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Investigating the interaction between positions and signals of height-channel loudspeakers in reproducing immersive 3d sound.

机译：研究高度声道扬声器的位置和信号之间的交互作用，以再现沉浸式3d声音。

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摘要

Since transmission capacities have significantly increased over the past few years, researchers are now able to transmit a larger amount of data, namely multichannel audio content, in the consumer applications. What has not been investigated in a systematic way yet is how to deliver the multichannel content. Specifically, researchers' attention is focused on the quest of a standardized immersive reproduction format that incorporates height loudspeakers coupled with the new high-resolution and three-dimensional (3D) media content for a comprehensive 3D experience. To better understand and utilize the immersive audio reproduction, this research focused on the (1) interaction between the positioning of height loudspeakers and the signals fed to the loudspeakers, (2) investigation of the perceptual characteristics associated with the height ambiences, and (3) the influence of inverse filtering on perceived sound quality for the realistic 3D sound reproduction. The experiment utilized the existence of two layers of loudspeakers: horizontal layer following the ITU-R BS.775 five-channel loudspeaker configuration and height layer locating a total of twelve loudspeakers at the azimuth of +/-30°, +/-50°, +/-70°, +/-90°, +/-110° and +/-130° and elevation of 30°. Eight configurations were formed, each of which selected four height-loudspeakers from twelve. In the subjective evaluation, listeners compared, ranked and described the eight randomly presented configurations of 4-channel height ambiences. The stimuli for the experiment were four nine-channel (5 channels for the horizontal and 4 for the height loudspeakers) multichannel music. Moreover, an approach of Finite Impulse Response (FIR) inverse filtering was attempted, in order to remove the particular room's acoustic influence. Another set of trained professionals was informally asked to use descriptors to characterize the newly presented multichannel music with height ambiences rendered with inverse filtering. The experimental results indicate the significance of the positioning of the loudspeakers with respect to the signals being fed to those loudspeakers in delivering a 3D sound field. Furthermore, it has been revealed that the perceptual characteristics that listeners linked for multichannel music with height ambiences include envelopment, elevatedness and fullness. Last but not least, after applying the inverse filtering the subjective preference was not affected significantly. This allows for the author to believe that, in fact, the room's influence with respect to the subjective evaluation is not as important as the appropriate loudspeaker-positioning for the multichannel-reproduced music with height ambiences.
机译：由于过去几年的传输容量已大大增加，因此研究人员现在能够在消费类应用程序中传输大量数据，即多通道音频内容。尚未以系统的方式进行调查的是如何传递多通道内容。具体来说，研究人员的注意力集中在寻求标准化的沉浸式再现格式上，该格式将高度扬声器与新型高分辨率和三维（3D）媒体内容结合在一起，以提供全面的3D体验。为了更好地理解和利用沉浸式音频再现，本研究着重于（1）高度扬声器的定位与馈入扬声器的信号之间的相互作用，（2）研究与高度环境相关的感知特性，以及（3） ）逆滤波对逼真的3D声音再现的感知音质的影响。该实验利用了两层扬声器的存在：遵循ITU-R BS.775五通道扬声器配置的水平层，以及位于+/- 30°，+ /-50°方位上的总共十二个扬声器的高度层。 ，+ /-70°，+ /-90°，+ /-110°和+/- 130°，仰角为30°。形成了八个配置，每个配置都从十二个中选择了四个扬声器。在主观评估中，听众比较，排名和描述了八种随机呈现的4声道高度环境配置。实验的刺激是四个九通道（水平通道为5个通道，高音扬声器为4个）多通道音乐。此外，为了消除特定房间的声学影响，尝试了一种有限冲激响应（FIR）逆滤波方法。非正式地要求另一组训练有素的专业人员使用描述符来表征新呈现的多声道音乐，并通过逆滤波呈现高度环境。实验结果表明，在传递3D声场时，扬声器相对于馈送到那些扬声器的信号的位置很重要。此外，已经揭示出，收听者链接到具有高度氛围的多声道音乐的感知特征包括包络，提升和丰满。最后但并非最不重要的一点是，在应用逆滤波后，主观偏好不会受到显着影响。这使作者相信，事实上，对于主观评价而言，房间的影响并不像针对具有高度环境的多通道再现音乐的适当扬声器位置那样重要。

著录项

  • 作者

    Karampourniotis, Antonios.;

  • 作者单位

    Rochester Institute of Technology.;

  • 授予单位 Rochester Institute of Technology.;
  • 学科 Physics Acoustics.;Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2014
  • 页码 73 p.
  • 总页数 73
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 公共建筑;
  • 关键词

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