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    • 1. 发明授权
    • Method and apparatus for adaptively determining a bit budget for encoding video pictures
    • 用于自适应地确定用于编码视频图像的比特预算的方法和装置
    • US08559501B2
    • 2013-10-15
    • US12308136
    • 2006-06-09
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • H04N7/12
    • H04N19/194H04N19/103H04N19/107H04N19/115H04N19/124H04N19/14H04N19/149H04N19/15H04N19/152H04N19/159H04N19/164H04N19/172H04N19/176H04N19/177H04N19/61
    • When for video coding Intra refresh is used, which inserts Intra coded blocks into previously Inter coded pictures, an efficiently adapted rate control method is required for error resilient video coding. A method for adaptively determining a bit budget for encoding video pictures comprises pre-analyzing each of the pictures of a group of pictures, wherein a relative complexity index is calculated for each picture, allocating bits to the pictures based on their relative complexity index and encoding each of the pictures with the allocated number of bits. The pre-analysis comprises selecting pictures for Intra refresh coding, extracting attention area information from the selected pictures, encoding at least the macroblocks of the attention area using Intra mode, calculating for each picture a complexity index, and calculating from the complexity indices of the pictures of the group a relative complexity index for each picture. Thus, a subjectively better video quality is achieved.
    • 当用于视频编码时,使用内部刷新,其将内部编码块插入到先前的帧间编码图像中,对于错误弹性视频编码需要有效地适应的速率控制方法。 一种用于自适应地确定用于编码视频图像的比特预算的方法包括对一组图像的每个图像进行预分析,其中针对每个图像计算相对复杂度指数,并且基于它们的相对复杂度索引和编码将比特分配给图像 每个图片分配的位数。 预分析包括选择帧内刷新编码的图像,从所选择的图像中提取注意区域信息,至少使用内部模式对关注区域的宏块进行编码,针对每个图像计算复杂度指数,以及根据 组图片为每幅图片的相对复杂性指数。 因此,实现主观上更好的视频质量。
    • 4. 发明授权
    • Method and device for adaptive video presentation
    • 用于自适应视频呈现的方法和装置
    • US08605113B2
    • 2013-12-10
    • US12310461
    • 2007-09-03
    • Zhi Bo ChenXiao Dong GuQu Qing Chen
    • Zhi Bo ChenXiao Dong GuQu Qing Chen
    • G09G5/00
    • G06T3/4092G06F17/30905G11B27/034G11B27/105G11B27/28H04N19/46
    • An adaptive video presentation method for automatically presenting a video with stream-embed information based on content analysis of the video on a smaller display with a limited screen size is provided. The method comprises steps of determining a salient object group containing at least one salient object based on perceptual interest value of macroblocks for each frame of said video, extracting a window having a minimum size containing the salient object group for a scene of the video, characterized in that it further comprises steps of comparing size of the extracted window with the smaller display size; and presenting at least a selected area of the extracted window containing at least a part of the salient object group for the scene on the smaller display in different operation modes based on the result of the comparison steps for different motion mode for the scene of the video.
    • 提供了一种适应性视频呈现方法,用于在具有有限屏幕尺寸的较小显示器上基于视频的内容分析自动呈现具有流嵌入信息的视频。 该方法包括以下步骤:基于所述视频的每个帧的宏块的感知兴趣值来确定包含至少一个显着对象的显着对象组,提取具有包含视频场景的显着对象组的最小尺寸的窗口, 其特征在于,还包括步骤:将所提取的窗口的大小与较小的显示尺寸进行比较; 并且基于用于视频场景的不同运动模式的比较步骤的结果,在不同的操作模式中呈现至少包含提取的窗口的至少一部分用于场景的显着对象组的选定区域 。
    • 6. 发明申请
    • Method and Apparatus for Adaptively Determining a Bit Budget for Encoding Video Pictures
    • 用于自适应地确定用于编码视频图像的位预算的方法和装置
    • US20090279603A1
    • 2009-11-12
    • US12308136
    • 2006-06-09
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • H04N7/26
    • H04N19/194H04N19/103H04N19/107H04N19/115H04N19/124H04N19/14H04N19/149H04N19/15H04N19/152H04N19/159H04N19/164H04N19/172H04N19/176H04N19/177H04N19/61
    • When for video coding Intra refresh is used, which inserts Intra coded blocks into previously Inter coded pictures, an efficiently adapted rate control method is required for error resilient video coding. A method for adaptively determining a bit budget for encoding video pictures comprises pre-analyzing each of the pictures of a group of pictures, wherein a relative complexity index is calculated for each picture, allocating bits to the pictures based on their relative complexity index and encoding each of the pictures with the allocated number of bits. The pre-analysis comprises selecting pictures for Intra refresh coding, extracting attention area information from the selected pictures, encoding at least the macroblocks of the attention area using Intra mode, calculating for each picture a complexity index, and calculating from the complexity indices of the pictures of the group a relative complexity index for each picture. Thus, a subjectively better video quality is achieved.
    • 当用于视频编码时,使用内部刷新,其将内部编码块插入到先前的帧间编码图像中,对于错误弹性视频编码需要有效地适应的速率控制方法。 一种用于自适应地确定用于编码视频图像的比特预算的方法包括对一组图像的每个图像进行预分析,其中针对每个图像计算相对复杂度指数,并且基于它们的相对复杂度索引和编码将比特分配给图像 每个图片分配的位数。 预分析包括选择帧内刷新编码的图像,从所选择的图像中提取注意区域信息,至少使用内部模式对关注区域的宏块进行编码,针对每个图像计算复杂度指数,以及根据 组图片为每幅图片的相对复杂性指数。 因此,实现主观上更好的视频质量。
    • 7. 发明申请
    • METHOD AND APPARATUS FOR ENCODING A FLASH PICTURE OCCURRING IN A VIDEO SEQUENCE, AND FOR DECODING CORRESPONDING DATA FOR A FLASH PICTURE
    • 用于编码在视频序列中发生的闪存图像并用于解码用于闪存图像的对应数据的方法和装置
    • US20090245386A1
    • 2009-10-01
    • US12310459
    • 2006-09-01
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • Qu Qing ChenZhi Bo ChenXiao Dong Gu
    • H04N7/12
    • H04N19/103H04N19/14H04N19/172H04N19/46H04N19/85
    • When video sequences are obtained from e.g. news, interviews, conferences and sports matches, flashlight often appears in the video due to photographing. When encoding the video sequence, the intensity changes a lot so that the motion estimation can not find a well-matching block in a previous picture. Accordingly, the video encoder will encode in intra mode and thereby generate much more bits than for the neighbouring non-flash pictures. According to the invention, not the real flash picture is encoded in the video sequence but an artificial non-flash or de-flashed picture, and some indications and parameters are inserted into the bit stream to model the flash effect. The decoder can regenerate the flash picture by reconstructing the non-flash picture and then adding the flash effect. The number of bits required for coding flash pictures is thereby significantly reduced.
    • 当视频序列从例如 新闻,采访,会议和体育比赛,手电筒经常出现在视频中由于拍摄。 当对视频序列进行编码时,强度变化很大,使得运动估计在前一图像中找不到匹配良好的块。 因此,视频编码器将以帧内模式进行编码,从而生成比相邻的非闪光照片多得多的位。 根据本发明,并不是真实的闪光图像被编码在视频序列中,而是人造非闪光或去闪光的图像,并且一些指示和参数被插入到比特流中以对闪光效果建模。 解码器可以通过重建非闪光照片然后添加闪光灯效果来重新生成闪光灯图像。 因此,闪存图像编码所需的位数显着减少。
    • 8. 发明申请
    • METHOD AND DEVICE FOR ADAPTIVE VIDEO PRESENTATION
    • 用于自适应视频呈现的方法和装置
    • US20090244093A1
    • 2009-10-01
    • US12310461
    • 2007-09-03
    • Zhi Bo ChenXiao Dong GuQu Qing Chen
    • Zhi Bo ChenXiao Dong GuQu Qing Chen
    • G09G5/00
    • G06T3/4092G06F17/30905G11B27/034G11B27/105G11B27/28H04N19/46
    • An adaptive video presentation method for automatically presenting a video with stream-embed information based on content analysis of the video on a smaller display with a limited screen size is provided. The method comprises steps of determining a salient object group containing at least one salient object based on perceptual interest value of macroblocks for each frame of said video, extracting a window having a minimum size containing the salient object group for a scene of the video, characterized in that it further comprises steps of comparing size of the extracted window with the smaller display size; and presenting at least a selected area of the extracted window containing at least a part of the salient object group for the scene on the smaller display in different operation modes based on the result of the comparison steps for different motion mode for the scene of the video.
    • 提供了一种适应性视频呈现方法,用于在具有有限屏幕尺寸的较小显示器上基于视频的内容分析自动呈现具有流嵌入信息的视频。 该方法包括以下步骤:基于所述视频的每个帧的宏块的感知兴趣值来确定包含至少一个显着对象的显着对象组,提取具有包含视频场景的显着对象组的最小尺寸的窗口, 其特征在于,还包括步骤:将所提取的窗口的大小与较小的显示尺寸进行比较; 并且基于用于视频场景的不同运动模式的比较步骤的结果,在不同的操作模式中呈现至少包含提取的窗口的至少一部分用于场景的显着对象组的选定区域 。
    • 10. 发明授权
    • Method and apparatus for adapting a default encoding of a digital video signal during a scene change period
    • 用于在场景变化期间适应数字视频信号的默认编码的方法和装置
    • US08179961B2
    • 2012-05-15
    • US12309336
    • 2006-07-17
    • Zhi Bo ChenXiao Dong GuLi Hua ZhuQu Qing Chen
    • Zhi Bo ChenXiao Dong GuLi Hua ZhuQu Qing Chen
    • H04N7/26H04N11/04
    • H04N19/577H04N19/115H04N19/142H04N19/152H04N19/17H04N19/179H04N19/61H04N19/87
    • The frame following a scene cut is usually coded as an I picture. In CBR encoding, the encoder will try to keep the bit rate constant, which will often cause serious picture quality degradation at scene changes. In VBR encoding, more bits will be allocated to the first frame of the new scene and the bit rate will increase significantly for a short time. Therefore subsequent frames must be coded in ‘skipped’ mode, which will often cause jerk artifacts. According to the invention, in each frame belonging to a scene change period, areas are determined that have different human attention levels. In the frames (n−1, n−2, n−3) located prior to the first new scene frame, to the areas having a lower attention level less bits are assigned than in the default encoding, and in the frames (n, n+1, n+2) located at and after the scene cut the thus saved bits are additionally assigned to the areas having a higher attention level.
    • 场景切割后的帧通常被编码为I图像。 在CBR编码中,编码器将尝试保持比特率恒定,这将导致场景变化导致严重的图像质量下降。 在VBR编码中,更多位将被分配给新场景的第一帧,并且比特率将在短时间内显着增加。 因此,后续帧必须以“跳过”模式进行编码,这通常会引起抖动伪像。 根据本发明,在属于场景变化期间的每个帧中,确定具有不同人的注意力水平的区域。 在位于第一新场景帧之前的帧(n-1,n-2,n-3)中,对于具有较低注意力级别的区域,比在默认编码中分配较少的位,并且在帧(n, n + 1,n + 2)被分配给具有较高关注度的区域。