公开(公告)号：US5666165A

公开(公告)日：1997-09-09

申请号：US361634

申请日：1994-12-22

申请人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshiohika Sato

发明人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshiohika Sato

IPC分类号： H04N5/14 ,  H04N5/44 ,  H04N7/01 ,  H04N5/262

CPC分类号： H04N7/0122 ,  H04N5/14 ,  Y10S348/913

摘要： A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center part of a picture can be horizontally compressed. A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position of the picture can also be changed.

公开(公告)号：US5459525A

公开(公告)日：1995-10-17

申请号：US103456

申请日：1993-08-06

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： H04N5/21 ,  H04N5/44 ,  H04N7/01 ,  H04N11/20

CPC分类号： H04N7/0122 ,  H04N5/21

摘要： An apparatus for converting an input video signal to a modified video signal comprises a memory for storing data corresponding to the input video signal, an address signal generating device for reading data from the memory and an interpolating filter for interpolating the data read from the memory to obtain a modified video signal. The data are stored and read from the memory using a clock having a predetermined frequency. However, since the number of addresses being read in one horizontal display varies with the conversion rate of video signals, the length of one horizontal display of the modified video signal is different from that of the input video signal.

摘要翻译： 用于将输入视频信号转换为修改的视频信号的装置包括用于存储对应于输入视频信号的数据的存储器，用于从存储器读取数据的地址信号产生装置和用于内插从存储器读取的数据的内插滤波器 获得修改后的视频信号。 使用具有预定频率的时钟从存储器存储和读取数据。 然而，由于在一个水平显示器中读取的地址的数量随着视频信号的转换速率而变化，所以修改的视频信号的一个水平显示的长度不同于输入视频信号的一个水平显示的长度。

公开(公告)号：US5247361A

公开(公告)日：1993-09-21

申请号：US857238

申请日：1992-03-25

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： H04N5/208

CPC分类号： H04N5/208

摘要： An outline enhancing device for enhancing an outline of an image formed by a video signal having a rising and falling slope portions and a flat portion includes an enhancing signal producing circuit for producing an enhancing signal having a first, a second, and a third enhancing waveforms which wavelengths are the same as those of three portions of the video signal, respectively. A delay circuit is provided for delaying the video signal to be synchronized with the enhancing signal. A subtracter is further provided for subtracting the enhancing signal from the synchronized video signal such that three enhancing wavesforms are exactly superimposed on the rising slope, the falling slope and the flat portions, respectively, without any interference to the neighboring slopes or portion. As a result of such subtraction, the gradients of the rising and falling slopes are made large while the flat portion is extended. Thus, the outline in the video signal is enhanced without preshoots or overshoots around the outline.

公开(公告)号：US5715010A

公开(公告)日：1998-02-03

申请号：US725075

申请日：1996-10-02

申请人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshichika Sato

发明人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshichika Sato

IPC分类号： H04N5/14 ,  H04N5/44 ,  H04N7/01

CPC分类号： H04N7/0122 ,  H04N5/14 ,  Y10S348/913

摘要： A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center part of a picture can be horizontally compressed. A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position of the picture can also be changed.

摘要翻译： 视频信号压缩装置以每个系统时钟脉冲提取在只读存储器中写入的特定值。 每个时钟脉冲可以改变具体值。 因此，例如只能将图像的中央部分水平地压缩。 可以使用FIFO存储器。 可以选择具有固定压缩比的模式或压缩比在每个时钟脉冲下变化的模式。 此外，可以从外部设定固定压缩比。 图片的显示位置也可以更改。

公开(公告)号：US5500682A

公开(公告)日：1996-03-19

申请号：US386134

申请日：1995-02-06

申请人： Kouichirou Fue ,  Yosuke Izawa ,  Naoji Okumura

发明人： Kouichirou Fue ,  Yosuke Izawa ,  Naoji Okumura

IPC分类号： H04N5/907 ,  H04N5/95

CPC分类号： H04N5/907 ,  H04N5/95

摘要： The invention relates to a video signal memory equipment comprising a FIFO memory for storing video data of video signals, and a control unit for controlling writing and reading in the FIFO memory, wherein the control unit receives a horizontal synchronizing signal of video signal in video data writing action, writes a specified number of video data from the beginning of video data of brightness signals of the horizontal scanning period sequentially into the FIFO memory, and reads out the specified number of video data upon every input of horizontal synchronizing signal, in video data reading action, in the written sequence as video data of that horizontal scanning period, thereby storing and producing the video data of video signals, whereby video data of each horizontal scanning period of video signals are continuously written into the FIFO memory by every specified number of pieces from the beginning, and are read out by every specified number of pieces upon every input of horizontal synchronizing signal, and hence the video data of video signals can be read out by dividing in every horizontal scanning period, and therefore the address generating device for dividing the data in every horizontal scanning period is not needed in this video signal memory equipment.

摘要翻译： 本发明涉及一种包括用于存储视频信号的视频数据的FIFO存储器和用于控制FIFO存储器中的写入和读取的控制单元的视频信号存储设备，其中控制单元接收视频数据中的视频信号的水平同步信号 写入动作，将从水平扫描周期的亮度信号的视频数据的开头开始的指定数量的视频数据顺序写入FIFO存储器，并且在视频数据中每次输入水平同步信号时读出指定数量的视频数据 读取动作，作为该水平扫描期间的视频数据，从而存储和产生视频信号的视频数据，由此每个指定数量的视频信号的每个水平扫描周期的视频数据被连续地写入FIFO存储器 从一开始就开始，每次在每次投入的时候都会读出每个指定的数量 l同步信号，因此可以通过在每个水平扫描周期中除以来读出视频信号的视频数据，因此在该视频信号存储设备中不需要用于在每个水平扫描周期中划分数据的地址产生装置。

公开(公告)号：US5296941A

公开(公告)日：1994-03-22

申请号：US992646

申请日：1992-12-18

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： G09G5/00 ,  G09G5/10 ,  H04N5/20 ,  H04N5/66 ,  H04N1/40

CPC分类号： H04N5/20

摘要： A level of an input luminance signal for a pixel is compared with step values which change stepwise in level in a predetermined range of level, and distribution of the levels of the input luminance signal in the predetermined range of level is represented by a cumulative histogram. Subsequently, a histogram value is derived from the outline of the cumulative histogram, and a compensation value is produced on the basis of the histogram value, and the compensation value is added to the input luminance signal, and hence a compensated luminance signal is output to control the luminance of a video image.

摘要翻译： 将像素的输入亮度信号的电平与在预定电平范围内逐级变化的阶跃值进行比较，并且在预定范围内的输入亮度信号的电平分布由累积直方图表示。 随后，从累积直方图的轮廓导出直方图值，并且基于直方图值产生补偿值，并将补偿值加到输入亮度信号上，因此补偿亮度信号被输出到 控制视频图像的亮度。

公开(公告)号：US5359369A

公开(公告)日：1994-10-25

申请号：US59910

申请日：1993-05-10

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： H04N5/202 ,  H04N5/45 ,  H04N5/66 ,  H04N5/57

CPC分类号： H04N5/45 ,  H04N5/202

摘要： A gradation correcting apparatus, which can be effectively incorporated into various video devices, enables the display of a sub-display within the domain of main-display (i.e. Picture in Picture) and also enables automatic adjustment of each gradation of the display dependent on the characteristics of the respective input signal. By using both a window pulse and a main- and sub-display switching signal, gradation corrections of the displays are carried out such that either no gradation correction is applied to the sub-display or a proper correction is applied according only to the sub-display signal. In this apparatus, the luminance information related to the sub-display and the luminance information related to the main-display excluding that of the sub-display are independently inputted into a signal correction system, thereby allowing individual processing of this information. Moreover, since the signal delay caused by the arithmetic processing can be precisely compensated for by a delay device, the gradation corrections for the main- and sub-displays are exactly executed according to the respective luminance level information, thus realizing an easy-to-see Picture in a Picture.

摘要翻译： 可以有效地结合到各种视频装置中的灰度校正装置使得能够在主显示器的领域（即，画中画）中显示子显示器，并且还能够依赖于显示器来自动调整显示器的每个等级 各个输入信号的特性。 通过使用窗口脉冲和主显示切换信号和副显示切换信号，执行显示的灰度校正，使得不对灰度校正应用或者仅根据子显示器应用适当的校正， 显示信号。 在该装置中，与子显示有关的亮度信息和与主显示器相关的亮度信息不包括子显示器的亮度信息被独立地输入到信号校正系统中，从而允许对该信息进行单独处理。 此外，由于可以通过延迟装置精确地补偿由算术处理引起的信号延迟，因此根据各个亮度级别信息精确地执行主显示和副显示的灰度校正，从而实现易于使用， 看图片中的图片。

公开(公告)号：US5315389A

公开(公告)日：1994-05-24

申请号：US904214

申请日：1992-06-25

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： G09G5/00 ,  G06T5/40 ,  G09G5/06 ,  G09G5/10 ,  H04N5/20 ,  H04N5/57 ,  H04N5/208

CPC分类号： G06T5/009 ,  G06T5/40 ,  H04N5/20

摘要： The invention relates to an intensity correction device for automatically adjusting an intensity of an input video signal by detecting luminance characteristics of the input signal, and provide intensity correction with maintaining clear image by reducing magnitude of the correction signal or by not effecting correction when the luminance level of the input luminance signal is concentrated to a certain luminance level. The intensity correction device includes a histogram memory, a look-up table operating circuit, a look-up table, a maximum value detecting circuit, and an inverter and a multiplier, limiter, or a gain control circuit. By this, when a luminance level of the input video signal is concentrated to a certain luminance level, magnitude of the correction signal can be reduced or made zero. Therefore, by detecting the characteristics of the input image, the intensity of the input video signal can be automatically corrected to the optimal image for providing better picture quality.

摘要翻译： 本发明涉及一种强度校正装置，用于通过检测输入信号的亮度特性来自动调节输入视频信号的强度，并且通过减小校正信号的大小或通过在亮度 输入亮度信号的电平集中在一定亮度级。 强度校正装置包括直方图存储器，查找表操作电路，查找表，最大值检测电路和反相器以及乘法器，限幅器或增益控制电路。 由此，当输入视频信号的亮度级别集中在一定亮度级时，校正信号的大小可以减小或为零。 因此，通过检测输入图像的特性，可以将输入视频信号的强度自动校正为最佳图像，以提供更好的图像质量。

公开(公告)号：US5760837A

公开(公告)日：1998-06-02

申请号：US720678

申请日：1996-10-02

申请人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshichika Sato

发明人： Yosuke Izawa ,  Masahiro Tani ,  Naoji Okumura ,  Yutaka Nio ,  Toshichika Sato

IPC分类号： H04N5/14 ,  H04N5/44 ,  H04N7/01

CPC分类号： H04N7/0122 ,  H04N5/14 ,  Y10S348/913

摘要： A video signal compression apparatus extracts a specific value written in a read only memory at every system clock pulse. The specific value can be varied at every clock pulse. Therefore, for example, only the center cart of a picture can be horizontally compressed A FIFO memory may be used. It is possible to select a mode with a fixed compression ratio or a mode in which a compression ratio varies at every clock pulse. Further, the fixed compression ratio can be set from the outside. Display position or the picture can also be changed.

摘要翻译： 视频信号压缩装置以每个系统时钟脉冲提取在只读存储器中写入的特定值。 每个时钟脉冲可以改变具体值。 因此，例如，只能将图像的中央推车水平压缩。可以使用FIFO存储器。 可以选择具有固定压缩比的模式或压缩比在每个时钟脉冲下变化的模式。 此外，可以从外部设定固定压缩比。 显示位置或图片也可以更改。

公开(公告)号：US5394194A

公开(公告)日：1995-02-28

申请号：US9878

申请日：1993-01-27

申请人： Yosuke Izawa ,  Naoji Okumura

发明人： Yosuke Izawa ,  Naoji Okumura

IPC分类号： H03G3/20 ,  H04N5/20 ,  H04N5/57 ,  H04N5/52

CPC分类号： H04N5/20

摘要： A small scale gain control circuit for controlling gain correction quantity is realized, using the configuration of an inverter, a subtraction circuit, a limiter, and a multiplication circuit. Gain correction quantity is controlled in such a way that in the gradation correcting apparatus a first constant fixes a value beyond which gain correction quantity is zero and a second constant fixes an inclination of the characteristics line.

摘要翻译： 使用逆变器，减法电路，限幅器和乘法电路的结构，实现用于控制增益校正量的小型增益控制电路。 控制增益校正量，使得在灰度校正装置中，第一常数固定增益校正量为零以上的值，第二常数固定特性线的倾斜度。