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    • 3. 发明授权
    • Method and device for encoding image data with a predetermined compression rate in one pass
    • 一次通过以预定的压缩率编码图像数据的方法和装置
    • US08031953B2
    • 2011-10-04
    • US11874331
    • 2007-10-18
    • Fang-Chen Chang
    • Fang-Chen Chang
    • G06K9/46
    • H04N19/152H04N19/115H04N19/149H04N19/176
    • An encoding method to encode image data comprising a sequence of blocks with a predetermined compression rate in one pass is disclosed. The blocks are divided into two sets, a first set and a second set. The blocks in the first set are encoded within the sum of an available bit length and a predetermined lending bit length. The blocks are encoded in the second set within the available bit length. A lending bit length is updated when the current bit length is larger than the available bit length. The left bit length is updated when the current bit length is not larger than the available bit length. The left bit length and the lending bit length are adjusted when the current block is in the second set, the lending bit length is positive and the left bit length is larger than a predetermined threshold.
    • 公开了一种在一次通过中以预定的压缩率编码包括块序列的图像数据的编码方法。 块被分成两组,第一组和第二组。 第一组中的块在可用比特长度和预定的借位比特长度之和内编码。 块在可用位长度内在第二组中编码。 当当前位长度大于可用位长度时,更新借位位长度。 当当前位长度不大于可用位长度时,左位长度被更新。 当当前块位于第二组中时,左位长度和借位位长度被调整,借位位长度为正,左位长度大于预定阈值。
    • 4. 发明授权
    • De-interlacing method and apparatus
    • 去隔行方法和装置
    • US08013936B2
    • 2011-09-06
    • US11819062
    • 2007-06-25
    • Fang-Chen Chang
    • Fang-Chen Chang
    • H04N7/01
    • H04N7/012H04N7/0142
    • A de-interlacing method is applied to a to-be-de-interlaced field including display pixels of display lines and to-be-interpolated pixels of to-be-interpolated lines. First, a corresponding edge-direction value of each of edge pixels in the to-be-de-interlaced field is determined. Next, it is judged whether one of the display pixels near each to-be-interpolated pixel has a corresponding edge-direction value so that a judgement result is obtained. Then, a corresponding edge-direction value of each to-be-interpolated pixel is set according to the corresponding edge-direction values of specific display pixels of the display pixels near the to-be-interpolated pixel if the judgement result is affirmative. Finally, a corresponding display pixel pair of up and down display lines near each to-be-interpolated pixel is selected according to the corresponding edge-direction value of each to-be-interpolated pixel so that a luminance value and a chrominance value of the to-be-interpolated pixel are calculated.
    • 去隔行扫描方法被应用于包括显示行的显示像素和待插入线的待内插像素的去隔行场。 首先,确定待去隔行扫描场中的每个边缘像素的相应边缘方向值。 接下来,判断每个待内插像素附近的显示像素之一是否具有对应的边缘方向值,从而获得判断结果。 然后,如果判断结果是肯定的,则根据待被内插像素附近的显示像素的特定显示像素的相应边缘方向值来设置每个待插值像素的相应边缘方向值。 最后,根据每个待内插像素的对应边缘方向值选择每个待插值像素附近的对应的显示像素对的上下显示线,使得亮度值和色差值 计算待内插像素。
    • 9. 发明申请
    • System and method for 3-D recursive search motion estimation
    • 3-D递归搜索运动估计的系统和方法
    • US20080232642A1
    • 2008-09-25
    • US11723488
    • 2007-03-20
    • Fang-Chen Chang
    • Fang-Chen Chang
    • G06K9/00
    • H04N5/145G06T7/223
    • A method for 3-D recursive search motion estimation is provided to estimate a motion vector for a current block in a current frame. The method includes the following steps. First, provide a spatial prediction by selecting at least one motion vector for at least one neighboring block in the current frame. Then, provide a temporal prediction. After that, estimate the motion vector for the current block based on the spatial prediction and the temporal prediction. The temporal prediction is obtained by selecting at least one most frequent motion vector from a plurality of motion vectors for a plurality of blocks in a corresponding region of a previous frame, wherein the corresponding block encloses a previous block which is location corresponding to the current block in the current frame.
    • 提供了一种用于3-D递归搜索运动估计的方法来估计当前帧中的当前块的运动矢量。 该方法包括以下步骤。 首先,通过为当前帧中的至少一个相邻块选择至少一个运动矢量来提供空间预测。 然后,提供时间预测。 之后,基于空间预测和时间预测估计当前块的运动矢量。 通过从先前帧的对应区域中的多个块的多个运动矢量中选择至少一个最常用的运动矢量来获得时间预测,其中对应的块包围与当前块相对应的位置的先前块 在当前的框架。
    • 10. 发明申请
    • Determination method of edge direction
    • 边缘方向的确定方法
    • US20080218528A1
    • 2008-09-11
    • US11902298
    • 2007-09-20
    • Fang-Chen Chang
    • Fang-Chen Chang
    • G09G5/00G06K9/48
    • G06K9/4604
    • An edge direction determination method for a pixel of a display picture. The display picture has a corresponding edge map. The pixel has corresponding pixel direction pairs. First, in step (a), it is judged whether the pixel is an edge pixel according to the edge map. Next, in step (b), it is judged whether the pixel has a right-inclined edge direction or a left-inclined edge direction when the pixel is the edge pixel. Then, in step (c), the edge direction of the pixel is determined according to specific pixel direction pairs corresponding to the same inclined edge direction if a judged result in step (b) is affirmative. Finally, in step (d), if the judged result in step (b) is negative, it is judged whether the pixel has a horizontal edge direction or a vertical edge direction.
    • 一种用于显示图像的像素的边缘方向确定方法。 显示画面具有相应的边缘图。 像素具有对应的像素方向对。 首先,在步骤(a)中,根据边缘图判断像素是否为边缘像素。 接下来,在步骤(b)中,当像素是边缘像素时,判断像素是否具有右倾斜边缘方向或左倾斜边缘方向。 然后,在步骤(c)中,如果步骤(b)的判断结果是肯定的,则根据与相同倾斜边缘方向对应的特定像素方向对,确定像素的边缘方向。 最后,在步骤(d)中,如果步骤(b)中的判断结果为否定,则判断像素是水平边缘方向还是垂直方向。