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    • 4. 发明申请
    • PREDICTIVE VIDEO CODER WITH LOW POWER REFERENCE PICTURE TRANSFORMATION
    • 具有低功率参考图像转换的预测视频编码器
    • US20130329799A1
    • 2013-12-12
    • US13755928
    • 2013-01-31
    • Yao-Chung LinXiaosong ZhouHsi-Jung WuDouglas Scott PriceChris Y. ChungDazhong Zhang
    • Yao-Chung LinXiaosong ZhouHsi-Jung WuDouglas Scott PriceChris Y. ChungDazhong Zhang
    • H04N7/26
    • H04N19/51H04N19/503
    • Video coders may perform perspective transformation of reference frames during coding in a manner that conserves processing resources. When a new input frame is available for coding, a camera position for the input frame may be estimated. A video coder may search for reference pictures having similar camera positions as the position of the input frame and, for each reference picture identified, the video coder may perform a prediction search to identify a reference picture that is the best prediction match for the input frame. Once the video coder identifies a reference picture to serve as a prediction source for the input frame, the video coder may derive a transform to match the reference frame data to the input frame data and may transform the reference picture accordingly. The video coder may code the input frame using the transformed reference picture as a prediction reference and may transmit coded frame data and the camera position of the input frame to a decoder. Thus, the video coder may perform derivation and execution of transforms on a limited basis which conserves system resources.
    • 视频编码器可以在编码期间以保存处理资源的方式执行参考帧的透视变换。 当新的输入帧可用于编码时,可以估计用于输入帧的摄像机位置。 视频编码器可以搜索具有与输入帧的位置相似的相机位置的参考图像,并且对于识别的每个参考图像,视频编码器可以执行预测搜索以识别作为输入帧的最佳预测匹配的参考图像 。 一旦视频编码器识别用作输入帧的预测源的参考图像,则视频编码器可以导出将参考帧数据与输入帧数据相匹配的变换,并且可以相应地变换参考图像。 视频编码器可以使用变换的参考图片作为预测参考来对输入帧进行编码,并且可以将编码的帧数据和输入帧的摄像机位置发送到解码器。 因此,视频编码器可以在有限的基础上进行变换的推导和执行,从而节省系统资源。