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    Fractional quantization step sizes for high bit rates
    1.
    发明授权
    Fractional quantization step sizes for high bit rates 有权
    高比特率的分数量化步长

    公开(公告)号：US08218624B2

    公开(公告)日：2012-07-10

    申请号：US10893167

    申请日：2004-07-17

    申请人： Thomas W. Holcomb ,  Sridhar Srinivasan ,  Pohsiang Hsu ,  Chih-Lung Lin

    发明人： Thomas W. Holcomb ,  Sridhar Srinivasan ,  Pohsiang Hsu ,  Chih-Lung Lin

    IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04

    CPC分类号： H04N19/17 ,  H04N19/124 ,  H04N19/126 ,  H04N19/136 ,  H04N19/137 ,  H04N19/176 ,  H04N19/18 ,  H04N19/46 ,  H04N19/61 ,  H04N19/70

    摘要： At high bit rates, the reconstruction error of compressed video is generally proportional to the squared value of quantization step size, such that full quantization step size increments at high bit rates can lead to significant change in the reconstruction error and/or bit rate of the compressed video. A video codec uses fractional increments of quantization step size at high bit rates to permit a more continuous variation of quality and/or bit rate as the quantization scale changes. For high bit rate scenarios, the bit stream syntax includes an additional syntax element to specify fractional step increments (e.g., half step) of the normal quantizer scale step sizes.

    摘要翻译： 在高比特率下，压缩视频的重构误差通常与量化步长的平方值成比例，使得在高比特率下的全量化步长增加可导致重构误差和/或比特率的显着变化 压缩视频。 视频编解码器以高比特率使用量化步长的分数增量，以允许质量和/或比特率随着量化比例的变化而更连续地变化。 对于高比特率场景，比特流语法包括额外的语法元素，用于指定正常量化器缩放步长的分数阶增量（例如，半步长）。

    Efficient repeat padding for hybrid video sequence with arbitrary video resolution
    2.
    发明授权
    Efficient repeat padding for hybrid video sequence with arbitrary video resolution 有权
    用于具有任意视频分辨率的混合视频序列的高效重复填充

    公开(公告)号：US07822123B2

    公开(公告)日：2010-10-26

    申请号：US10960384

    申请日：2004-10-06

    申请人： Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan ,  Thomas W. Holcomb

    发明人： Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan ,  Thomas W. Holcomb

    IPC分类号： H04N7/12

    CPC分类号： H04N19/59 ,  H04N19/102 ,  H04N19/119 ,  H04N19/16 ,  H04N19/172 ,  H04N19/176 ,  H04N19/46 ,  H04N19/563 ,  H04N19/61 ,  H04N19/70

    摘要： A video codec provides efficient repeat padding of hybrid video sequences having arbitrary video resolution. The video codec repeat pads to expand the active content of pictures in the video sequence out to meet an adaptive vertical macroblock alignment restriction that varies by picture type. For progressive type pictures, the video codec repeats the last row or horizontal boundary edge of the active content. For interlaced type pictures, the video coded repeats the last two rows (last row of each interlaced field) of the active content. This repeat padding differing by picture type provides a better prediction (lower prediction error residual) for macroblocks in following predicted frames whose motion vector points into the padded region.

    摘要翻译： 视频编解码器提供具有任意视频分辨率的混合视频序列的有效重复填充。 视频编解码器重复播放以扩展视频序列中的图像的活动内容，以满足由图像类型变化的自适应垂直宏块对准限制。 对于渐进式图像，视频编解码器重复活动内容的最后一行或水平边界边缘。 对于隔行扫描型图像，视频编码重复活动内容的最后两行（每个隔行字段的最后一行）。 这种不同于图像类型的重复填充对于其运动向量指向填充区域的后续预测帧中的宏块提供了更好的预测（较低的预测误差残差）。

    Adaptive vertical macroblock alignment for mixed frame video sequences
    4.
    发明授权
    Adaptive vertical macroblock alignment for mixed frame video sequences 有权
    用于混合帧视频序列的自适应垂直宏块对准

    公开(公告)号：US07839933B2

    公开(公告)日：2010-11-23

    申请号：US10960380

    申请日：2004-10-06

    申请人： Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan ,  Thomas W. Holcomb

    发明人： Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan ,  Thomas W. Holcomb

    IPC分类号： H04N7/12 ,  H04N11/02 ,  H04N11/04 ,  H04B1/66

    CPC分类号： H04N19/136 ,  H04N7/012 ,  H04N19/119 ,  H04N19/172

    摘要： A video codec provides for adaptive vertical macroblock alignment of mixed interlaced and progressive video sequences. With adaptive vertical macroblock alignment, a video codec enforces a macroblock alignment height restriction on per picture basis, rather than requiring that all frames in a sequence adhere to a uniform height restriction. The video codec can then apply less padding to progressive and like type pictures that have smaller macroblock alignment increments, than to interlaced type pictures with larger alignment increments, which can save significant compression overhead.

    摘要翻译： 视频编解码器提供混合隔行和逐行视频序列的自适应垂直宏块对准。 利用自适应垂直宏块对准，视频编解码器在每个图像基础上执行宏块对准高度限制，而不是要求序列中的所有帧都符合均匀的高度限制。 然后，视频编解码器可以对具有较小的宏块对准增量的逐行和类似类型的图像施加较少的填充，而不是具有较大对准增量的隔行扫描型图像，这可以节省显着的压缩开销。

    Decoding variable coded resolution video with native range/resolution post-processing operation
    6.
    发明授权
    Decoding variable coded resolution video with native range/resolution post-processing operation 有权
    用原始范围/分辨率后处理操作解码可变编码分辨率视频

    公开(公告)号：US08243820B2

    公开(公告)日：2012-08-14

    申请号：US11118686

    申请日：2005-04-29

    申请人： Thomas W. Holcomb ,  Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan

    发明人： Thomas W. Holcomb ,  Chih-Lung Lin ,  Pohsiang Hsu ,  Sridhar Srinivasan

    IPC分类号： H04N7/12

    CPC分类号： H04N19/59 ,  H04N19/107 ,  H04N19/136 ,  H04N19/152 ,  H04N19/156 ,  H04N19/164 ,  H04N19/174 ,  H04N19/176 ,  H04N19/177 ,  H04N19/179 ,  H04N19/46 ,  H04N19/70 ,  H04N19/80

    摘要： A video codec provides for encoding and decoding pictures of a video sequence at various coded resolutions, such that pictures can be encoded at lower coded resolutions based on bit rate or other constraints while maintaining a consistent display resolution. The video codec further provide for encoding and decoding pictures of the video sequence at ranges lower than that used for display, and then expanding the range after decoding for display. The video codec applies post-processing operations, such as de-blocking, de-ringing, and color conversion, at the native resolution and range of the decoded video, prior to range expansion and upsampling for display.

    摘要翻译： 视频编解码器提供以各种编码分辨率编码和解码视频序列的图像，使得可以在保持一致的显示分辨率的情况下，以比特率或其他约束为基础，以较低的编码分辨率编码图像。 视频编解码器进一步提供对视频序列的图像进行编码和解码，范围低于用于显示的视频序列，然后扩展解码后的范围进行显示。 视频编解码器在范围扩展和上采样显示之前，以解码视频的原始分辨率和范围应用后处理操作，如解块，去声和颜色转换。