公开(公告)号：US20080069217A1

公开(公告)日：2008-03-20

申请号：US11902144

申请日：2007-09-19

申请人： Koji Minami ,  Toshihiro Gai ,  Hironobu Yasui ,  Shuji Sotoda ,  Chihiro Sakuwa ,  Takashi Fujiwara

发明人： Koji Minami ,  Toshihiro Gai ,  Hironobu Yasui ,  Shuji Sotoda ,  Chihiro Sakuwa ,  Takashi Fujiwara

IPC分类号： H04N7/26

CPC分类号： H04N7/0132 ,  G09G2340/0435 ,  H04N7/0137 ,  H04N7/0145

摘要： A frame interpolation apparatus generates a pixel value at an interpolation position by examining pairs of pixel blocks, one from a preceding reference frame and one from a following reference frame, located in positions that are point-symmetric or nearly point-symmetric with respect to the interpolation position. The pair of pixel blocks showing the greatest mutual similarity is selected, the central pixels in the selected pair of pixel blocks are taken as reference pixels, and the interpolated pixel value is generated from the reference pixel values. By routinely examining a large number of pairs of pixel blocks for each interpolation position, the frame interpolation apparatus can detect image motion accurately and generate accurate interpolated values.

摘要翻译： 帧内插装置通过检查位于相对于点对称或接近点对称的位置中的对象的像素块，来自前一个参考帧的一对像素块和来自后续参考帧的像素块，生成插值位置处的像素值。 插补位置。 选择显示最大相互相似度的一对像素块，将所选择的一对像素块中的中心像素作为参考像素，并根据参考像素值生成内插像素值。 通过定期检查每个插值位置的大量像素块对，帧内插装置可以精确地检测图像运动并产生准确的内插值。

公开(公告)号：US08218632B2

公开(公告)日：2012-07-10

申请号：US11902144

申请日：2007-09-19

申请人： Koji Minami ,  Toshihiro Gai ,  Hironobu Yasui ,  Shuji Sotoda ,  Chihiro Sakuwa ,  Takashi Fujiwara

发明人： Koji Minami ,  Toshihiro Gai ,  Hironobu Yasui ,  Shuji Sotoda ,  Chihiro Sakuwa ,  Takashi Fujiwara

IPC分类号： H04N11/04

CPC分类号： H04N7/0132 ,  G09G2340/0435 ,  H04N7/0137 ,  H04N7/0145

摘要： A frame interpolation apparatus generates a pixel value at an interpolation position by examining pairs of pixel blocks, one from a preceding reference frame and one from a following reference frame, located in positions that are point-symmetric or nearly point-symmetric with respect to the interpolation position. The pair of pixel blocks showing the greatest mutual similarity is selected, the central pixels in the selected pair of pixel blocks are taken as reference pixels, and the interpolated pixel value is generated from the reference pixel values. By routinely examining a large number of pairs of pixel blocks for each interpolation position, the frame interpolation apparatus can detect image motion accurately and generate accurate interpolated values.

摘要翻译： 帧内插装置通过检查位于相对于点对称或几乎点对称的位置中的来自先前参考帧的一个像素块和来自后续参考帧的像素块对，来生成插值位置处的像素值 插补位置。 选择显示最大相互相似度的一对像素块，将所选择的一对像素块中的中心像素作为参考像素，并根据参考像素值生成内插像素值。 通过定期检查每个插值位置的大量像素块对，帧内插装置可以精确地检测图像运动并产生准确的内插值。

公开(公告)号：US20080062101A1

公开(公告)日：2008-03-13

申请号：US11587695

申请日：2005-02-16

申请人： Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai ,  Masako Asamura

发明人： Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai ,  Masako Asamura

IPC分类号： G09G3/36

CPC分类号： H04N5/20 ,  G09G3/20 ,  G09G5/02 ,  G09G2320/0247 ,  G09G2320/0613 ,  G09G2320/066 ,  G09G2320/103 ,  G09G2340/06 ,  G09G2360/16 ,  H04N5/147

摘要： A gray-scale conversion means (10) converts the gray scale of an input video signal (100) as necessary, and outputs the video signal with the converted gray scale. A statistical processing means (13) detects a statistical property of each field or frame of the input video signal; a scene change detection means (16) detects scene changes in the input video signal. A conversion characteristic determination means (22) determines the gray-scale conversion characteristic according to outputs of the statistical processing means (13) and the scene change detection means (16). The gray-scale correction increases contrast regardless of image content, and enables faster response to changes in image content.

摘要翻译： 灰度转换装置（10）根据需要转换输入视频信号（100）的灰度，并输出具有转换灰度级的视频信号。 统计处理装置（13）检测输入视频信号的每个场或帧的统计特性; 场景变化检测装置（16）检测输入视频信号中的场景变化。 转换特性确定装置（22）根据统计处理装置（13）和场景变化检测装置（16）的输出确定灰度转换特性。 无论图像内容如何，​​灰度校正增加对比度，并且能够更快地响应图像内容的变化。

公开(公告)号：US20080151103A1

公开(公告)日：2008-06-26

申请号：US11884211

申请日：2005-11-21

申请人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

发明人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

IPC分类号： H04N7/01

CPC分类号： H04N7/0115 ,  H04N7/012

摘要： A video signal processing apparatus, which can prevent degradation of picture quality in converting an interlaced scan video signal to a progressive scan video signal, includes an interframe correlation detection means (11); an interfield correlation detection means (12); a field resolution determination means (13) which generates a signal (filhv) indicative of a degree of high frequency components existing in a field; a pull-down sequence detection means (14) which generates a telecine detection signal (tci) indicating whether or not an input video signal is any of 2-3 pull-down telecine video signal and 2-2 pull-down telecine video signal and also generates a mixing ratio signal (tcmix) indicative of a mixing ratio used at the time of interpolation processing; an interpolation signal generation means (110) which mixes a plurality of kinds of interpolation signals (Im, It) in accordance with the telecine detection signal (tci) and the mixing ratio signal (tcmix); and a rate doubling conversion means (9) which generates the progressive scan video signal (Prog) from a delayed video signal (R) and an interpolation signal (I).

摘要翻译： 可以防止将隔行扫描视频信号转换成逐行扫描视频信号时的图像质量劣化的视频信号处理装置包括帧间相关检测装置（11）。 场间相关检测装置（12）; 场分解确定装置（13），其产生指示存在于场中的高频分量的信号（filhv）; 产生指示输入视频信号是否为2-3下拉电视电影视频信号和2-2下拉电视电视视频信号中的任一个的电视电影检测信号（tci）的下拉序列检测装置（14），以及 还产生表示在插值处理时使用的混合比的混合比信号（tcmix）; 根据电视电影检测信号（tci）和混合比信号（tcmix）混合多种内插信号（Im，It）的内插信号生成装置（110）; 以及从延迟视频信号（R）和内插信号（I）产生逐行扫描视频信号（Prog）的速率倍增变换装置（9）。

公开(公告)号：US08174614B2

公开(公告)日：2012-05-08

申请号：US11884211

申请日：2005-11-21

申请人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

发明人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

IPC分类号： H04N7/01 ,  H04N9/64

CPC分类号： H04N7/0115 ,  H04N7/012

摘要： A video signal processing apparatus, which can prevent degradation of picture quality in converting an interlaced scan video signal to a progressive scan video signal, includes an interframe correlation detection means (11); an interfield correlation detection means (12); a field resolution determination means (13) which generates a signal (filhv) indicative of a degree of high frequency components existing in a field; a pull-down sequence detection means (14) which generates a telecine detection signal (tci) indicating whether or not an input video signal is any of 2-3 pull-down telecine video signal and 2-2 pull-down telecine video signal and also generates a mixing ratio signal (tcmix) indicative of a mixing ratio used at the time of interpolation processing; an interpolation signal generation means (110) which mixes a plurality of kinds of interpolation signals (Im, It) in accordance with the telecine detection signal (tci) and the mixing ratio signal (tcmix); and a rate doubling conversion means (9) which generates the progressive scan video signal (Prog) from a delayed video signal (R) and an interpolation signal (I).

摘要翻译： 可以防止将隔行扫描视频信号转换成逐行扫描视频信号时的图像质量劣化的视频信号处理装置包括帧间相关检测装置（11）。 场间相关检测装置（12）; 场分解确定装置（13），其产生指示存在于场中的高频分量的信号（filhv）; 产生指示输入视频信号是否为2-3下拉电视电影视频信号和2-2下拉电视电视视频信号中的任一个的电视电影检测信号（tci）的下拉序列检测装置（14），以及 还产生表示在插值处理时使用的混合比的混合比信号（tcmix）; 根据电视电影检测信号（tci）和混合比信号（tcmix）混合多种内插信号（Im，It）的内插信号生成装置（110）; 以及从延迟视频信号（R）和内插信号（I）产生逐行扫描视频信号（Prog）的速率倍增变换装置（9）。

公开(公告)号：US20070229709A1

公开(公告)日：2007-10-04

申请号：US11723121

申请日：2007-03-16

申请人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

发明人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

IPC分类号： H04N5/00

CPC分类号： H04N5/21 ,  H04N5/144

摘要： A video noise reducer processes a frame difference signal equal to the difference between the video signal of the current frame and the video signal of the preceding frame or the difference between the video signal of the current frame and the noise-reduced video signal of the preceding frame to obtain a motion detection signal and a noise detection signal. The difference between the motion detection signal and the noise detection signal is then processed to obtain a recursion coefficient. The frame difference signal is multiplied by the recursion coefficient and the resulting product is additively combined with the video signal of the current frame to reduce noise without generating significant motion artifacts.

摘要翻译： 视频噪声降低器处理等于当前帧的视频信号和前一帧的视频信号之间的差的帧差信号或当前帧的视频信号与前一帧的视频信号之间的差异 帧以获得运动检测信号和噪声检测信号。 然后处理运动检测信号和噪声检测信号之间的差异以获得递归系数。 帧差信号乘以递归系数，并将所得到的乘积与当前帧的视频信号相加组合以减少噪声而不产生显着的运动伪像。

公开(公告)号：US08218083B2

公开(公告)日：2012-07-10

申请号：US11723121

申请日：2007-03-16

申请人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

发明人： Masako Asamura ,  Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai

IPC分类号： H04N5/21 ,  H04N5/14

CPC分类号： H04N5/21 ,  H04N5/144

摘要： A video noise reducer processes a frame difference signal equal to the difference between the video signal of the current frame and the video signal of the preceding frame or the difference between the video signal of the current frame and the noise-reduced video signal of the preceding frame to obtain a motion detection signal and a noise detection signal. The difference between the motion detection signal and the noise detection signal is then processed to obtain a recursion coefficient. The frame difference signal is multiplied by the recursion coefficient and the resulting product is additively combined with the video signal of the current frame to reduce noise without generating significant motion artifacts.

摘要翻译： 视频噪声降低器处理等于当前帧的视频信号和前一帧的视频信号之间的差的帧差信号或当前帧的视频信号与前一帧的视频信号之间的差异 帧以获得运动检测信号和噪声检测信号。 然后处理运动检测信号和噪声检测信号之间的差异以获得递归系数。 帧差信号乘以递归系数，并将所得到的乘积与当前帧的视频信号相加组合以减少噪声而不产生显着的运动伪像。

公开(公告)号：US07667721B2

公开(公告)日：2010-02-23

申请号：US11587695

申请日：2005-02-16

申请人： Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai ,  Masako Asamura

发明人： Koji Minami ,  Chihiro Sakuwa ,  Toshihiro Gai ,  Masako Asamura

IPC分类号： G09G5/10

CPC分类号： H04N5/20 ,  G09G3/20 ,  G09G5/02 ,  G09G2320/0247 ,  G09G2320/0613 ,  G09G2320/066 ,  G09G2320/103 ,  G09G2340/06 ,  G09G2360/16 ,  H04N5/147

摘要： A gray-scale conversion means (10) converts the gray scale of an input video signal (100) as necessary, and outputs the video signal with the converted gray scale. A statistical processing means (13) detects a statistical property of each field or frame of the input video signal; a scene change detection means (16) detects scene changes in the input video signal. A conversion characteristic determination means (22) determines the gray-scale conversion characteristic according to outputs of the statistical processing means (13) and the scene change detection means (16). The gray-scale correction increases contrast regardless of image content, and enables faster response to changes in image content.

摘要翻译： 灰度转换装置（10）根据需要转换输入视频信号（100）的灰度，并输出具有转换灰度级的视频信号。 统计处理装置（13）检测输入视频信号的每个场或帧的统计特性; 场景变化检测装置（16）检测输入视频信号中的场景变化。 转换特性确定装置（22）根据统计处理装置（13）和场景变化检测装置（16）的输出确定灰度转换特性。 无论图像内容如何，​​灰度校正增加对比度，并且能够更快地响应图像内容的变化。

公开(公告)号：US07280709B2

公开(公告)日：2007-10-09

申请号：US10743131

申请日：2003-12-23

申请人： Koji Minami ,  Masako Asamura ,  Chihiro Sakuwa ,  Toshihiro Gai

发明人： Koji Minami ,  Masako Asamura ,  Chihiro Sakuwa ,  Toshihiro Gai

IPC分类号： G06K9/54 ,  H04N1/46 ,  H04N7/01

CPC分类号： H04N7/012 ,  H04N7/0137 ,  H04N7/0142 ,  H04N19/112 ,  H04N19/117 ,  H04N19/132 ,  H04N19/14 ,  H04N19/16 ,  H04N19/59 ,  H04N19/85

摘要： In the conversion of a video signal from interlaced to progressive scanning, the value of each pixel on an interpolated scan line is calculated by a procedure that includes calculating similarity values for pairs of pixel blocks located in point-symmetrical positions on opposite sides of the interpolated pixel; deciding whether similar edges are present in corresponding positions in the two pixel blocks constituting each pixel block pair; selecting an interpolation direction corresponding to the most similar pixel block pair among the pixel block pairs in which the similar edges are present; and using the pixels disposed at or closest to the centers of the two pixel blocks in this pixel block pair as reference pixels. Restricting diagonal interpolation directions to pixel block pairs in which similar edges are present improves the accuracy of the interpolation direction.

摘要翻译： 在将视频信号从隔行扫描转换成逐行扫描时，通过包括计算位于内插的相对侧上的点对称位置的像素块对的相似度的程序来计算内插扫描线上的每个像素的值 像素 确定在构成每个像素块对的两个像素块中的对应位置中是否存在相似的边缘; 选择对应于其中存在相似边缘的像素块对中最相似的像素块对的插值方向; 并且使用设置在该像素块对中的两个像素块的中心处或最靠近的像素作为参考像素。 将对角插值方向限制在其中存在相似边缘的像素块对提高了插值方向的精度。