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1. 发明申请

WO2010070016A1 METHOD AND APPARATUS FOR APPLYING REVERB TO A MULTI-CHANNEL AUDIO SIGNAL USING SPATIAL CUE PARAMETERS 审中-公开
标题翻译：使用空间参考参数将多个通道音频信号应用于反向信号的方法和装置
公开(公告)号：WO2010070016A1
公开(公告)日：2010-06-24
申请号：PCT/EP2009/067350
申请日：2009-12-16
申请人： DOLBY SWEDEN AB , ENGDEGÅRD, Jonas
发明人： ENGDEGÅRD, Jonas
IPC分类号： G10L19/00 , H04S3/00
CPC分类号： G10L19/008 , H04S7/305
摘要： A method and system for applying reverb to an M-channel downmixed audio input signal indicative of X individual audio channels, where X is greater than M. Typically, the method includes steps of : in response to spatial cue parameters indicative of spatial image of the downmixed input signal, generating Y discrete reverb channel signals, where each of the reverb channel signals at a time, t, is a linear combination of at least a subset of values of the individual audio channels at the time, t, and individually applying reverb to each of at least two of the reverb channel signals, thereby generating Y reverbed channel signals. Preferably, the reverb applied to at least one of the channel signals has a different reverb impulse response than does the reverb applied to at least one other one of the channel signals., t, is a linear combination of at least a subset of values of the individual audio channels at the time, t, and individually applying reverb to each of at least two of the reverb channel signals, thereby generating Y reverbed channel signals. Preferably, the reverb applied to at least one of the channel signals has a different reverb impulse response than does the reverb applied to at least one other one of the channel signals.
摘要翻译：一种用于将混响应用于指示X个独立音频通道的M通道下混音频输入信号的方法和系统，其中X大于M.通常，该方法包括以下步骤：响应于指示空间图像的空间提示参数产生Y离散混响通道信号，其中时间t的每个混响信道信号是时间t上各个音频通道的值的至少一个子集的线性组合，并且分别应用混响至少两个混响通道信号中的每一个，从而产生Y个回波通道信号。优选地，应用于至少一个信道信号的混响具有与应用于至少另一个信道信号的混响相比的不同的混响脉冲响应，t是至少一个子集的值的线性组合各个音频通道在t时刻，并且分别对混响通道信号中的至少两个混响施加混响，从而产生Y回扫频道信号。优选地，应用于至少一个信道信号的混响具有与应用于至少另一个信道信号的混响不同的混响脉冲响应。

2. 发明申请

WO2003007656A1 EFFICIENT AND SCALABLE PARAMETRIC STEREO CODING FOR LOW BITRATE APPLICATIONS 审中-公开
标题翻译：低成本应用的高效和可扩展参数立体声编码
公开(公告)号：WO2003007656A1
公开(公告)日：2003-01-23
申请号：PCT/SE2002/001372
申请日：2002-07-10
申请人： CODING TECHNOLOGIES SWEDEN AB , HENN, Fredrik , KJÖRLING, Kristofer , LILJERYD, Lars Gustaf , RÖDÉN, Jonas , ENGDEGÅRD, Jonas
发明人： HENN, Fredrik , KJÖRLING, Kristofer , LILJERYD, Lars Gustaf , RÖDÉN, Jonas , ENGDEGÅRD, Jonas
IPC分类号： H04S5/00
CPC分类号： G10L19/24 , G10L19/008 , G10L19/0204 , H04S1/007 , H04S3/002
摘要： The present invention provides improvements to prior art audio codecs that generate a stereo-illusion through post-processing of a received mono signal. These improvements are accomplished by extraction of stereo-image describing parameters at the encoder side, which are transmitted and subsequently used for control of a stereo generator at the decoder side. Furthermore, the invention bridges the gap between simple pseudo-stereo methods, and current methods of true stereo-coding, by using a new form of parametric stereo coding. A stereo-balance parameter is introduced, which enables more advanced stereo modes, and in addition forms the basis of a new method of stereo-coding of spectral envelopes, of particular use in systems where guided HFR (High Frequency Reconstruction) is employed. As a special case, the application of this stereo-coding scheme in scalable HFR-based codecs is described.
摘要翻译：本发明提供对现有技术的音频编解码器的改进，其通过对接收到的单声道信号的后处理来产生立体幻象。这些改进通过提取在编码器侧描述参数的立体图像来实现，其被传输并随后用于在解码器侧对立体声发生器的控制。此外，本发明通过使用新形式的参数立体声编码来弥合简单伪立体声方法和真正的立体声编码的现有方法之间的差距。引入立体声平衡参数，其实现更高级的立体声模式，并且还构成了频谱包络的立体编码的新方法的基础，在采用引导HFR（高频重建）的系统中特别有用。作为特殊情况，描述了这种立体声编码方案在可扩展的基于HFR的编解码器中的应用。

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