公开(公告)号：US20070009120A1

公开(公告)日：2007-01-11

申请号：US11450155

申请日：2006-06-08

申请人： V. Algazi ,  Richard Duda ,  Dennis Thompson

发明人： V. Algazi ,  Richard Duda ,  Dennis Thompson

IPC分类号： H04R5/02

CPC分类号： H04R5/027 ,  H04S7/304 ,  H04S2400/15

摘要： A new approach to capturing and reproducing either live or recorded three-dimensional sound is described. Called MTB2.5 for “Motion-Tracked Binaural 2.5,” the method employs six real or simulated microphones, a head tracker, and special signal-processing procedures to combine the signals picked up by the microphones. In the microphone array, two central microphones are placed at the positions of the ears of a listener facing forward, and four peripheral microphones are located in pairs on either side of the central microphones. Only the low-frequency components of the four peripheral microphone signals are needed, and the total bandwidth required is approximately 2.5 times the bandwidth of one full-bandwidth audio channel. MTB2.5 achieves a high degree of realism by effectively placing the listener's ears in the space where the sounds are occurring, moving the virtual ears in synchrony with the listener's head motions. MTB2.5 also provides a universal format for recording spatial sound.

摘要翻译： 描述了捕获和再现现场或录制三维声音的新方法。 称为“运动跟踪双耳2.5”的MTB2.5，该方法采用六个实际或模拟麦克风，头部跟踪器和特殊的信号处理程序来组合由麦克风拾取的信号。 在麦克风阵列中，两个中央麦克风放置在收听者的耳朵朝向前方的位置，四个外围麦克风成对地位于中央麦克风的两侧。 只需要四个外围麦克风信号的低频分量，所需的总带宽约为一个全带宽音频通道带宽的2.5倍。 MTB2.5通过有效地将聆听者的耳朵放置在声音发生的空间中，实现了高度的现实感，与听者的头部动作同步移动虚拟耳朵。 MTB2.5还提供了用于记录空间声音的通用格式。

公开(公告)号：US20080056517A1

公开(公告)日：2008-03-06

申请号：US11845607

申请日：2007-08-27

申请人： V. Algazi ,  Richard Duda ,  Dennis Thompson

发明人： V. Algazi ,  Richard Duda ,  Dennis Thompson

IPC分类号： H04S1/00

CPC分类号： H04S7/304 ,  H04R5/027 ,  H04R2201/401 ,  H04R2201/405 ,  H04R2420/07 ,  H04S2400/01 ,  H04S2400/15

摘要： A new approach to tracking head motion for headphone-based sound is described. Called MTB2.0 for “Motion-Tracked Binaural with 2 Channels”, the method may be used for any 2-channel binaural signals without any increase in the bandwidth requirement. MTB2.0 provides a simple and effective means to improve the quality of headphone-based sound reproduction by sensing the orientation of the listener's head and using the sensed orientation to appropriately modify the signals sent to the two ears. MTB2.0 method increases the realism and removes some of the shortcomings of binaural sound capture and recording, as well as improves the quality of binaural rendering of stereo.

摘要翻译： 描述了基于耳机的声音跟踪头部运动的新方法。 称为MTB2.0“运动跟踪双耳双通道”，该方法可用于任何2通道双耳信号，而不增加带宽要求。 MTB2.0提供了一种简单而有效的手段，通过感应听者头部的方位和使用感测方向来适当地修改发送到两只耳朵的信号来提高基于耳机的声音再现质量。 MTB2.0方法增加了现实主义，消除了双耳声音捕获和记录的一些缺点，并提高了立体声的双耳渲染质量。