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61. 发明申请

US20090009370A1 TRANSCODER 失效
公开(公告)号：US20090009370A1
公开(公告)日：2009-01-08
申请号：US12144098
申请日：2008-06-23
申请人： Hiromu Hasegawa , Miyuki Yanagida
发明人： Hiromu Hasegawa , Miyuki Yanagida
IPC分类号： H03M7/00
CPC分类号： H04N19/40 , H04N19/124 , H04N19/149 , H04N19/61
摘要： A transcoder calculates a reference conversion factor on the basis of a ratio between a total target bit rate of a whole second stream and an total input bit rate of a whole first stream and calculates a coefficient of variation from the total target bit rate of the whole second stream and an average output bit rate of a converted second stream in the N period. Next, a quantization step conversion factor in the next (N+1) period is calculated by adding the coefficient of variation to the reference conversion factor. Then, a quantization step value of a second stream in the (N+1) period is calculated by multiplying a quantization step value of a first stream in the (N+1) period by the quantization step conversion factor.
摘要翻译：代码转换器基于整个第二流的总目标比特率与整个第一流的总输入比特率之间的比率来计算参考转换因子，并且从整体的总目标比特率计算变异系数第二流和在N个周期中转换的第二流的平均输出比特率。接下来，通过将变化系数与参考转换因子相加来计算下一个（N + 1）周期中的量化步长转换因子。然后，通过将第（N + 1）个周期中的第一流的量化步长值乘以量化步长转换因子来计算第（N + 1）周期中的第二流的量化步长值。

62. 发明申请

US20060114526A1 Pixel interpolation method and image distinction method 有权
标题翻译：像素插值法和图像辨别方法
公开(公告)号：US20060114526A1
公开(公告)日：2006-06-01
申请号：US11288118
申请日：2005-11-29
申请人： Hiromu Hasegawa
发明人： Hiromu Hasegawa
IPC分类号： G03F3/08
CPC分类号： G06T3/4015 , H04N2101/00
摘要： An image processing circuit inputs pixels arranged in RGB Bayer pattern. A chroma value calculation circuit calculates a chroma coefficient for evaluating chroma of a peripheral region of a target pixel. A correlation value calculation circuit calculates a correlation value for gray image and a correlation value for color image. When the chroma coefficient is higher than a first threshold value, a correlation judging method for color image and a pixel interpolation method for color image are selected. When the chroma coefficient is not higher than the first threshold value and higher than a second threshold value, a correlation judging method for gray image and the pixel interpolation method for color image are selected. When the chroma coefficient is not higher than the second threshold value, the correlation judging method for gray image and a pixel interpolation method for gray image are selected. Interpolation is executed in a pixel interpolation circuit.
摘要翻译：图像处理电路输入以RGB拜耳图案排列的像素。色度值计算电路计算用于评估目标像素的周边区域的色度的色度系数。相关值计算电路计算灰度图像的相关值和彩色图像的相关值。当色度系数高于第一阈值时，选择彩色图像的相关判断方法和彩色图像的像素插值方法。当色度系数不高于第一阈值且高于第二阈值时，选择用于灰度图像的相关判断方法和彩色图像的像素插值方法。当色度系数不高于第二阈值时，选择灰度图像的相关判断方法和灰度图像的像素插值方法。插值在像素插值电路中执行。

63. 发明授权

US06480670B1 Video signal encoding method and system 失效
标题翻译：视频信号编码方法和系统
公开(公告)号：US06480670B1
公开(公告)日：2002-11-12
申请号：US09449494
申请日：1999-11-29
申请人： Yoshiko Hatano , Tadashi Kasezawa , Koji Okazaki , Takashi Shinohara , Hiromu Hasegawa , Hidetoshi Mishima
发明人： Yoshiko Hatano , Tadashi Kasezawa , Koji Okazaki , Takashi Shinohara , Hiromu Hasegawa , Hidetoshi Mishima
IPC分类号： H04N736
CPC分类号： H04N19/105 , H04N5/145 , H04N19/107 , H04N19/112 , H04N19/137 , H04N19/142 , H04N19/179 , H04N19/51 , H04N19/57 , H04N19/577 , H04N19/87
摘要： In an image signal encoding method for encoding an image signal using motion compensation, a motion vector is found by means of a block matching method, a first distortion SEmc of motion compensated prediction associated with the motion vector, and a second distortion SEnomc of prediction without motion compensation are detected, the motion vector is used for for inter-picture prediction encoding when SEnomc>SEmc+K, with K being a constant greater than 0, and a vector having a value zero is used, in place of the motion vector, for inter-picture prediction encoding when SEnomc≦SEmc+K. In another aspect, a speed of motion in a sequence of pictures is detected, and for a part of the sequence of pictures detected to contain a quick motion, the prediction encoding is performed using one-way prediction encoding, and for a part of the sequence of pictures without a quick motion, prediction encoding is performed using bi-directional prediction encoding. In another aspect, the image signal is subsampled for each field, and a motion vector is determined using the field-subsampled image signal.
摘要翻译：在用于使用运动补偿对图像信号进行编码的图像信号编码方法中，通过块匹配方法，与运动矢量相关联的运动补偿预测的第一失真SEmc以及无运动补偿预测的第二失真SEnomc，找到运动矢量检测到运动补偿时，运动矢量用于SEnomc> SEmc + K时的画面间预测编码，其中K为大于0的常数，使用零值的矢量代替运动矢量，用于当SEnomc <= SEmc + K时的画面间预测编码。在另一方面，检测图像序列中的运动速度，并且对于被检测为包含快速运动的图像序列的一部分，使用单向预测编码执行预测编码，并且对于一部分没有快速运动的图像序列，使用双向预测编码执行预测编码。在另一方面，对于每个场对图像信号进行二次采样，并且使用场二次采样的图像信号来确定运动矢量。

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