公开(公告)号：US20080304564A1

公开(公告)日：2008-12-11

申请号：US12013655

申请日：2008-01-14

申请人： Nak-hoon KIM ,  Byung-cheol Song ,  Yun-gu Lee

发明人： Nak-hoon KIM ,  Byung-cheol Song ,  Yun-gu Lee

IPC分类号： H04N7/26

CPC分类号： H04N19/174 ,  H04N19/115 ,  H04N19/126 ,  H04N19/149 ,  H04N19/152 ,  H04N19/177 ,  H04N19/197

摘要： A bitrate control method and apparatus for video sequence coding by using only intra pictures are provided. The rate control method includes: separating a video sequence formed only with intra pictures, into picture group units, slice units, and macroblock units; and performing bitrate control so that a predetermined amount of bits can be generated when encoding is performed. According to the method and apparatus, overflow and underflow of a buffer can be prevented.

摘要翻译： 提供了仅使用帧内图像的用于视频序列编码的比特率控制方法和装置。 速率控制方法包括：将仅由帧内图像形成的视频序列分离成图像组单元，片单元和宏块单元; 并执行比特率控制，使得当执行编码时可以产生预定量的比特。 根据该方法和装置，可以防止缓冲器的上溢和下溢。

公开(公告)号：US20100054616A1

公开(公告)日：2010-03-04

申请号：US12201344

申请日：2008-08-29

申请人： Nak-hoon KIM

发明人： Nak-hoon KIM

IPC分类号： G06K9/36 ,  H04N7/12 ,  H04N7/32

CPC分类号： H04N19/463 ,  H04N19/176 ,  H04N19/196

摘要： Provided are methods and apparatuses for encoding and decoding an image. The method of encoding the image includes calculating the number of times that encoding information of each of a plurality of sub-blocks included in a current block is exactly predicted, determining whether or not to predictably encode the encoding information of each sub-block, based on the calculated number of times, and predictably encoding the encoding information of each sub-block according to the determination. Using the method can prevent the case in which many bits are required to encode the encoding information due to inexact prediction about the encoding information, thereby decreasing the compression ratio of the image encoding process, and can compress the image with a higher efficiency.

摘要翻译： 提供了用于对图像进行编码和解码的方法和装置。 编码图像的方法包括：计算当前块中包括的多个子块中的每一个的编码信息被精确地预测的次数，基于每个子块的编码信息来确定是否可预测地编码 根据该计算出的次数，根据该判断可预测地编码各子块的编码信息。 使用该方法可以防止由于对编码信息的不精确预测而需要许多位对编码信息进行编码的情况，从而降低图像编码处理的压缩比，并且可以以更高的效率来压缩图像。

公开(公告)号：US20080304760A1

公开(公告)日：2008-12-11

申请号：US12107855

申请日：2008-04-23

申请人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

发明人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

IPC分类号： G06K9/46 ,  G06K9/36

CPC分类号： H04N19/57 ,  H04N19/51 ,  H04N19/597

摘要： A method and apparatus for compensating for illumination of a reference block and a method and apparatus for encoding an image, using the illumination compensation method and apparatus, are provided. The method of compensating for illumination of a reference block includes: predicting the mean values of pixels of a current block and a reference block, based on restored values of pixels neighboring the current block, and restored values of pixels neighboring the reference block; and based on the predicted mean value of the pixels of the current block, the predicted mean value of the pixels of the reference block, and the values of the pixels of the current block and the reference block, determining an illumination compensation parameter.

摘要翻译： 提供了一种用于补偿参考块的照明的方法和装置，以及使用照明补偿方法和装置对图像进行编码的方法和装置。 补偿参考块的照明的方法包括：基于与当前块相邻的像素的恢复值以及与参考块相邻的像素的恢复值，预测当前块和参考块的像素的平均值; 并且基于当前块的像素的预测平均值，参考块的像素的预测平均值以及当前块和参考块的像素的值，确定照明补偿参数。

公开(公告)号：US20080304759A1

公开(公告)日：2008-12-11

申请号：US12013040

申请日：2008-01-11

申请人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

发明人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

IPC分类号： G06K9/46

CPC分类号： H04N19/105 ,  H04N19/176 ,  H04N19/186 ,  H04N19/61

摘要： Provided are an image encoding method and apparatus and an image decoding method and apparatus that are capable of canceling a correlation remaining in a residual image by predicting the residual image by using residual pixel values of restored neighboring pixels of a current block and then encoding only the difference between the residual image and a predicted image of the residual image, where the residual image is obtained using an inter color compensation algorithm that predicts one of a plurality of color component images constituting an image by using one of the remnants of the color component images.

摘要翻译： 提供了一种图像编码方法和装置以及图像解码方法和装置，其能够通过使用当前块的恢复的相邻像素的残留像素值来预测剩余图像来抵消剩余图像中的相关性，然后仅对 残差图像与残差图像的预测图像之间的差异，其中使用色彩间补偿算法获得残差图像，该色彩间补偿算法通过使用颜色分量图像的残留中的一个来预测构成图像的多个颜色分量图像中的一个 。

公开(公告)号：US20090046778A1

公开(公告)日：2009-02-19

申请号：US12055660

申请日：2008-03-26

申请人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

发明人： Yun-gu LEE ,  Byung-cheol SONG ,  Nak-hoon KIM

IPC分类号： H04N7/26

CPC分类号： H04N19/152 ,  H04N19/115 ,  H04N19/124 ,  H04N19/136 ,  H04N19/176 ,  H04N19/60

摘要： Provided are a bit rate control method and apparatus for intra-only coding, the method including calculating a similarity between at least one block group from among block groups including a plurality of macroblocks in a current frame to be encoded and at least one block group in a previous frame, which corresponds to the at least one block group in the current frame, determining a target bit amount of a current block group including a current macroblock using a video characteristic of the previous frame if the calculated similarity is greater than a threshold value, determining a target bit amount of the current macroblock based on the determined target bit amount of the current block group, and calculating a quantization parameter of the current macroblock based on the determined target bit amount of the current macroblock and the amount of bits generated for up to a previous macroblock.

摘要翻译： 提供了一种用于内部编码的比特率控制方法和装置，该方法包括：计算来自包括当前待编码帧中的多个宏块的块组中的至少一个块组与至少一个块组之间的相似度， 前一帧，其对应于当前帧中的至少一个块组，如果所计算的相似度大于阈值，则使用前一帧的视频特性来确定包括当前宏块的当前块组的目标比特量 基于所确定的当前块组的目标比特量来确定当前宏块的目标比特量，并且基于所确定的当前宏块的目标比特量和当前宏块的所生成的比特量来计算当前宏块的量化参数 直到之前的宏块。