公开(公告)号：EP0909092A2

公开(公告)日：1999-04-14

申请号：EP98118653.9

申请日：1998-10-02

申请人： Hitachi, Ltd.

发明人： Hirano, Yasuhiro ,  Ishikura, Kazuo ,  Sugiyama, Masato ,  Nakajima, Mitsuo ,  Kurita, Toshiyuki ,  Matono, Takaaki ,  Takata, Haruki

IPC分类号： H04N7/01

CPC分类号： H04N5/46 ,  H04N5/147 ,  H04N7/012 ,  H04N7/014 ,  H04N19/40 ,  H04N19/51 ,  H04N19/587 ,  H04N21/440218

摘要： A method and apparatus for video signal format conversion are provided which can suppress picture quality deterioration by simple signal processing, and produce high-quality pictures with low cost. A motion compensation frame rate converter (2) detects a motion vector BV by using a block unit motion vector estimation block (5), and generates a pixel unit motion vector PV in mini-block units by using a pixel unit motion vector generator (6). A motion compensation interpolated frame generator (7) generates a compensation vector by using a motion compensation vector generator (10) on the basis of this PV, and generates motion compensation signals by using current and previous frame motion compensation signal generators (8) and (9). A motion compensation signal setter (11) produces a frame rate converted signal S4 by generating interpolated frame signals from the average value of both signals when the difference signal between the absolute values of both compensation signals is smaller than a threshold, or from a frame signal closer to an interpolation frame from the time point of view when it is larger than or equal to the threshold.

摘要翻译： 提供了一种用于视频信号格式转换的方法和装置，其可以通过简单的信号处理来抑制图像质量劣化，并且以低成本生产高质量的图像。 运动补偿帧速率转换器（2）通过使用块单元运动矢量估计块（5）来检测运动矢量BV，并且通过使用像素单位运动矢量生成器（6）生成以小块为单位的像素单位运动矢量PV ）。 运动补偿内插帧发生器（7）通过使用基于该PV的运动补偿矢量发生器（10）产生补偿矢量，并且通过使用当前和前一帧运动补偿信号发生器（8）和（ 9）。 运动补偿信号设定器（11）通过在两个补偿信号的绝对值之间的差信号小于阈值时从两个信号的平均值产生内插帧信号，从帧信号 当其大于或等于阈值时，从时间点更接近插值帧。

公开(公告)号：EP0883298A2

公开(公告)日：1998-12-09

申请号：EP98110021.7

申请日：1998-06-02

申请人： Hitachi, Ltd.

发明人： Hirano, Yasuhiro ,  Ishikura, Kazuo ,  Sugiyama, Masato ,  Nakajima, Mitsuo ,  Kurita, Toshiyuki ,  Takata, Haruki ,  Kimura, Shoji ,  Tsuru, Yasutaka ,  Kanehachi, Takashi ,  Matono, Takaaki

IPC分类号： H04N7/01

CPC分类号： H04N7/014 ,  H04N5/145 ,  H04N7/012 ,  H04N19/587

摘要： A system conversion apparatus and method for image signals are disclosed, in which an interlaced scanning image signal S1 is converted into a progressive scanning image signal S2 by an IP converter (1), a block-based motion vector is searched for based on the progressive scanning image signal S2 by a block-based motion vector search unit (5), a motion vector with minimum motion estimation error determined for each mini-block using the block-based motion vector is assigned as a pixel-based motion vector in a mini-block by a pixel-based motion vector generator (6), and an interpolated frame of the image signal is generated using the pixel-based motion vector and a progressive scanning image signal sequence S4 higher in frame frequency is output by a motion compensative interpolated frame generator (7).

摘要翻译： 公开了一种用于图像信号的系统转换装置和方法，其中隔行扫描图像信号S1由IP转换器（1）转换成逐行扫描图像信号S2，基于基于块的运动矢量，基于逐行扫描图像信号 通过基于块的运动矢量搜索单元（5）扫描图像信号S2，使用基于块的运动矢量为每个小块确定最小运动估计误差的运动矢量被分配为基于像素的运动矢量 通过基于像素的运动矢量生成器（6）进行块化，并且使用基于像素的运动矢量生成图像信号的内插帧，并且通过运动补偿插值输出帧频较高的逐行扫描图像信号序列S4 帧发生器（7）。

公开(公告)号：EP0969658B1

公开(公告)日：2006-09-06

申请号：EP99305196.0

申请日：1999-07-01

申请人： Hitachi, Ltd. ,  Hitachi Video & Information System, Inc.

发明人： Kimura, Katsunobu ,  Matono, Takaaki ,  Takata, Haruki ,  Nagata, Tatsuo ,  Sugiyama, Masato ,  Tsuru, Yasutaka ,  Sudo, Koichi

IPC分类号： H04N5/21

CPC分类号： H04N5/21

公开(公告)号：EP0909092A3

公开(公告)日：2000-06-07

申请号：EP98118653.9

申请日：1998-10-02

申请人： Hitachi, Ltd.

发明人： Hirano, Yasuhiro ,  Ishikura, Kazuo ,  Sugiyama, Masato ,  Nakajima, Mitsuo ,  Kurita, Toshiyuki ,  Matono, Takaaki ,  Takata, Haruki

IPC分类号： H04N7/01

CPC分类号： H04N5/46 ,  H04N5/147 ,  H04N7/012 ,  H04N7/014 ,  H04N19/40 ,  H04N19/51 ,  H04N19/587 ,  H04N21/440218

摘要： A method and apparatus for video signal format conversion are provided which can suppress picture quality deterioration by simple signal processing, and produce high-quality pictures with low cost. A motion compensation frame rate converter (2) detects a motion vector BV by using a block unit motion vector estimation block (5), and generates a pixel unit motion vector PV in mini-block units by using a pixel unit motion vector generator (6). A motion compensation interpolated frame generator (7) generates a compensation vector by using a motion compensation vector generator (10) on the basis of this PV, and generates motion compensation signals by using current and previous frame motion compensation signal generators (8) and (9). A motion compensation signal setter (11) produces a frame rate converted signal S4 by generating interpolated frame signals from the average value of both signals when the difference signal between the absolute values of both compensation signals is smaller than a threshold, or from a frame signal closer to an interpolation frame from the time point of view when it is larger than or equal to the threshold.

公开(公告)号：EP0883298A3

公开(公告)日：2000-03-29

申请号：EP98110021.7

申请日：1998-06-02

申请人： Hitachi, Ltd.

发明人： Hirano, Yasuhiro ,  Ishikura, Kazuo ,  Sugiyama, Masato ,  Nakajima, Mitsuo ,  Kurita, Toshiyuki ,  Takata, Haruki ,  Kimura, Shoji ,  Tsuru, Yasutaka ,  Kanehachi, Takashi ,  Matono, Takaaki

IPC分类号： H04N7/01

CPC分类号： H04N7/014 ,  H04N5/145 ,  H04N7/012 ,  H04N19/587

摘要： A system conversion apparatus and method for image signals are disclosed, in which an interlaced scanning image signal S1 is converted into a progressive scanning image signal S2 by an IP converter (1), a block-based motion vector is searched for based on the progressive scanning image signal S2 by a block-based motion vector search unit (5), a motion vector with minimum motion estimation error determined for each mini-block using the block-based motion vector is assigned as a pixel-based motion vector in a mini-block by a pixel-based motion vector generator (6), and an interpolated frame of the image signal is generated using the pixel-based motion vector and a progressive scanning image signal sequence S4 higher in frame frequency is output by a motion compensative interpolated frame generator (7).

公开(公告)号：EP0514819A2

公开(公告)日：1992-11-25

申请号：EP92108375.4

申请日：1992-05-18

申请人： HITACHI, LTD. ,  Hitachi Video & Information System, Inc.

发明人： Takata, Haruki ,  Katsumata, Kenji ,  Hirahata, Shigeru ,  Konno, Mituo ,  Ishibashi, Kouichi ,  Suzuki, Sunao

IPC分类号： H04N5/44

CPC分类号： G06T3/4007 ,  H04N7/0122

摘要： A wide-screen television receiver capable of converting a TV signal of a non-aspect ratio into a signal of a wide aspect ratio which can be displayed on a wide screen of the wide aspect ratio and previously visually informing the user of what part of the image of the non-aspect ratio TV signal is converted in its aspect ratio and displayed on the wide screen. The receiver includes the interpolation scan speed conversion circuit (102), the mode setting circuit (104), the aspect ratio converting circuit (103), the wide cursor adding circuit 105 and the wide display (106). The interpolation scan speed conversion circuit (102) makes a series of processes such as Y/C separation and scan line interpolation for the input video signal supplied via the input terminal (101). The aspect ratio converting circuit (103) compresses the video signal from the interpolation scan speed conversion circuit (102) in the horizontal direction by use of a memory. The magnification processing circuit (109) is provided after the aspect ratio converting circuit (103). This magnification processing circuit (109) magnifies the horizontally compressed video signal so that an arbitrary part of image specified by the mode setting circuit (104) can be magnified at given magnification powers in the horizontal and vertical directions. The wide screen display (106) displays the magnified image of the video signal without horizontal and vertical distortions on the wide screen.

摘要翻译： 宽屏幕电视接收机能够在非宽高比的电视信号转换成宽的宽高比的一个信号，它可以在宽的宽高比的宽屏幕画面上显示与先前在视觉告知的哪一部分的所述用户的 非宽高比电视信号的图像被转换在其纵横比和显示在宽屏幕上。 该接收机包括内插扫描速度变换电路（102），所述模式设置电路（104），纵横比变换电路（103），宽光标加法电路105和宽显示（106）。 内插扫描速度变换电路（102），使一系列的处理：诸如Y / C分离和扫描线内插用于经由所述输入端（101）提供的输入视频信号。 纵横比变换电路（103），压缩从在通过使用存储器的水平方向的内插的扫描速度变换电路（102）的视频信号。 放大处理电路（109）的纵横比变换电路（103）之后提供。 这种放大处理电路（109）放大了水平方向压缩的视频信号也一样，在可以在水平和垂直方向上给定的放大率功率被放大由模式设置电路（104）中指定的图像的任意部分。 宽屏幕显示器（106）显示的视频信号的放大的图像，而不在宽屏幕上水平和垂直失真。

公开(公告)号：EP0630154B2

公开(公告)日：2010-02-24

申请号：EP94109332.0

申请日：1994-06-16

申请人： Hitachi, Ltd.

发明人： Katsumata, Kenji ,  Hirahata, Shigeru ,  Murata, Toshinori ,  Takata, Haruki ,  Torikoshi, Shinobu ,  Eda, Takanori ,  Ishibashi, Kouichi

IPC分类号： H04N5/44

CPC分类号： H04N7/0122 ,  H04N3/27

公开(公告)号：EP2148516A1

公开(公告)日：2010-01-27

申请号：EP09013458.6

申请日：2002-03-08

申请人： Hitachi Ltd.

发明人： Kimura, Katsunobu ,  Matono, Takaaki ,  Takata, Haruki ,  Sakai, Takeshi ,  Kato, Wataru

IPC分类号： H04N9/73

CPC分类号： H04N9/73 ,  G09G5/02 ,  G09G2320/0666

摘要： A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided together with the color temperature correction method for the same so as to visually obtain a desirable white color on display.
The signal processing circuit for the color temperature correction according to this invention comprises an A/D converter to convert the video signals as input into digitalized signals, a matrix circuit to convert the digitalized signals as output from said A/D converter into luminance signals and at least two color difference signals, a hue conversion circuit to obtain hue signals from the color difference signals as output from said matrix circuit, a hue correction circuit to correct said hue signals, a chroma saturation conversion circuit to obtain chroma saturation signals from said color difference signals, a chroma saturation correction circuit to correct said chroma saturation signals and a color temperature correction circuit to perform the color temperature correction on the respective hue and chroma saturation signals as corrected.

摘要翻译： 提供一种视频显示装置，该视频显示装置允许以高精度校正具有高亮度和低色度的白色属性中的信号的色温，并与色温校正方法一起为其提供视觉获得期望的白色 展示中。 根据本发明的用于色温校正的信号处理电路包括：A / D转换器，用于将作为输入的视频信号转换为数字化信号;矩阵电路，用于将从所述A / D转换器输出的数字化信号转换成亮度信号;以及 至少两个色差信号;色调转换电路，从所述矩阵电路输出的色差信号中获得色调信号;色调校正电路，校正所述色调信号;色度转换电路，从所述色彩获得色度饱和信号 差值信号;色度饱和度校正电路，用于校正所述色度饱和度信号;以及色温度校正电路，用于对校正后的各个色调和色度饱和度信号执行色温度校正。

公开(公告)号：EP0837601B1

公开(公告)日：2004-12-22

申请号：EP97117877.7

申请日：1997-10-15

申请人： Hitachi, Ltd.

发明人： Hirano, Yasuhiro ,  Ishikura, Kazuo ,  Sugiyama, Masato ,  Nakajima, Mitsuo ,  Kimura, Shoji ,  Kurita, Toshiyuki ,  Itagaki, Tsuguo ,  Takata, Haruki

IPC分类号： H04N5/44

CPC分类号： G06T3/4007 ,  H04N7/012 ,  H04N7/0122

公开(公告)号：EP0969658A1

公开(公告)日：2000-01-05

申请号：EP99305196.0

申请日：1999-07-01

申请人： HITACHI, LTD. ,  Hitachi Video & Information System, Inc.

发明人： Kimura, Katsunobu ,  Matono, Takaaki ,  Takata, Haruki ,  Nagata, Tatsuo ,  Sugiyama, Masato ,  Tsuru, Yasutaka ,  Sudo, Koichi

IPC分类号： H04N5/21

CPC分类号： H04N5/21

摘要： The present invention provides a noise reduction signal processing apparatus for reducing noise accurately. The feature of a present invention is in the following structure. That is, a noise reduction signal processing circuit is used for a display apparatus for displaying a video signal, comprising: a median filter (40) to which is inputted the video signal, and which executes a filter processing to the inputted video signal and outputs a reference signal; a subtracter (50) which is connected with the median filter (40), and which outputs a difference signal that indicates the difference between the reference signal outputted from the median filter (40) and the video signal; a minimum value detection circuit (70) which outputs the difference signal from the subtracter (50) or a limitation value, whichever is smaller, as a minimum value signal; and an adder (35) which adds a noise reduction signal on the basis of the minimum value signal output from the minimum value, detection circuit (70) and the video signal.

摘要翻译： 本发明提供了一种用于精确降低噪声的降噪信号处理装置。 本发明的特征在于以下结构。 也就是说，降噪信号处理电路用于显示视频信号的显示装置，包括：输入视频信号的中值滤波器（40），并对输入的视频信号执行滤波处理，并输出 参考信号; 减法器（50），其与中值滤波器（40）连接，并输出指示从中值滤波器（40）输出的参考信号与视频信号之间的差的差分信号; 将来自减法器（50）的差分信号或限制值（较小者）作为最小值信号输出的最小值检测电路（70） 以及加法器（35），其根据从最小值输出的最小值信号，检测电路（70）和视频信号相加噪声降低信号。