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11. 发明申请

WO2009012475A1 UNIFIED FILTER BANK FOR PERFORMING SIGNAL CONVERSIONS 审中-公开
标题翻译：用于执行信号转换的统一过滤器银行
公开(公告)号：WO2009012475A1
公开(公告)日：2009-01-22
申请号：PCT/US2008/070549
申请日：2008-07-18
申请人： QUALCOMM Incorporated , RYU, Sang-Uk , CHOY, Eddie, L.T. , KAMATH, Nidish, Ramachandra , GUPTA, Samir, Kumar , DEVALAPALLI, Suresh
发明人： RYU, Sang-Uk , CHOY, Eddie, L.T. , KAMATH, Nidish, Ramachandra , GUPTA, Samir, Kumar , DEVALAPALLI, Suresh
IPC分类号： G10L19/14 , G10L19/02
CPC分类号： G10L19/16 , G10L19/0212
摘要： A unified filter bank for performing signal conversions may include an interface that receives signal conversion commands in relation to multiple types of compressed audio bitstreams. The unified filter bank may also include a reconfigurable transform component that performs a transform as part of signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include complementary modules that perform complementary processing as part of the signal conversion for the multiple types of compressed audio bitstreams. The unified filter bank may also include an interface command controller that controls the configuration of the reconfigurable transform component and the complementary modules.
摘要翻译：用于执行信号转换的统一滤波器组可以包括接收关于多种类型的压缩音频位流的信号转换命令的接口。统一的滤波器组还可以包括可重新配置的变换组件，其执行作为多种类型的压缩音频位流的信号转换的一部分的变换。统一的滤波器组还可以包括作为多种类型的压缩音频比特流的信号转换的一部分执行补充处理的互补模块。统一的滤波器组还可以包括控制可重构变换部件和互补模块的配置的接口命令控制器。

12. 发明申请

WO2007130797A1 ENHANCEMENT TECHNIQUES FOR BLIND SOURCE SEPARATION (BSS) 审中-公开
标题翻译：盲源分离（BSS）的增强技术
公开(公告)号：WO2007130797A1
公开(公告)日：2007-11-15
申请号：PCT/US2007/067044
申请日：2007-04-20
申请人： QUALCOMM Incorporated , WANG, Song , CHOY, Eddie, L.T. , GUPTA, Samir, Kumar
发明人： WANG, Song , CHOY, Eddie, L.T. , GUPTA, Samir, Kumar
IPC分类号： G10L21/02
CPC分类号： G06K9/6243 , G10L21/0272
摘要： This disclosure describes signal processing techniques that can improve the performance of blind source separation (BSS) techniques. In particular, the described techniques propose pre-processing steps that can help to de-correlate the different signals from one another prior to execution of the BSS techniques. In addition, the described techniques also propose optional post-processing steps that can further de-correlate the different signals following execution of the BSS techniques. The techniques may be particularly useful for improving BSS performance with highly correlated audio signals, e.g., from two microphones that are in close spatial proximity to one another.
摘要翻译：本公开描述了可以提高盲源分离（BSS）技术的性能的信号处理技术。特别地，所描述的技术提出了预处理步骤，其可以有助于在执行BSS技术之前将不同信号彼此相关联。此外，所描述的技术还提出了可选的后处理步骤，其可以在执行BSS技术之后进一步使不同信号去相关。这些技术对于通过高度相关的音频信号（例如来自彼此紧密地空间接近的两个麦克风）来改善BSS性能可能特别有用。

13. 发明申请

WO2007051124A1 ENCODER-ASSISTED FRAME LOSS CONCEALMENT TECHNIQUES FOR AUDIO CODING 审中-公开
标题翻译：用于音频编码的编码器辅助帧丢失隐藏技术
公开(公告)号：WO2007051124A1
公开(公告)日：2007-05-03
申请号：PCT/US2006/060237
申请日：2006-10-25
申请人： QUALCOMM INCORPORATED , RYU, Sang-Uk , CHOY, Eddie L.T. , GUPTA, Samir Kumar
发明人： RYU, Sang-Uk , CHOY, Eddie L.T. , GUPTA, Samir Kumar
IPC分类号： G10L19/00
CPC分类号： G10L19/005 , G10L19/02
摘要： Encoder-assisted frame loss concealment (FLC) techniques for decoding audio signals are described. A decoder may discard an erroneous frame of an audio signal and may implement the encoder-assisted FLC techniques in order to accurately conceal the discarded frame based on neighboring frames and side-information transmitted from the encoder. The encoder-assisted FLC techniques include estimating magnitudes of frequency-domain data for the frame based on frequency-domain data of neighboring frames, and estimating signs of the frequency-domain data based on a subset of signs transmitted from the encoder as side-information. Frequency-domain data for a frame of an audio signal includes tonal components and noise components. Signs estimated from a random signal may be substantially accurate for the noise components of the frequency-domain data. However, to achieve highly accurate sign estimation for the tonal components, the encoder transmits signs for the tonal components of the frequency-domain data as side-information.
摘要翻译：描述了用于解码音频信号的编码器辅助帧丢失隐藏（FLC）技术。解码器可以丢弃音频信号的错误帧，并且可以实现编码器辅助的FLC技术，以便基于相邻帧和从编码器发送的侧信息来准确地隐藏丢弃的帧。编码器辅助FLC技术包括基于相邻帧的频域数据来估计帧的频域数据的幅度，并且基于从编码器发送的符号子集估计频域数据的符号作为侧信息。音频信号的帧的频域数据包括音调分量和噪声分量。从随机信号估计的符号对于频域数据的噪声分量可能是基本准确的。然而，为了实现对音调分量的高度准确的符号估计，编码器将用于频域数据的音调分量的符号作为侧信息发送。

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