公开(公告)号：WO9725834A3

公开(公告)日：1997-09-18

申请号：PCT/US9700145

申请日：1997-01-03

Applicant: VIRTUAL LISTENING SYSTEMS INC ,  TUCKER TIMOTHY J ,  GREEN DAVID M

Inventor： TUCKER TIMOTHY J ,  GREEN DAVID M

IPC: H04R29/00 ,  H04S3/00 ,  H04S7/00 ,  H04S1/00 ,  H04S5/00

CPC classification number: H04S7/30 ,  H04R29/001 ,  H04S3/004 ,  H04S3/008 ,  H04S2400/01 ,  H04S2420/01

Abstract: A method and device processes multi-channel audio signals, each channel corresponding to a loudspeaker placed in a particular location in a room, in such a way as to create, over headphones, the sensation of multiple 'phantom' loudspeakers placed throughout the room. Head Related Transfer Functions (HRTFs) are chosen according to the elevation and azimuth of each intended loudspeaker relative to the listener, each channel being filtered with an HRTF such that when combined into left and right channels and played over headphones, the listener senses that the sound is actually produced by phantom loudspeakers placed throughout the 'virtual' room. A database collection of sets of HRTF coefficients from numerous individuals and subsequent matching of the best HRTF set to the individual listener provides the listener with listening sensations similar to that which the listener, as an individual, would experience when listening to multiple loudspeakers placed throughout the room. An appropriate transfer function applied to the right and left channel output allows the sensation of open-ear listening to be experienced through closed-ear headphones.

公开(公告)号：WO1997025834A2

公开(公告)日：1997-07-17

申请号：PCT/US1997000145

申请日：1997-01-03

Applicant: VIRTUAL LISTENING SYSTEMS, INC. ,  TUCKER, Timothy, J. ,  GREEN, David, M.

Inventor： VIRTUAL LISTENING SYSTEMS, INC.

IPC: H04S01/00

CPC classification number: H04S7/30 ,  H04R29/001 ,  H04S3/004 ,  H04S3/008 ,  H04S2400/01 ,  H04S2420/01

Abstract: A method and device processes multi-channel audio signals, each channel corresponding to a loudspeaker placed in a particular location in a room, in such a way as to create, over headphones, the sensation of multiple "phantom" loudspeakers placed throughout the room. Head Related Transfer Functions (HRTFs) are chosen according to the elevation and azimuth of each intended loudspeaker relative to the listener, each channel being filtered with an HRTF such that when combined into left and right channels and played over headphones, the listener senses that the sound is actually produced by phantom loudspeakers placed throughout the "virtual" room. A database collection of sets of HRTF coefficients from numerous individuals and subsequent matching of the best HRTF set to the individual listener provides the listener with listening sensations similar to that which the listener, as an individual, would experience when listening to multiple loudspeakers placed throughout the room. An appropriate transfer function applied to the right and left channel output allows the sensation of open-ear listening to be experienced through closed-ear headphones.

Abstract translation: 方法和设备处理多声道音频信号，每个声道对应于放置在房间中特定位置的扬声器，以便通过耳机产生放置在整个房间中的多个“幻影”扬声器的感觉。 头部相关传输函数（HRTF）根据每个预期的扬声器相对于收听者的高程和方位来选择，每个通道用HRTF滤波，以便当组合成左右声道并通过耳机播放时，听众感觉到 声音实际上是通过放置在“虚拟”房间的幻影扬声器产生的。 来自多个人的HRTF系数集合的数据库集合以及随后的最佳HRTF集合与个体听众的随后匹配为聆听者提供了类似于收听者作为个体听到多个扬声器的聆听感觉 房间。 适用于右通道和左声道输出的适当传递功能允许通过闭耳式耳机体验开耳式聆听的感觉。