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    Systems, methods, and computer program products for transform coefficient sub-sampling
    4.
    发明授权
    Systems, methods, and computer program products for transform coefficient sub-sampling 有权
    用于变换系数子采样的系统，方法和计算机程序产品

    公开(公告)号：US09313497B2

    公开(公告)日：2016-04-12

    申请号：US13709780

    申请日：2012-12-10

    Applicant: Intel Corporation

    Inventor： Yi-Jen Chiu ,  Wenhao Zhang ,  Lidong Xu ,  Yu Han ,  Hong Jiang

    IPC: H04N7/12 ,  H04N19/60 ,  H04N19/159 ,  H04N19/176 ,  H04N19/132 ,  H04N19/154 ,  H04N19/48

    CPC classification number: H04N19/60 ,  H04N19/132 ,  H04N19/154 ,  H04N19/159 ,  H04N19/176 ,  H04N19/48

    Abstract: Video compression encoding includes intra and inter prediction to reduce spatial and temporal redundancies in video. Prediction results or residuals represent differences between original video pixel values and predicted pixel values. The prediction residuals may be transformed into coefficients, referred to as transform coefficients, in the frequency domain. The transform coefficients may be quantized and entropy encoded. The transform coefficients can be sub-sampled prior to quantization to reduce their number. For example, sub-sampling may reduce more high frequency components than low frequency components represented in the transform coefficients. Therefore, sub-sampling reduces the number of transform coefficients that need to be quantized, reduces quantization complexity, and correspondingly increases throughput in the encoding.

    Abstract translation: 视频压缩编码包括帧内和帧间预测，以减少视频中的空间和时间冗余。 预测结果或残差表示原始视频像素值与预测像素值之间的差异。 预测残差可以被变换为频域中被称为变换系数的系数。 可以对变换系数进行量化和熵编码。 变换系数可以在量化之前进行子采样以减少它们的数量。 例如，子采样可以减少比变换系数中表示的低频分量更多的高频分量。 因此，子采样减少了需要量化的变换系数的数量，降低了量化复杂度，并且相应地增加了编码中的吞吐量。

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