首页> 外国专利> METHOD FOR RENDERING MULTI-CHANNEL AUDIO SIGNALS FOR L1 CHANNELS TO A DIFFERENT NUMBER L2 OF LOUDSPEAKER CHANNELS AND APPARATUS FOR RENDERING MULTI-CHANNEL AUDIO SIGNALS FOR L1 CHANNELS TO A DIFFERENT NUMBER L2 OF LOUDSPEAKER CHANNELS

METHOD FOR RENDERING MULTI-CHANNEL AUDIO SIGNALS FOR L1 CHANNELS TO A DIFFERENT NUMBER L2 OF LOUDSPEAKER CHANNELS AND APPARATUS FOR RENDERING MULTI-CHANNEL AUDIO SIGNALS FOR L1 CHANNELS TO A DIFFERENT NUMBER L2 OF LOUDSPEAKER CHANNELS

机译：将L1频道的多通道音频信号提供给不同数量的扬声器信道L2的方法和将L1频道的多通道音频信号提供给不同的扬声器信道数量L2的设备

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摘要

Multi-channel audio content is mixed for a particular loudspeaker setup. However, a consumer's audio setup is very likely to use a different placement of speakers. The present invention provides a method of rendering multi-channel audio that assures replay of the spatial signal components with equal loudness of the signal. A method for obtaining an energy preserving mixing matrix (G) for mixing L1 input audio channels to L2 output channels comprises steps of obtaining (s711) a first mixing matrix Ĝ, performing (s712) a singular value decomposition on the first mixing matrix Ĝ to obtain a singularity matrix S, processing (s713) the singularity matrix S to obtain a processed singularity matrix Ŝ, determining (s715) a scaling factor a, and calculating (s716) an improved mixing matrix G according to G = aUŜV^T. The perceived sound, loudness, timbre and spatial impression of multi-channel audio replayed on an arbitrary loudspeaker setup practically equals that of the original speaker setup.

机译：多声道音频内容被混合用于特定的扬声器设置。但是，消费者的音频设置很可能会使用不同的扬声器位置。本发明提供了一种呈现多声道音频的方法，该方法确保以相同的响度来重放空间信号分量。一种获得用于将L1个输入音频通道混合到L2个输出通道的能量保存混合矩阵（ G ）的方法，包括获得（s711）第一混合矩阵的步骤。 Ĝ，对第一混合矩阵Ĝ进行奇异值分解，以获得奇异矩阵 S， s713）奇异矩阵 S ，以获得处理后的奇异矩阵 Ŝ ，确定（s715）比例因子< I> a ，并根据 G =计算（S716）改进的混合矩阵 G a U ŜV^{T 。感知到的声音，响度，音色和空间印象在任意扬声器设置上播放的多声道音频的数量实际上等于原始扬声器设置的数量。} 展开▼

著录项

公开/公告号EP3531721A1

专利类型

公开/公告日2019-08-28

原文格式PDF

申请/专利权人 DOLBY INTERNATIONAL AB;
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申请/专利号EP20180199889

发明设计人 BOEHM JOHANNES;
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申请日2014-07-18

分类号H04S3/02;H04S7;

国家 EP

入库时间 2022-08-21 12:27:09

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