Audio encoder for wind and microphone noise reduction in a microphone array system
    118.
    发明授权
    Audio encoder for wind and microphone noise reduction in a microphone array system 有权
    麦克风阵列系统中用于风和麦克风降噪的音频编码器

    公开(公告)号:US09460727B1

    公开(公告)日:2016-10-04

    申请号:US14789683

    申请日:2015-07-01

    Applicant: GoPro, Inc.

    Abstract: An audio system encodes and decodes audio captured by a microphone array system in the presence of wind noise. The encoder encodes the audio signal in a way that includes beamformed audio signal and a “hidden” representation of a non-beamformed audio signal. The hidden signal is produced by modulating the low frequency signal to a high frequency above the audible range. A decoder can then either output the beamformed audio signal or can use the hidden signal to generate a reduced wind noise audio signal that includes the non-beamformed audio in the low frequency range.

    Abstract translation: 音频系统在存在风噪声的情况下对由麦克风阵列系统捕获的音频进行编码和解码。 编码器以包括波束形成的音频信号和非波束形成的音频信号的“隐藏”表示的方式对音频信号进行编码。 通过将低频信号调制到高于可听范围的高频产生隐藏信号。 然后,解码器可以输出波束形成的音频信号,或者可以使用隐藏信号来产生包括低频范围内的非波束成形音频的降低的风噪声音频信号。

    Frame manipulation to reduce rolling shutter artifacts
    120.
    发明授权
    Frame manipulation to reduce rolling shutter artifacts 有权
    框架操作,以减少滚动快门伪影

    公开(公告)号:US09392194B2

    公开(公告)日:2016-07-12

    申请号:US14451437

    申请日:2014-08-05

    Applicant: GoPro, Inc.

    Abstract: An image sensor of a camera system captures an image over an image capture interval of time, and waits a blanking interval of time before capturing an additional image. The captured image is provided to a frame controller, and is buffered until an image signal processor accesses the captured image. The image signal processor processes the accessed image over an image processing interval of time, producing a processed image. The image processing interval of time is selected to be greater than the image capture interval of time, but less than the sum of the image capture interval of time and the blanking interval of time. By reducing the image capture interval of time but maintaining an image processing interval of time, rolling shutter artifacts are beneficially reduced without increasing the processing resources or power required by the image signal processor to process the image.

    Abstract translation: 相机系统的图像传感器通过图像捕获时间间隔拍摄图像,并且在捕获附加图像之前等待消隐间隔时间。 将捕获的图像提供给帧控制器,并且被缓冲直到图像信号处理器访问所捕获的图像。 图像信号处理器在图像处理间隔处理所访问的图像,产生经处理的图像。 图像处理时间间隔选择为大于图像捕获时间间隔,但小于图像捕获间隔时间和消隐间隔时间之和。 通过减小图像捕获时间间隔,但是保持图像处理时间间隔,有利地减少滚动快门伪影,而不增加图像信号处理器处理图像所需的处理资源或功率。

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