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    ENHANCED BLIND SOURCE SEPARATION ALGORITHM FOR HIGHLY CORRELATED MIXTURES
    2.
    发明公开
    ENHANCED BLIND SOURCE SEPARATION ALGORITHM FOR HIGHLY CORRELATED MIXTURES 有权
    VERBESSERTER BLINDQUELLEN-SEPARATIONSALGORITHMUSFÜRHOCHKORRELIERTE MISCHUNGEN

    公开(公告)号：EP2245861A1

    公开(公告)日：2010-11-03

    申请号：EP09706217.8

    申请日：2009-01-29

    申请人： QUALCOMM Incorporated

    发明人： WANG, Song ,  RAMAKRISHNAN, Dinesh ,  GUPTA, Samir Kumar ,  CHOY, Eddie L.T.

    IPC分类号： H04R3/00 ,  H04R25/00 ,  G10L21/02

    CPC分类号： G10L21/028 ,  G10L2021/02166 ,  H04R3/005 ,  H04R25/40

    摘要： An enhanced blind source separation technique is provided to improve separation of highly correlated signal mixtures. A beamforming algorithm is used to precondition correlated first and second input signals in order to avoid indeterminacy problems typically associated with blind source separation. The beamforming algorithm may apply spatial filters to the first signal and second signal in order to amplify signals from a first direction while attenuating signals from other directions. Such directionality may serve to amplify a desired speech signal in the first signal and attenuate the desired speech signal from the second signal. Blind source separation is then performed on the beamformer output signals to separate the desired speech signal and the ambient noise and reconstruct an estimate of the desired speech signal. To enhance the operation of the beamformer and/or blind source separation, calibration may be performed at one or more stages.

    摘要翻译： 提供增强的盲源分离技术来改善高度相关的信号混合物的分离。 波束形成算法用于预处理相关的第一和第二输入信号，以避免通常与盲源分离相关联的不确定性问题。 波束形成算法可以对第一信号和第二信号应用空间滤波器，以便在衰减来自其它方向的信号的同时放大来自第一方向的信号。 这样的方向性可以用于在第一信号中放大期望的语音信号，并从第二信号中衰减所需的语音信号。 然后对波束形成器输出信号执行盲源分离，以分离所需的语音信号和环境噪声，并重构所需语音信号的估计。 为了增强波束形成器和/或盲源分离的操作，可以在一个或多个阶段执行校准。

    MIXING TECHNIQUES FOR MIXING AUDIO
    3.
    发明公开
    MIXING TECHNIQUES FOR MIXING AUDIO 审中-公开
    MISCHVERFAHREN ZUR MISCHUNG VON AUDIOINHALTEN

    公开(公告)号：EP2025203A2

    公开(公告)日：2009-02-18

    申请号：EP07797579.5

    申请日：2007-05-18

    申请人： QUALCOMM Incorporated

    发明人： XIANG, Pei ,  CHOY, Eddie L.T. ,  KULKARNI, Prajakt V. ,  GUPTA, Samir Kumar

    IPC分类号： H04S7/00

    CPC分类号： H04S7/30 ,  H04M1/6016 ,  H04M1/72558 ,  H04R2499/11

    摘要： This disclosure describes audio mixing techniques that intelligently combine two or more audio signals into an output signal. The techniques allow audio to be combined, yet create perceptual differentiation between the different audio signals. The result is that a user is able to hear both audio signals in a combined output, but the different audio signals do not perceptually interfere with one another. The techniques are relatively simple to implement and are well suited for radio telephones.

    摘要翻译： 本公开描述了将两个或多个音频信号智能地组合成输出信号的音频混合技术。 这些技术允许音频被组合，但是在不同音频信号之间产生感知差异。 结果是用户能够听到组合输出中的两个音频信号，但是不同的音频信号不会感知到彼此干扰。 这些技术实现起来相对简单，并且非常适合于无线电话。

    POWER EFFICIENT BATCH-FRAME AUDIO DECODING APPARATUS, SYSTEM AND METHOD
    6.
    发明公开
    POWER EFFICIENT BATCH-FRAME AUDIO DECODING APPARATUS, SYSTEM AND METHOD 审中-公开
    ENERGIE-EFFIZIENTE BATCH-FRAME-AUDIODEKODIERUNG

    公开(公告)号：EP2193418A2

    公开(公告)日：2010-06-09

    申请号：EP08799306.9

    申请日：2008-09-08

    申请人： QUALCOMM Incorporated

    发明人： YOO, Heejong ,  KAMATH, Nidish Ramachandra ,  CHOY, Eddie L.T. ,  JOHN, Johnny Kallacheril ,  GUPTA, Samir Kumar

    IPC分类号： G06F1/32 ,  G06F3/16 ,  G06F5/06 ,  H04W52/02 ,  G10L19/14

    CPC分类号： G10L19/16 ,  G06F1/3203 ,  G06F3/162 ,  H04W52/0274

    摘要： Power savings in a mobile device is accomplished by generating audio samples by decoding a bitstream with a decoding system within the mobile device. The generated audio samples are transferred into at least one memory bank in a set of memory banks in a power saver block within the mobile device. Parts of the decoding system not involved in the storing of the generated audio samples are switched off after batch decoding a bitstream associated with multiple audio frames. The bitstream includes bits less than that found in one audio file. At least one of the memory banks in the set of memory banks is power collapsible. The fetching of the decoded by the decoding system can be synchronized with a paging channel of a modem in the mobile device. The transferred audio samples is a lossless compression and may occur after a re-encoding.

    摘要翻译： 移动设备中的功率节省通过使用移动设备内的解码系统对位流进行解码来生成音频样本来实现。 生成的音频样本被传送到移动设备内的节电块中的一组存储体中的至少一个存储体。 在对与多个音频帧相关联的比特流进行批量解码之后，不涉及生成的音频样本的存储的部分解码系统被关闭。 比特流包括比在一个音频文件中发现的比特小的比特。 存储器组中的至少一个存储体是电源可折叠的。 由解码系统解码的获取可以与移动设备中的调制解调器的寻呼信道同步。 传输的音频样本是无损压缩，并且可能在重新编码之后发生。

    ENCODER-ASSISTED FRAME LOSS CONCEALMENT TECHNIQUES FOR AUDIO CODING
    7.
    发明授权
    ENCODER-ASSISTED FRAME LOSS CONCEALMENT TECHNIQUES FOR AUDIO CODING 有权
    KODIERERGESTÜTZTE帧丢失绕过方法用于音频编码

    公开(公告)号：EP1941500B1

    公开(公告)日：2011-02-23

    申请号：EP06846154.0

    申请日：2006-10-25

    申请人： QUALCOMM Incorporated

    发明人： RYU, Sang-Uk c7o QUALCOMM Incorporated ,  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.

    DIGITAL DOMAIN SAMPLING RATE CONVERTER
    8.
    发明公开
    DIGITAL DOMAIN SAMPLING RATE CONVERTER 审中-公开
    数字域采样频率转换器

    公开(公告)号：EP1985016A2

    公开(公告)日：2008-10-29

    申请号：EP07757066.1

    申请日：2007-02-15

    申请人： QUALCOMM Incorporated

    发明人： WANG, Song ,  CHOY, Eddie L.T. ,  KULKAMI, Prajakt, V. ,  GUPTA, Samir, Kumar

    IPC分类号： H03H17/06

    CPC分类号： H03H17/0685 ,  H03H17/0294

    摘要： Techniques are described for sampling rate conversion in the digital domain by up-sampling and down-sampling a digital signal according to a selected intermediate sampling frequency. A prototype anti-aliasing filter that has a bandwidth with multiple factors is stored in memory. The techniques include selecting an intermediate sampling frequency to be an integer multiple of a desired output sampling frequency of a digital signal based on the factors of the prototype filter, and selecting a down-sampling factor to be the same integer associated with the selected intermediate sampling frequency. A filter generator generates an anti-aliasing filter for the selected down-sampling factor based on the prototype filter. A sampling rate converter up-samples the digital signal at an input sampling frequency to the selected intermediate sampling frequency, filters the digital signal with the derived anti-aliasing filter, and down-samples the digital signal by the selected down-sampling factor to the desired output sampling frequency.

    ENCODER-ASSISTED FRAME LOSS CONCEALMENT TECHNIQUES FOR AUDIO CODING
    9.
    发明公开
    ENCODER-ASSISTED FRAME LOSS CONCEALMENT TECHNIQUES FOR AUDIO CODING 有权
    KODIERERGESTÜTZTE帧丢失绕过方法用于音频编码

    公开(公告)号：EP1941500A1

    公开(公告)日：2008-07-09

    申请号：EP06846154.0

    申请日：2006-10-25

    申请人： QUALCOMM Incorporated

    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.