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    • 93. 发明申请
    • Transcoding videos based on different transformation kernels
    • 基于不同的转换内核转码视频
    • US20050265445A1
    • 2005-12-01
    • US10858109
    • 2004-06-01
    • Jun XinAnthony VetroHuifang Sun
    • Jun XinAnthony VetroHuifang Sun
    • G06F17/14H04N7/26H04N7/30H04N7/50H04N7/12
    • H04N19/40H04N19/60H04N19/61
    • A method and system transcodes an input video based on a first transformation kernel to an output video based on a second transformation kernel. The first and second transformation kernels are different, and the transcoding is performed entirely in a transform-domain. Coefficients of a single transform kernel matrix are determined. Then, input coefficients of the input video are converted to output coefficients of the output video using only the single transform kernel matrix. The input video can be based on DCT coefficients, and the output video can be based on HT coefficients. Alternatively, the input video can be based on HT coefficients, and the output video can be based on DCT coefficients. In addition, the ouput video can have a reduced a spatial resolution from the input video.
    • 一种方法和系统将基于第一变换内核的输入视频转码为基于第二变换内核的输出视频。 第一和第二变换内核是不同的,并且代码转换完全在变换域中执行。 确定单个变换核心矩阵的系数。 然后,输入视频的输入系数仅使用单个变换核心矩阵转换为输出视频的输出系数。 输入视频可以基于DCT系数,并且输出视频可以基于HT系数。 或者,输入视频可以基于HT系数,并且输出视频可以基于DCT系数。 另外,输出视频可以从输入视频减少空间分辨率。