Automatic Multichannel Simplification with Low Impacts on Sound Pressure at Ears
Automatic Multichannel Simplification with Low Impacts on Sound Pressure at Ears
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DOI：
10.1007/978-3-319-13168-9_40
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发表时间：
2014-12
期刊：
影响因子：
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通讯作者：
Dengshi Li;R. Hu;Xiaochen Wang;Weiping Tu;Shan-Siang Yang
中科院分区：
文献类型：
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作者：
Dengshi Li;R. Hu;Xiaochen Wang;Weiping Tu;Shan-Siang Yang
人们希望用最少的扬声器布置，在家中重现电影3D音效的体验。虽然安藤变换可以通过保持声源处的声压来变换声道声音系统，但是使用大量的主观评价来区分由扬声器布置再现的空间声音的体验是耗时且昂贵的。为了解决这个问题，在简化从m-通道到（n-1）-通道的同时，不仅要保证原点声压不变，而且要将耳端声压的绝对误差限制在给定阈值或更小，并提出了一种从m-通道到（n-1）-通道声音系统的自动简化算法。以22.2多声道音响系统为例，在没有两个低频效果声道的情况下，可以自动简化为8个声道，扬声器总布置为23个。该方法的主观评价结果与安藤变换法相当，节省了主观评价的成本。
People hope to use minimum arrangement of loudspeakers to reproduce the experience of the film 3D sound at home. Although the Ando’s conversion can convertn- tom-channel sound system by maintaining the sound pressure at the origin, it is time-consuming and expensive to use lots of subjective evaluations to distinguish the experience of spatial sound reproduced bym-loudspeaker arrangements. To solve this problem, we not only ensure the sound pressure at the origin invariably, but also limit the absolute error of sound pressure at ears to a given threshold or less while simplifying fromn- to (n-1)-channel, and an automatic simplification algorithm fromn- tom-channel sound system is proposed. The 22.2 multichannel sound system without two low-frequency effect channels as an example can be simplified to eight channels automatically and the total loudspeaker arrangements is 23. The subjective evaluation is comparable to that of the Ando’s conversion and the cost of subjective evaluation is saved.