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    • 4. 发明申请
    • BLIND SOURCE SEPARATION BASED SPATIAL FILTERING
    • 基于盲源分离的空间滤波
    • WO2012158340A1
    • 2012-11-22
    • PCT/US2012/035999
    • 2012-05-01
    • QUALCOMM INCORPORATEDVISSER, ErikKIM, Lae-HoonXIANG, Pei
    • VISSER, ErikKIM, Lae-HoonXIANG, Pei
    • H04S1/00H04S7/00
    • H04S1/007H04S7/301H04S7/303H04S2420/01
    • A method for blind source separation based spatial filtering on an electronic device includes obtaining a first source audio signal and a second source audio signal. The method also includes applying a blind source separation filter set to the first source audio signal and to the second source audio signal to produce a spatially filtered first audio signal and a spatially filtered second audio signal. The method further includes playing the spatially filtered first audio signal over a first speaker to produce an acoustic spatially filtered first audio signal and playing the spatially filtered second audio signal over a second speaker to produce an acoustic spatially filtered second audio signal. The acoustic spatially filtered first audio signal and the acoustic spatially filtered second audio signal produce an isolated acoustic first source audio signal at a first position and an isolated acoustic second source audio signal at a second position.
    • 一种用于在电子设备上进行基于盲源分离的空间滤波的方法包括获得第一源音频信号和第二源音频信号。 该方法还包括将盲源分离滤波器组应用于第一源音频信号和第二源音频信号以产生经空间滤波的第一音频信号和经空间滤波的第二音频信号。 该方法还包括通过第一扬声器播放经空间滤波的第一音频信号以产生声学空间滤波的第一音频信号,并通过第二扬声器播放经空间滤波的第二音频信号,以产生声学空间滤波的第二音频信号。 声空间滤波的第一音频信号和声学空间滤波的第二音频信号在第一位置处产生隔离的声学第一源音频信号,并在第二位置处产生隔离的声学第二源音频信号。
    • 7. 发明申请
    • M-S STEREO REPRODUCTION AT A DEVICE
    • M-S立体声再现在设备上
    • WO2011017124A2
    • 2011-02-10
    • PCT/US2010/043435
    • 2010-07-27
    • QUALCOMM INCORPORATEDXIANG, PeiHEIMBIGNER, Wade L.
    • XIANG, PeiHEIMBIGNER, Wade L.
    • H04S5/00
    • H04S5/00H04R2499/11H04S1/002H04S1/007
    • Mid-side (M-S) encoded audio is reproduced by a device that includes a multi-channel digital-to-analog converter (DAC). The DAC has a first channel input receiving a digitized mid audio signal, a first channel output providing an analog mid audio signal, a second channel input receiving a digitized side audio signal and a second channel output providing an analog side audio signal. The DAC may also include a third channel for receiving a digitized second side audio signal. The second side audio signal is phase inverted. The device may be a handheld wireless communication device, such as a cellular phone, and may also include transducers for outputting M-S encoded sound in response to the analog mid and side audio signals.
    • 中端(M-S)编码音频由包括多通道数/模转换器(DAC)的装置再现。 DAC具有接收数字化中音频信号的第一声道输入,提供模拟中音频信号的第一声道输出,接收数字化侧音频信号的第二声道输入和提供模拟侧音频信号的第二声道输出。 DAC还可以包括用于接收数字化的第二侧音频信号的第三通道。 第二侧音频信号是相位反相的。 该设备可以是诸如蜂窝电话的手持无线通信设备,并且还可以包括用于响应于模拟中间和侧面音频信号而输出M-S编码声音的换能器。
    • 8. 发明申请
    • AUTOMATIC VOLUME AND DYNAMIC RANGE ADJUSTMENT FOR MOBILE AUDIO DEVICES
    • 自动音量和动态范围调整移动音频设备
    • WO2008134689A1
    • 2008-11-06
    • PCT/US2008/061947
    • 2008-04-30
    • QUALCOMM IncorporatedXIANG, PeiWANG, SongKULKARNI, Prajakt VGUPTA, Samir KumarCHOY, Eddie L.t.
    • XIANG, PeiWANG, SongKULKARNI, Prajakt VGUPTA, Samir KumarCHOY, Eddie L.t.
    • H03G3/32H04M1/60
    • H03G7/007H03G3/32H04M1/6016
    • A mobile audio device (for example, a cellular telephone, personal digital audio player, or MP3 player) performs Audio Dynamic Range Control (ADRC) (125) and Automatic Volume Control (AVC) (126) to increase the volume of sound (127) emitted from a speaker of' the mobile audio device so that faint passages of the audio will be more audible. This amplification of faint passages occurs without overly amplifying other louder passages, and without substantial distortion due to clipping. Multi-Microphone Active Noise Cancellation (MMANC) (133) functionality is, for example, used to remove background noise from audio information picked up on microphones of the mobile audio device. The noise-canceled audio may then be communicated from the device. The MMANC functionality generates a noise reference signal as an intermediate signal. The intermediate signal is conditioned and then used as a reference by the AVC process. The gain applied during the AVC process is a function of the noise reference signal.
    • 移动音频设备(例如,蜂窝电话,个人数字音频播放器或MP3播放器)执行音频动态范围控制(ADRC)(125)和自动音量控制(AVC)(126)以增加声音音量(127 )从“移动音频设备”的扬声器发出,使得音频的微弱通道更可听见。 这种微弱通道的放大发生,而不会过度放大其他更大的通道,并且没有由于限幅导致的实质性变形。 例如,多麦克风有源噪声消除(MMANC)(133)功能用于从移动音频设备的麦克风拾取的音频信息中去除背景噪声。 然后可以从设备传送噪声消除的音频。 MMANC功能产生噪声参考信号作为中间信号。 中间信号被调节,然后用作AVC处理的参考。 在AVC过程中应用的增益是噪声参考信号的函数。