3D Sound Field Reproduction at Non Central Point for NHK 22.2 System

详细信息    查看全文

• 关键词：Sound field reproduction ; Non central point ; Multichannel system ; Sound physical property
• 刊名：Lecture Notes in Computer Science
• 出版年：2017
• 出版时间：2017
• 年：2017
• 卷：10132
• 期：1
• 页码：3-14
• 丛书名：MultiMedia Modeling
• ISBN：978-3-319-51811-4
• 卷排序：10132

文摘

Reducing channel number is convenient for NHK 22.2 system in loudspeaker layout and good for the application of NHK 22.2 in family environment. In 2011, Akio Ando has proposed a down-mixing method which could simplify 22.2 multichannel system to 10.2 and 8.2 multichannel system, but this method only could perfect reproduce 3D sound field at a central listening point. In practice, people may stay at a non central point, Ando’s method could not maintain sound physical properties at non central point well. Conventional non central zone sound filed reproduction methods such as pressure matching method and particle velocity matching method have theoretical limitations. This paper propose a general down-mixing method basing on the position of listening point and sound physical properties, it could produce a sweet spot at any non central point in reconstruction field and reduce channel number. In experiments, the proposed method simplifies 22 channel system to 10 channel system, experimental results demonstrate that it performs better than traditional method at non central point sound field reconstruction.