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    Method of and apparatus for lossless video encoding and decoding
    1.
    发明申请
    Method of and apparatus for lossless video encoding and decoding 失效
    无损视频编码和解码的方法和装置

    公开(公告)号：US20070065026A1

    公开(公告)日：2007-03-22

    申请号：US11516603

    申请日：2006-09-07

    申请人： Yung-lyul Lee ,  Dae-yeon Kim ,  Ki-hun Han ,  Jao-ho Hur

    发明人： Yung-lyul Lee ,  Dae-yeon Kim ,  Ki-hun Han ,  Jao-ho Hur

    IPC分类号： G06K9/36

    CPC分类号： H04N19/12 ,  H04N19/147 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

    摘要： Provided are a method of and apparatus for lossless video encoding and decoding, in which a differential residual block generated by calculating a difference between pixels of a residual block resulting from interprediction is encoded, thereby improving the compression rate. The method of lossless video encoding includes performing interprediction between a reference frame and a current frame in units of a predetermined-size block to generate a predicted block of a current block to be encoded, generating a residual block composed of residual signals corresponding to differences between pixels of the predicted block and the current block, calculating differences between the residual signals of the residual block in a predetermined direction and generating a differential residual block based on the calculated differences, and performing entropy-encoding on the differential residual block.

    摘要翻译： 提供了一种用于无损视频编码和解码的方法和装置，其中通过计算由间隔预测产生的残差块的像素之间的差异而产生的差分残差块被编码，从而提高了压缩率。 无损视频编码的方法包括以预定大小的块为单位执行参考帧和当前帧之间的间隔预测，以产生要编码的当前块的预测块，产生由对应于 计算预测块和当前块的像素，计算在预定方向上的残差块的残差信号之间的差异，并基于计算的差产生差分残差块，并对差分残差块进行熵编码。

    Method of and apparatus for lossless video encoding and decoding
    2.
    发明授权
    Method of and apparatus for lossless video encoding and decoding 失效
    无损视频编码和解码的方法和装置

    公开(公告)号：US07738714B2

    公开(公告)日：2010-06-15

    申请号：US11516603

    申请日：2006-09-07

    申请人： Yung-lyul Lee ,  Dae-yeon Kim ,  Ki-hun Han ,  Jae-ho Hur

    发明人： Yung-lyul Lee ,  Dae-yeon Kim ,  Ki-hun Han ,  Jae-ho Hur

    IPC分类号： G06K9/36

    CPC分类号： H04N19/12 ,  H04N19/147 ,  H04N19/176 ,  H04N19/593 ,  H04N19/61

    摘要： Provided are a method of and apparatus for lossless video encoding and decoding, in which a differential residual block generated by calculating a difference between pixels of a residual block resulting from interprediction is encoded, thereby improving the compression rate. The method of lossless video encoding includes performing interprediction between a reference frame and a current frame in units of a predetermined-size block to generate a predicted block of a current block to be encoded, generating a residual block composed of residual signals corresponding to differences between pixels of the predicted block and the current block, calculating differences between the residual signals of the residual block in a predetermined direction and generating a differential residual block based on the calculated differences, and performing entropy-encoding on the differential residual block.

    摘要翻译： 提供了一种用于无损视频编码和解码的方法和装置，其中通过计算由间隔预测产生的残差块的像素之间的差异而产生的差分残差块被编码，从而提高了压缩率。 无损视频编码的方法包括以预定大小的块为单位执行参考帧和当前帧之间的间隔预测，以产生要编码的当前块的预测块，产生由对应于 计算预测块和当前块的像素，计算在预定方向上的残差块的残差信号之间的差异，并基于计算的差产生差分残差块，并对差分残差块进行熵编码。

    Variable length coding method and apparatus
    5.
    发明授权
    Variable length coding method and apparatus 有权
    可变长度编码方法和装置

    公开(公告)号：US06668094B1

    公开(公告)日：2003-12-23

    申请号：US09631883

    申请日：2000-08-02

    申请人： Kook-yeol Yoo ,  Byung-sun Choi ,  Yung-lyul Lee

    发明人： Kook-yeol Yoo ,  Byung-sun Choi ,  Yung-lyul Lee

    IPC分类号： G06K936

    CPC分类号： H03M7/42 ,  H04N5/147 ,  H04N19/13 ,  H04N19/142 ,  H04N19/179 ,  H04N19/503 ,  H04N19/61 ,  H04N19/87

    摘要： A variable length coding method and apparatus is provided. The variable length coding method includes the steps of analyzing the occurrence statistics of symbols with respect to previous frames, generating a mapping table for variably mapping input symbols to bit patterns based on the analyzed occurrence statistics of the input symbols, resetting the mapping relationship between symbols and bit patterns based on the generated mapping table, and variable length coding a current frame based on the reset mapping relationship. The variable length coding method efficiently reduces the number of bits generated by dynamically varying the mapping between input symbols and bit patterns depending on the occurrence statistics of the input symbols. Moreover, the variable length coding method performs variable length coding taking into account the occurrence statistics of symbols with respect to an image frame, thereby steadily performing the variable length coding regardless of changes in the statistical characteristics or coding parameters of an image.

    摘要翻译： 提供了一种可变长度编码方法和装置。 可变长度编码方法包括以下步骤：基于所分析的输入符号的出现统计，生成用于将输入符号可变地映射到位模式的映射表，重新设置符号之间的映射关系 和基于生成的映射表的位模式，以及基于重置映射关系对当前帧进行可变长度编码。 可变长度编码方法通过根据输入符号的出现统计动态地改变输入符号和位模式之间的映射来有效地减少产生的位数。 此外，可变长度编码方法考虑到相对于图像帧的符号的出现统计，执行可变长度编码，从而不管图像的统计特性或编码参数的变化如何，稳定地执行可变长度编码。

    Signal adaptive filtering method and signal adaptive filter for reducing blocking effect and ringing noise
    6.
    发明授权
    Signal adaptive filtering method and signal adaptive filter for reducing blocking effect and ringing noise 失效
    信号自适应滤波方法和信号自适应滤波器，用于减少阻塞效应和振铃噪声

    公开(公告)号：US06259823B1

    公开(公告)日：2001-07-10

    申请号：US08956036

    申请日：1997-10-22

    申请人： Yung-lyul Lee ,  Hyun-wook Park

    发明人： Yung-lyul Lee ,  Hyun-wook Park

    IPC分类号： H04N521

    CPC分类号： G06T5/20 ,  G06T9/00 ,  H04N19/117 ,  H04N19/14 ,  H04N19/527

    摘要： A signal adaptive filtering method is disclosed for reducing a blocking effect and ringing noise of an image data. A gradient of the image data is calculated for each pixel of the image data. Then, the gradient data of each pixel is compared with a global threshold value (Tg) which is determined based on a predetermined quantization step size (Q), and global edge map information of the pixel is generated. Meanwhile, the gradient data of each pixel is compared with a local threshold value (Tn) determined for each block having a predetermined size, and local edge map information of the pixel is generated. An OR operation is performed with respect to the global edge map information and the local edge map information to generate binary edge map information. Then, a predetermined sized filter window is applied to determine whether edges are present in the binary edge map information within the filter window. Afterwards, the image data pixel values of the corresponding filter window are filtered, pixel by pixel, by using predetermined first weighted values to generate a first new pixel value if it is determined that edges are not present. The image data pixel values within the corresponding filter window are filtered, pixel by pixel, by using predetermined second weighted values to generate a second new pixel value if it is determined that edges are present within the window. No filtering is performed if the pixel located at the center of the filter window represents an edge.

    摘要翻译： 公开了一种用于降低图像数据的阻塞效果和振铃噪声的信号自适应滤波方法。针对图像数据的每个像素计算图像数据的梯度。 然后，将每个像素的梯度数据与基于预定量化步长（Q）确定的全局阈值（Tg）进行比较，并生成像素的全局边缘图信息。 同时，将每个像素的梯度数据与对于具有预定大小的每个块确定的局部阈值（Tn）进行比较，并且生成像素的局部边缘图信息。 对全局边缘地图信息和局部边缘地图信息进行OR运算，生成二进制边缘地图信息。 然后，应用预定大小的滤波器窗口来确定边缘是否存在于滤波器窗口内的二进制边缘图信息中。 然后，如果确定边缘不存在，则通过使用预定的第一加权值逐个像素地对相应的滤波器窗口的图像数据像素值进行滤波，以产生第一新像素值。 如果确定边缘存在于窗口内，则通过使用预定的第二加权值逐个像素地对相应的滤波器窗口内的图像数据像素值进行滤波，以产生第二新像素值。 如果位于过滤器窗口中心的像素表示边缘，则不进行滤波。

    Encoding and decoding multi-view video while accommodating absent or unreliable camera parameters
    9.
    发明授权
    Encoding and decoding multi-view video while accommodating absent or unreliable camera parameters 有权
    编码和解码多视图视频，同时适应不存在或不可靠的摄像机参数

    公开(公告)号：US08031767B2

    公开(公告)日：2011-10-04

    申请号：US11280182

    申请日：2005-11-17

    申请人： Yung-lyul Lee

    发明人： Yung-lyul Lee

    IPC分类号： G06K9/00 ,  H04N7/12

    CPC分类号： H04N13/178 ,  H04N13/243 ,  H04N13/25 ,  H04N13/349 ,  H04N19/136 ,  H04N19/597

    摘要： A method of encoding multi-view video using camera parameters and a method of decoding multi-view video using the camera parameters are provided. The method of encoding multi-view video using the camera parameters includes detecting the camera parameters from each of a plurality of video data input from a multi-view camera in predetermined video units, and adaptively encoding each of the plurality of the video data according to whether each video data has the camera parameters. Accordingly, it is possible to increase the efficiency of compressing video without degrading video quality.

    摘要翻译： 提供了使用相机参数对多视图视频进行编码的方法以及使用相机参数解码多视点视频的方法。 使用摄像机参数对多视点视频进行编码的方法包括：以预定视频单元从多视点摄像机输入的多个视频数据中的每一个检测摄像机参数，以及根据多视点数据中的每一个根据 每个视频数据是否具有相机参数。 因此，可以提高压缩视频的效率而不降低视频质量。

    Signal adaptive filtering method, signal adaptive filter and computer readable medium for storing program therefor
    10.
    发明授权
    Signal adaptive filtering method, signal adaptive filter and computer readable medium for storing program therefor 有权
    信号自适应滤波方法，信号自适应滤波器和用于存储程序的计算机可读介质

    公开(公告)号：US07801216B2

    公开(公告)日：2010-09-21

    申请号：US10354986

    申请日：2003-01-31

    申请人： Yung-lyul Lee ,  Hyun-wook Park

    发明人： Yung-lyul Lee ,  Hyun-wook Park

    IPC分类号： H04N7/12 ,  G06K9/40

    CPC分类号： H04N19/00 ,  G06T5/00 ,  G06T5/002 ,  G06T5/20 ,  G06T2207/20008 ,  H04N19/117 ,  H04N19/124 ,  H04N19/127 ,  H04N19/136 ,  H04N19/14 ,  H04N19/157 ,  H04N19/159 ,  H04N19/172 ,  H04N19/182 ,  H04N19/189 ,  H04N19/44 ,  H04N19/48 ,  H04N19/527 ,  H04N19/60 ,  H04N19/61 ,  H04N19/80 ,  H04N19/86 ,  H04N19/90

    摘要： A signal adaptive filtering method for reducing blocking effect and ringing noise, a signal adaptive filter, and a computer readable medium. The signal adaptive filtering method capable of reducing blocking effect and ringing noise of image data when a frame is composed of blocks of a predetermined size includes the steps of: (a) generating blocking information for reducing the blocking effect and ringing information for reducing the ringing noise, from coefficients of predetermined pixels of the upper and left boundary regions of the data block when a frame obtained by deconstructing a bitstream image data for inverse quantization is an intraframe; and (b) adaptively filtering the image data passed through inverse quantization and inverse discrete cosine transform according to the generated blocking information and ringing information. Therefore, the blocking effect and ringing noise can be eliminated from the image restored from the block-based image, thereby enhancing the image restored from compression.

    摘要翻译： 一种用于减少阻塞效应和振铃噪声的信号自适应滤波方法，信号自适应滤波器和计算机可读介质。 当帧由预定尺寸的块组成时，能够减少图像数据的阻塞效应和振铃噪声的信号自适应滤波方法包括以下步骤：（a）产生阻塞信息以减少阻塞效应和振铃信息以减少振铃 当通过解构用于逆量化的比特流图像数据而获得的帧是帧内时，来自数据块的上边界区域和左边界区域的预定像素的系数的噪声; 和（b）根据生成的阻塞信息和振铃信息自适应地过滤通过逆量化和逆离散余弦变换的图像数据。 因此，可以从基于块的图像恢复的图像中消除阻挡效果和振铃噪声，从而增强从压缩恢复的图像。