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    Method for locally adjusting a quantization step and coding device implementing said method
    91.
    发明授权
    Method for locally adjusting a quantization step and coding device implementing said method 有权
    用于本地调整量化步骤的方法和实现所述方法的编码装置

    公开(公告)号：US08139882B2

    公开(公告)日：2012-03-20

    申请号：US11887860

    申请日：2006-03-16

    申请人： Lila Huguenel ,  Dominique Thoreau ,  Philippe Guillotel

    发明人： Lila Huguenel ,  Dominique Thoreau ,  Philippe Guillotel

    IPC分类号： G06K9/00

    CPC分类号： H04N19/192 ,  H04N19/124 ,  H04N19/152 ,  H04N19/154 ,  H04N19/17 ,  H04N19/179 ,  H04N19/60

    摘要： The invention relates to a method of locally adjusting a quantization step for each region of an image in a sequence of n images. The method comprises the following steps; calculating, for each image of the sequence, a first difference of bits saved on the potential masking region when quantizing it with a first quantization step and a second difference of bits required by the region of interest when quantizing it with a second quantization step; and in each image of the sequence, assigning to the potential masking region the first quantization step and if the sum of the n first differences of bits is higher than the sum of the n second differences of bits assigning said second quantization step to said region of interest and otherwise assigning a third quantization step such that the sum of said n first differences of bits is distributed between the regions of interest according to a reconstruction quality criterion.

    摘要翻译： 本发明涉及一种对n个图像序列中的图像的每个区域进行局部调整量化步长的方法。 该方法包括以下步骤： 对于所述序列的每个图像，对用所述第一量化步长进行量化时的所述潜在屏蔽区域上保存的位的第一差值和当用第二量化步长进行量化时所述感兴趣区域所需的位的第二差值; 并且在所述序列的每个图像中，将所述第一量化步长分配给所述潜在屏蔽区域，并且如果所述n个第一差分比特的和高于将所述第二量化步长分配给所述第二量化步长的所述第n个第二差分的总和 兴趣，否则分配第三量化步骤，使得根据重构质量标准，将所述n个第一差分位的和分配在感兴趣区域之间。

    Device and Method for Creating a Saliency Map of an Image
    92.
    发明申请
    Device and Method for Creating a Saliency Map of an Image 有权
    用于创建图像的显着图的设备和方法

    公开(公告)号：US20080304708A1

    公开(公告)日：2008-12-11

    申请号：US11795001

    申请日：2006-01-10

    申请人： Olivier Le Meur ,  Dominique Thoreau ,  Philippe Salmon ,  Dominique Barba ,  Patrick Le Callet

    发明人： Olivier Le Meur ,  Dominique Thoreau ,  Philippe Salmon ,  Dominique Barba ,  Patrick Le Callet

    IPC分类号： G06K9/36

    CPC分类号： G06K9/4671 ,  G06K9/4623 ,  G06K9/4652 ,  G06K9/629 ,  G06T7/262

    摘要： The invention concerns a method for creating a saliency map of an image. It comprises the steps of an image comprising the step of hierarchical decomposition of the image into frequential sub-bands, According to the invention, the method comprises the steps ofi. movement estimation between the current image and a preceding image calculated from the decomposition into frequential sub-bands, estimating a dominant movement for the image and a local movement for each pixel of the current image,ii. creation of a temporal saliency map obtained from the global and local movement estimation.

    摘要翻译： 本发明涉及一种用于创建图像的显着图的方法。 它包括图像的步骤，该图像包括将图像分层分解为频率子带的步骤。根据本发明，该方法包括以下步骤： ii。当前图像与从分解成频谱子带计算出的前一图像之间的运动估计，估计图像的主要移动和当前图像的每个像素的局部移动。 创建从全局和局部运动估计获得的时间显着图。

    Method of transcoding data from the MPEG2 standard to an MPED4 standard
    93.
    发明申请
    Method of transcoding data from the MPEG2 standard to an MPED4 standard 审中-公开
    将数据从MPEG2标准转码为MPED4标准的方法

    公开(公告)号：US20080137740A1

    公开(公告)日：2008-06-12

    申请号：US11982947

    申请日：2007-11-06

    申请人： Dominique Thoreau ,  Michel Cosmao ,  Christophe Chevance

    发明人： Dominique Thoreau ,  Michel Cosmao ,  Christophe Chevance

    IPC分类号： H04N7/26

    CPC分类号： H04N19/112 ,  H04N19/122 ,  H04N19/176 ,  H04N19/40 ,  H04N19/48 ,  H04N19/61

    摘要： The method is characterized in that, if the data relating to a first macroblock indicates that it is coded in frame prediction and field DCT mode, it comprises the following steps: determination of the second macroblock in the image which, with the first, forms a supermacroblock, each of the macroblocks having an associated MPEG2 inter-frame motion vector, V0 and V1, structuring of the macroblock in field mode and calculation of a partitioning of this supermacroblock according to the MPEG2 motion vectors V0 and V1, calculation of the motion vectors for each of the partitions according to the MPEG2 motion vectors V0 and V1.

    摘要翻译： 该方法的特征在于，如果与第一宏块有关的数据指示它在帧预测和场DCT模式中被编码，则其包括以下步骤：确定图像中的第二宏块，其中第一宏块首先形成 超宏块，每个宏块具有相关联的MPEG2帧间运动向量V 0和V 1，在场模式中构造宏块并计算这个 根据MPEG2运动矢量V 0和V 1的超级宏块根据MPEG2运动矢量V 0 <0>计算每个分区的运动矢量， SUB＆gt;和V 1＆lt; 1＆gt ;.