公开(公告)号：US07869518B2

公开(公告)日：2011-01-11

申请号：US11243095

申请日：2005-10-04

申请人： Byung Gyu Kim ,  Pyeong Soo Mah ,  Seon Tae Kim ,  Suk Kyu Song

发明人： Byung Gyu Kim ,  Pyeong Soo Mah ,  Seon Tae Kim ,  Suk Kyu Song

IPC分类号： H04N7/12

CPC分类号： H04N21/234309 ,  H04N19/40 ,  H04N19/513 ,  H04N19/533 ,  H04N19/56 ,  H04N19/57 ,  H04N19/61 ,  H04N19/70 ,  H04N21/2355 ,  H04N21/2662 ,  H04N21/812

摘要： A fast motion estimation apparatus and method in which motion estimation is carried out on a current block of a current frame of video image data with reference to a corresponding matching block of a previous frame are provided. The fast motion estimation apparatus includes: a determination unit which determines whether an SAD between pixel values of a current block of a current frame and a corresponding matching block of a previous frame is greater than a predefined threshold; an initial search unit which performs an initial search when the SAD is greater than the predetermined threshold to find which search point of a current search pattern is the minimal SAD point and to determine whether the minimal SAD point matches the center of the current search pattern; and a repetitive search unit which performs an iteration search when the minimal SAD point differs from the center of the current search pattern to reset the minimal SAD point to be a center of the current search pattern and to set a number of search points and the size of a search pattern based on from current search pattern to a center of the search window of the previous frame.

摘要翻译： 提供了参照前一帧的对应的匹配块对视频图像数据的当前帧的当前块执行运动估计的快速运动估计装置和方法。 快速运动估计装置包括：确定单元，确定当前帧的当前块的像素值与前一帧的对应匹配块之间的SAD是否大于预定阈值; 初始搜索单元，当SAD大于预定阈值时执行初始搜索，以找出当前搜索模式的哪个搜索点是最小SAD点，并确定最小SAD点是否与当前搜索模式的中心匹配; 以及重复搜索单元，当最小SAD点与当前搜索模式的中心不同时执行迭代搜索，以将最小SAD点重置为当前搜索模式的中心，并设置搜索点的数量和大小 基于从当前搜索模式到前一帧的搜索窗口的中心的搜索模式。

公开(公告)号：US07961357B2

公开(公告)日：2011-06-14

申请号：US11272301

申请日：2005-11-09

申请人： Byung-Gyu Kim ,  Seon-Tae Kim ,  Suk-Kyu Song ,  Pyeong-Soo Mah

发明人： Byung-Gyu Kim ,  Seon-Tae Kim ,  Suk-Kyu Song ,  Pyeong-Soo Mah

IPC分类号： G06T5/00 ,  H04N1/407 ,  H04N1/409

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176

摘要： A device for eliminating a block artifact phenomenon of a decoded image frame, and an eliminating method thereof. A method for eliminating a block artifact phenomenon according to the present invention includes: extracting pixel information including a magnitude of edge response, an edge direction, and an edge position, by applying an edge detector to an arbitrary pixel in an image frame; distinguishing the pixel into a non-edge pixel, an object edge pixel, or a block edge pixel by using the extracted pixel information; and performing filtering according to the distinguishing result. In this manner, an object edge information is selectively protected, so that an improved image quality may be provided.

摘要翻译： 一种用于消除解码图像帧的块伪影现象的装置及其消除方法。 根据本发明的用于消除块伪影现象的方法包括：通过将边缘检测器应用于图像帧中的任意像素来提取包括边缘响应的大小，边缘方向和边缘位置的像素信息; 通过使用提取的像素信息将像素区分为非边缘像素，对象边缘像素或块边缘像素; 并根据识别结果进行滤波。 以这种方式，选择性地保护对象边缘信息，从而可以提供改善的图像质量。

公开(公告)号：US07903736B2

公开(公告)日：2011-03-08

申请号：US11375629

申请日：2006-03-14

申请人： Byung Gyu Kim ,  Suk Kyu Song ,  Seon Tae Kim ,  Pyeong Soo Mah

发明人： Byung Gyu Kim ,  Suk Kyu Song ,  Seon Tae Kim ,  Pyeong Soo Mah

IPC分类号： H04N7/12

CPC分类号： H04N19/107 ,  H04N19/109 ,  H04N19/11 ,  H04N19/147 ,  H04N19/176 ,  H04N19/19 ,  H04N19/61

摘要： Provided is a fast mode-searching apparatus and method for motion-prediction. The fast mode-searching apparatus includes a probability information obtaining unit, a first inter mode searching unit, a second inter mode searching unit, and a selective intra mode searching unit. The probability information obtaining unit detects whether at least one of a macroblock of a previous frame, a macroblock of a current frame, and adjacent macroblocks corresponds to at least one of P16×16, P16×8, and P8×16. The first inter mode searching unit performs an inter mode search on a block that is not detected by the probability information obtaining unit. The second inter mode searching unit determines whether the macroblock of the current frame corresponds to P16×16 as a result of performing the inter mode search on a block detected by the probability information obtaining unit. The selective intra mode searching unit performs an intra mode search if the macroblock of the current frame corresponds to P16×16.

摘要翻译： 提供了一种用于运动预测的快速模式搜索装置和方法。 快速模式搜索装置包括概率信息获取单元，第一帧间模式搜索单元，第二帧间模式搜索单元和选择性帧内模式搜索单元。 概率信息获取单元检测前一帧的宏块，当前帧的宏块和相邻宏块中的至少一个是否对应于P16×16，P16×8和P8×16中的至少一个。 第一帧间模式搜索单元对未由概率信息获取单元检测到的块执行帧间模式搜索。 作为对由概率信息获取单元检测到的块执行帧间模式搜索的结果，第二帧间模式搜索单元确定当前帧的宏块是否对应于P16×16。 如果当前帧的宏块对应于P16×16，则选择性帧内模式搜索单元执行帧内模式搜索。

公开(公告)号：US20060181740A1

公开(公告)日：2006-08-17

申请号：US11272301

申请日：2005-11-09

申请人： Byung-Gyu Kim ,  Seon-Tae Kim ,  Suk-Kyu Song ,  Pyeong-Soo Mah

发明人： Byung-Gyu Kim ,  Seon-Tae Kim ,  Suk-Kyu Song ,  Pyeong-Soo Mah

IPC分类号： H04N1/409

CPC分类号： H04N19/86 ,  H04N19/117 ,  H04N19/14 ,  H04N19/176

摘要： A device for eliminating a block artifact phenomenon of a decoded image frame, and an eliminating method thereof. A method for eliminating a block artifact phenomenon according to the present invention includes: extracting pixel information including a magnitude of edge response, an edge direction, and an edge position, by applying an edge detector to an arbitrary pixel in an image frame; distinguishing the pixel into a non-edge pixel, an object edge pixel, or a block edge pixel by using the extracted pixel information; and performing filtering according to the distinguishing result. In this manner, an object edge information is selectively protected, so that an improved image quality may be provided.

摘要翻译： 一种用于消除解码图像帧的块伪影现象的装置及其消除方法。 根据本发明的用于消除块伪影现象的方法包括：通过将边缘检测器应用于图像帧中的任意像素来提取包括边缘响应的大小，边缘方向和边缘位置的像素信息; 通过使用提取的像素信息将像素区分为非边缘像素，对象边缘像素或块边缘像素; 并根据识别结果进行滤波。 以这种方式，选择性地保护对象边缘信息，从而可以提供改善的图像质量。