speaker's facing angle

Yusuke Ikeda, Seigo Enomoto, Shiro Ise, Satoshi Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A telecommunication system makes communicating more comfortable if it ensures that parties involved in distant communication feel as if they are located in the same space during their conversation. By applying physically accurate sound field reproduction, we aim to develop a telecommunication system which enables us to feel the presence of a conversational partner. In pursuit of physically accurate sound field reproduction, we have developed a sound field reproduction system based on the boundary surface control principle. We have also developed a two-party sound field sharing telecommunication system using that reproduction system. In this paper, we describe an extension of that system to three-party system and conduct the subjective assessment of its voice reproduction. In pursuit of decreasing the amount of real-time convolution calculations, we applied Gram-Schmidt orthogonalization to reduce the number of secondary sound sources. In a three-party conversation, it is important to know "who talks to whom". Accordingly, when one of conversational partners turns towards another partner in three-party conversation, we reproduce natural changes in voice directivity caused by head rotation by detecting facing angle through image recognition and by adjusting the voice filter to suit that angle. However, this requires the voice reproduction with accuracy enough to acoustically perceive "who talks to whom". Thus, we conducted subjective assessments of the speaker's facing angle both in real environment and in sound reproduction environment. As a result of average angle error in sound reproduction environment, we found out that the system reproduced voice with accuracy enough to perceive who talks to whom. And we also found that there was little difference in the voice facing angle between perception in the real environment and in the sound field reproduction environment for a half of the subjects. Copyright

Original languageEnglish
Title of host publication20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society
Pages960-965
Number of pages6
Volume2
Publication statusPublished - 2010
Externally publishedYes
Event20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society - Sydney, NSW, Australia
Duration: 2010 Aug 232010 Aug 27

Other

Other20th International Congress on Acoustics 2010, ICA 2010 - Incorporating the 2010 Annual Conference of the Australian Acoustical Society
CountryAustralia
CitySydney, NSW
Period10/8/2310/8/27

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ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Ikeda, Y., Enomoto, S., Ise, S., & Nakamura, S. (2010). Three-party sound field sharing system based on the boundary surface control principle -Subjective assessment of voice reproduction with speaker's facing angle. In 20th International Congress on Acoustics 2010, ICA 2010 - Incorporating Proceedings of the 2010 Annual Conference of the Australian Acoustical Society (Vol. 2, pp. 960-965)