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    • 7. 发明申请
    • REDUCING FLICKER IN THE DISPLAY OF VIDEO STREAMS
    • 在视频流的显示中减少闪光
    • US20100315557A1
    • 2010-12-16
    • US12794942
    • 2010-06-07
    • Manu MathewSoyeb NagoriAkira Osamoto
    • Manu MathewSoyeb NagoriAkira Osamoto
    • H04N5/00
    • H04N19/198H04N19/126H04N19/132H04N19/14H04N19/176H04N19/18H04N19/196H04N19/61
    • Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.
    • 视频流的图像帧被编码,目的是在显示时减少视频流中的闪烁。 在一个实施例中,用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中,用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中,如果图像帧被认为包含高活动性,则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中,在被编码之前,源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。
    • 9. 发明授权
    • Reducing flicker in the display of video streams
    • 降低视频流显示中的闪烁
    • US08582645B2
    • 2013-11-12
    • US12794942
    • 2010-06-07
    • Manu MathewSoyeb NagoriAkira Osamoto
    • Manu MathewSoyeb NagoriAkira Osamoto
    • H04N5/00
    • H04N19/198H04N19/126H04N19/132H04N19/14H04N19/176H04N19/18H04N19/196H04N19/61
    • Image frames of a video stream are encoded with the aim of reducing flicker in the video stream when displayed. In one embodiment, the quantization parameter used to quantize an image frame is capped to be not greater than a quantization parameter used to quantize an immediately previous image frame. In another embodiment, the quantization step size used to quantize a macro-block of an image frame is computed based on the value of a quantization error of a co-located macro-block in an immediately previous image frame. In yet another embodiment, macro-block transform coefficients corresponding to high-frequency components are quantized using relatively higher quantization parameter values if the image frame is deemed to contain high activity. In yet another embodiment, flicker-prone macro-blocks of a source frame are replaced by corresponding best-match macro-blocks of a previous reconstructed frame, prior to being encoded.
    • 视频流的图像帧被编码,目的是在显示时减少视频流中的闪烁。 在一个实施例中,用于量化图像帧的量化参数被限制为不大于用于量化紧接在前的图像帧的量化参数。 在另一个实施例中,用于量化图像帧的宏块的量化步长基于紧邻的前一图像帧中的同位置宏块的量化误差的值来计算。 在另一个实施例中,如果图像帧被认为包含高活动性,则使用相对较高的量化参数值来量化对应于高频分量的宏块变换系数。 在另一个实施例中,在被编码之前,源帧的闪烁容易的宏块被先前重建帧的对应的最佳匹配宏块替代。