公开(公告)号：US08107631B2

公开(公告)日：2012-01-31

申请号：US12196239

申请日：2008-08-21

申请人： Juha Oskari Merimaa ,  Michael M. Goodwin ,  Jean-Marc Jot

发明人： Juha Oskari Merimaa ,  Michael M. Goodwin ,  Jean-Marc Jot

IPC分类号： H04R5/00

CPC分类号： H04S7/30 ,  G10L19/008 ,  H04S3/002

摘要： A method of ambience extraction includes analyzing an input signal to determine the time-dependent and frequency-dependent amount of ambience in the input signal, wherein the amount of ambience is determined based on a signal model and correlation quantities computed from the input signals and wherein the ambience is extracted using a multiplicative time-frequency mask. Another method of ambience extraction includes compensating a bias in the estimation of a short-term cross-correlation coefficient. In addition, systems having various modules for implementing the above methods are disclosed.

摘要翻译： 一种环境提取方法包括分析输入信号以确定输入信号中的时间依赖性和与频率相关的环境量，其中基于从输入信号计算的信号模型和相关量来确定环境量，并且其中 使用乘法时频掩码提取环境。 另一种环境提取方法包括补偿短期互相关系数估计中的偏差。 此外，公开了具有用于实现上述方法的各种模块的系统。

公开(公告)号：US08712061B2

公开(公告)日：2014-04-29

申请号：US12246491

申请日：2008-10-06

申请人： Jean-Marc Jot ,  Martin Walsh ,  Edward Stein ,  Juha Oskari Merimaa ,  Michael M. Goodwin

发明人： Jean-Marc Jot ,  Martin Walsh ,  Edward Stein ,  Juha Oskari Merimaa ,  Michael M. Goodwin

IPC分类号： H04R5/00

CPC分类号： H04S3/02 ,  G10L19/008

摘要： A two-channel phase-amplitude stereo encoding and decoding scheme enabling flexible and spatially accurate interactive 3-D audio reproduction via standard audio-only two-channel transmission. The encoding scheme allows associating a 2-D or 3-D positional localization to each of a plurality of sound sources by use of frequency independent inter-channel phase and amplitude differences. The decoder is based on frequency-domain spatial analysis of 2-D or 3-D directional cues in a two-channel stereo signal and re-synthesis of these cues using any preferred spatialization technique, thereby allowing faithful reproduction of positional audio cues and reverberation or ambient cues over arbitrary multi-channel loudspeaker reproduction formats or over headphones, while preserving source separation despite the intermediate encoding over only two audio channels.

摘要翻译： 双通道相位立体声编码和解码方案，通过标准的仅音频双通道传输实现灵活和空间准确的交互式3-D音频再现。 编码方案允许通过使用频率无关的信道间相位和幅度差来将多维声源中的每一个与二维或三维位置定位相关联。 解码器基于双声道立体声信号中的2-D或3-D方向提示的频域空间分析，并且使用任何优选的空间化技术重新合成这些线索，从而允许忠实地再现位置音频线索和混响 或环境提示超过任意多声道扬声器再现格式或通过耳机，同时保留源分离，尽管中间编码只有两个音频通道。

公开(公告)号：US20090092259A1

公开(公告)日：2009-04-09

申请号：US12246491

申请日：2008-10-06

申请人： Jean-Marc JOT ,  Martin Walsh ,  Edward Stein ,  Juha Oskari Merimaa ,  Michael M. Goodwin

发明人： Jean-Marc JOT ,  Martin Walsh ,  Edward Stein ,  Juha Oskari Merimaa ,  Michael M. Goodwin

IPC分类号： H04R5/00

CPC分类号： H04S3/02 ,  G10L19/008

摘要： A two-channel phase-amplitude stereo encoding and decoding scheme enabling flexible and spatially accurate interactive 3-D audio reproduction via standard audio-only two-channel transmission. The encoding scheme allows associating a 2-D or 3-D positional localization to each of a plurality of sound sources by use of frequency independent inter-channel phase and amplitude differences. The decoder is based on frequency-domain spatial analysis of 2-D or 3-D directional cues in a two-channel stereo signal and re-synthesis of these cues using any preferred spatialization technique, thereby allowing faithful reproduction of positional audio cues and reverberation or ambient cues over arbitrary multi-channel loudspeaker reproduction formats or over headphones, while preserving source separation despite the intermediate encoding over only two audio channels.

摘要翻译： 双通道相位立体声编码和解码方案，通过标准的仅音频双通道传输实现灵活和空间准确的交互式3-D音频再现。 编码方案允许通过使用频率无关的信道间相位和幅度差来将多维声源中的每一个与二维或三维位置定位相关联。 解码器基于双声道立体声信号中的2-D或3-D方向提示的频域空间分析，并且使用任何优选的空间化技术重新合成这些线索，从而允许忠实地再现位置音频线索和混响 或环境提示超过任意多声道扬声器再现格式或通过耳机，同时保留源分离，尽管中间编码只有两个音频通道。