公开(公告)号：US4213154A

公开(公告)日：1980-07-15

申请号：US930505

申请日：1978-08-03

申请人： Fumitaka Ono ,  Takayoshi Semasa ,  Yutaka Ueno ,  Syuzi Iwata ,  Ryoichi Ohnishi

发明人： Fumitaka Ono ,  Takayoshi Semasa ,  Yutaka Ueno ,  Syuzi Iwata ,  Ryoichi Ohnishi

IPC分类号： H04N1/417 ,  H04N7/12

CPC分类号： H04N1/417

摘要： Binary signals from picture elements arranged in rows and columns of the subject copy are successively applied to a group of shift registers and suitably time-delayed under the control of clock pulses so that the signals from reference picture elements for each object picture element simultaneously enter two logic circuits provided for a high and low scanning resolution. The logic circuits calculate predicted values for each object element following respective prediction functions. That circuit for the scanning resolution used delivers the predicted value to an exclusive OR gate also supplied with the actual signal from the same object element. Each time the gate determines a discord with the prediction, a coder delivers coded serial signals having predetermined variable lengths dependent upon the number of pulses counted up to that time by the coder. Also by referring to a picture element or elements farther distant from the object element, generized prediction functions are disclosed.

摘要翻译： 来自被摄体拷贝的列和列的图像元素的二进制信号在时钟脉冲的控制下被连续地应用于一组移位寄存器并适当时间延迟，使得来自每个对象象素的参考图像元素的信号同时进入两个 提供高和低扫描分辨率的逻辑电路。 逻辑电路根据各个预测函数计算每个对象元素的预测值。 用于所用扫描分辨率的电路将预测值传送到也提供有来自同一对象元件的实际信号的异或门。 每当门确定与预测的不一致时，编码器根据由编码器直到该时间计数的脉冲数量递送具有预定可变长度的编码串行信号。 另外，通过参照远离对象元素的像素或元素，公开了预测函数。

公开(公告)号：US4926245A

公开(公告)日：1990-05-15

申请号：US212537

申请日：1988-06-28

申请人： Yutaka Ueno ,  Lawrence D. Emmons ,  Koji Kaneko ,  Takayoshi Semasa

发明人： Yutaka Ueno ,  Lawrence D. Emmons ,  Koji Kaneko ,  Takayoshi Semasa

IPC分类号： H04N7/14 ,  H04J11/00 ,  H04N11/02 ,  H04N11/06

CPC分类号： H04N11/06

摘要： The present invention provides a QAM modulation scheme compatible with a single channel demodulator. The inphase (I) channel is provided with luminance information encoded on a series of sine wave symbols. The quadrature (Q) channel is used for color difference values with a sine or cosine symbol being used for each color difference value. Alternate ones of these color difference symbols are inverted so that, on the average, their effect on the I channel zero-crossings simply cancels out. Thus, when sent to a single channel demodulator which expects a black and white picture, the quadrature channel will be filtered out; leaving luminance information which will be decoded as a black and white picture. The color information does not disturb the zero crossings of the luminance signal on an averaged basis, allowing the carrier recovery phase lock loop to maintain synchronization for demodulation purposes. When received by a QAM demodulator, the color difference values are recovered on the Q channel, to give a color picture. In one embodiment, the cosine symbols on the channel are offset with a positive or negative DC value, depending on whether the symbol is inverted, to shift the Q channel zero-crossings so they are aligned with the I channel zero-crossings.

摘要翻译： 本发明提供了与单信道解调器兼容的QAM调制方案。 同相（I）通道具有编码在一系列正弦波符号上的亮度信息。 正交（Q）通道用于色差值，正弦或余弦符号用于每个色差值。 这些色差符号中的其他替代的符号被反转，使得平均而言，它们对I通道过零点的影响简单地消除。 因此，当发送到期望黑白图像的单通道解调器时，正交通道将被滤除; 留下将被解码为黑白图像的亮度信息。 颜色信息不会平均地干扰亮度信号的过零点，从而允许载波恢复锁相环保持用于解调目的的同步。 当由QAM解调器接收时，在Q通道上恢复色差值，以给出彩色图像。 在一个实施例中，取决于符号是否被反转，信道上的余弦符号以正或负DC值偏移，以移位Q信道过零点，使得它们与I信道过零点对齐。

公开(公告)号：US5063587A

公开(公告)日：1991-11-05

申请号：US500890

申请日：1990-03-29

申请人： Takayoshi Semasa ,  Yutaka Ueno

发明人： Takayoshi Semasa ,  Yutaka Ueno

IPC分类号： H04M11/06 ,  H04N7/12 ,  H04N7/14

CPC分类号： H04N7/147 ,  H04M11/062 ,  H04N7/12 ,  H04N7/148

摘要： A still-picture TV telephone system for transmitting and receiving, via a telephone circuit, a still picture taken by a camera; a picture signal stored in a memory is modulated in phase and amplitude digitally and is offered or supplied to the telephone circuit during talking in voice. To superposing the talk in voice also during offering of the picture signal, the voice and picture signals are divided by frequency band. The frequency band of the voice signal is partially restricted, and the picture signal is inserted in the omitted band, during which time the picture signal is restricted in band by setting the band rate frequency to be lower than the carrier signal frequency when modulating the phase and amplitude. The picture signal is further restricted in band by a low-pass filter so that the voice and picture signals are separated by band so as not to overlap each other at the same frequency band.

公开(公告)号：US4191974A

公开(公告)日：1980-03-04

申请号：US875909

申请日：1978-02-07

申请人： Fumitaka Ono ,  Takayoshi Semasa ,  Yutaka Ueno ,  Shuzi Iwata

发明人： Fumitaka Ono ,  Takayoshi Semasa ,  Yutaka Ueno ,  Shuzi Iwata

IPC分类号： G06T9/00 ,  H04N1/417 ,  H04N1/00

CPC分类号： H04N1/417 ,  G06T9/004

摘要： Binary 0's and 1's from picture elements in each line are counted with respect to each mode determined by adjacent picture elements to form symbol patterns determined by both the counts and the information content of a memory. Each pattern is encoded into a code word to be transmitted having a bit number determined by the arrangement of binary symbols included in it. Also the code words can be transmitted on the basis of address numbers of picture elements, starting with the output from a coder associated with a mode having the two-valued signal with the least address number.

摘要翻译： 对于由相邻图像元素确定的每个模式，对每行中的图像元素的二进制0和1进行计数，以形成由存储器的计数和信息内容确定的符号模式。 每个图案被编码成要被发送的码字，其具有由其中包括的二进制符号的排列确定的比特数。 此外，可以基于图像元素的地址号发送码字，从与具有最小地址号的二值信号的模式相关联的编码器的输出开始。

公开(公告)号：US06898322B2

公开(公告)日：2005-05-24

申请号：US10096944

申请日：2002-03-14

申请人： Takayoshi Semasa

发明人： Takayoshi Semasa

IPC分类号： H04N19/50 ,  H03M7/36 ,  H04N1/41 ,  H04N19/124 ,  H04N19/132 ,  H04N19/134 ,  H04N19/136 ,  H04N19/137 ,  H04N19/147 ,  H04N19/182 ,  H04N19/186 ,  H04N19/196 ,  H04N19/27 ,  H04N19/59 ,  H04N19/593 ,  H04N19/91 ,  G06K9/36

CPC分类号： H04N1/41 ,  H04N19/124 ,  H04N19/13 ,  H04N19/132 ,  H04N19/136 ,  H04N19/147 ,  H04N19/149 ,  H04N19/169 ,  H04N19/186 ,  H04N19/46 ,  H04N19/59 ,  H04N19/593

摘要： A coding apparatus includes: a context generator generating a context signal from a reconstructed symbol; a predictor generating a prediction signal indicating a prediction value which is a prediction of a symbol to be coded, based on the context signal, and a prediction error signal which is a difference between the prediction value and the symbol; a quantizer generating a quantized prediction error signal by quantizing the prediction error signal; an encoder coding the quantized prediction error signal by referring to the context signal; an inverse quantizer subjecting the quantized prediction error signal to inverse quantization so as to generate a reconstructed prediction error signal; an inverse predictor subjecting the reconstructed prediction error signal to inverse prediction so as to generate a reconstructed sampled signal; a subsampling control circuit generating a subsampling control signal indicating whether or not the symbol should be subject to subsampling; and an interpolator referring to the subsampling control signal so as to subject to interpolation the reconstructed sampled signal corresponding to the symbol subject to subsampling, wherein the coding apparatus codes symbols while adaptively employing subsampling.

摘要翻译： 一种编码装置，包括：上下文生成器，生成来自重构符号的上下文信号; 基于上下文信号生成表示作为要编码的符号的预测的预测值的预测信号的预测器，以及作为预测值与符号之间的差的预测误差信号; 量化器，通过量化预测误差信号来产生量化的预测误差信号; 通过参照上下文信号对量化的预测误差信号进行编码的编码器; 对量化的预测误差信号进行逆量化的逆量化器，以产生重建的预测误差信号; 反演预测器对重建的预测误差信号进行逆预测，以产生重构的采样信号; 生成子采样控制信号的子采样控制电路，其指示符号是否应进行二次采样; 以及参照子采样控制信号的内插器，以便对与经过子采样的符号相对应的重构采样信号进行插值，其中编码装置在自适应地采用二次采样的同时对符号进行编码。

公开(公告)号：US5291309A

公开(公告)日：1994-03-01

申请号：US825973

申请日：1992-01-27

申请人： Takayoshi Semasa

发明人： Takayoshi Semasa

IPC分类号： H04N1/40 ,  H04N1/405

CPC分类号： H04N1/40062 ,  H04N1/40075 ,  H04N1/4053

摘要： An image processing apparatus for outputting an image which contains different kinds of multi-level signals for letters, figures, photographs, screened-halftone, etc. The apparatus comprises a screened-halftone pattern detecting circuit and a continuous-tone pattern detecting circuit for detecting a screened-halftone pattern and a continuous-tone pattern, respectively, by using neighboring pixels of the target pixel, counters for counting UP/DOWN in accordance with the outputs of the detecting circuits, a filter for switching the filtering coefficients of the image signal in multiple stages in accordance with the outputs of the counters and a quantizer for bi-level-quantizing the output of the filter. It is thus possible to produce an image having a good quality free from deterioration due to the rapid switching of region judgements and bi-level-quantizing methods.

摘要翻译： 一种用于输出包含用于字母，图形，照片，筛选半色调等的不同种类的多级信号的图像的图像处理装置。该装置包括屏幕半色调图案检测电路和用于检测的连续色调图案检测电路 通过使用目标像素的相邻像素分别设置屏幕半色调图案和连续色调图案，用于根据检测电路的输出对UP / DOWN进行计数的计数器，用于切换图像信号的滤波系数的滤波器 根据计数器的输出和用于对滤波器的输出进行双电平量化的量化器在多个级中。 因此，可以通过区域判断和双电平量化方法的快速切换来产生具有良好质量的图像，而不会劣化。

公开(公告)号：US5418626A

公开(公告)日：1995-05-23

申请号：US32810

申请日：1993-03-17

申请人： Takayoshi Semasa

发明人： Takayoshi Semasa

IPC分类号： H04N1/393 ,  G06T3/40 ,  H04N1/40 ,  H04N1/405

CPC分类号： G06T3/40 ,  H04N1/40075 ,  H04N1/4052

摘要： An image processing device for effecting resolution conversion includes an image signal memory (1) for storing the input pixel levels I.sub.xy, and an enlargement/reduction calculator circuit (2) for calculating a grey level G.sub.XY of each output pixel corresponding to the average of the areas of input pixel intersecting with the output pixel. The error occurring upon quantization by a quantizer (4) is calculated by an error calculator (5), and, after being delayed by one pixel by an error memory (6), is fed back to a image signal compensator circuit (3) to be added to the grey level S3 to obtain the compensated gray level S4, which is quantized by the quantizer (4) to obtain the quantized level O.sub.XY.

摘要翻译： 用于进行分辨率转换的图像处理装置包括用于存储输入像素级别Ixy的图像信号存储器（1）和用于计算与平均值相对应的每个输出像素的灰度级GXY的放大/缩小计算器电路（2） 输入像素与输出像素相交的区域。 通过误差计算器（5）计算由量化器（4）进行量化时发生的误差，并且在通过误差存储器（6）被延迟了一个像素之后被反馈到图像信号补偿器电路（3）至 被添加到灰度级S3以获得由量化器（4）量化以获得量化电平OXY的补偿灰度级S4。

公开(公告)号：US4996602A

公开(公告)日：1991-02-26

申请号：US355345

申请日：1989-05-23

申请人： Fumitaka Ono ,  Takayoshi Semasa

发明人： Fumitaka Ono ,  Takayoshi Semasa

IPC分类号： H04N1/405 ,  G06T5/00 ,  H04N1/40

CPC分类号： H04N1/40062

摘要： An input gray-scale image is converted to a bilevel output signal by an image-processing apparatus with two binarizing circuits: one employing a uniform threshold and the other a dither matrix. The outputs of these circuits are selected for each pixel by deciding whether the pixel is a bilevel pixel or a gray-scale pixel. The decision is based on the maximum and minimum gray levels in a block of pixels centered on the pixel in question. Images having both bilevel and gray-scale parts can thus be binarized with clean reproduction of black-white edges.

公开(公告)号：US06337724B1

公开(公告)日：2002-01-08

申请号：US08759626

申请日：1996-12-05

申请人： Toshio Itoh ,  Haruhiko Nagai ,  Tsunehiro Imamura ,  Takayoshi Semasa ,  Kenji Tatsumi ,  Shuji Iwata ,  Hiroshi Mitsuda ,  Yasuhito Myoi ,  Toshimasa Tomoda ,  Fumio Suzuki ,  Yoshisuke Ohtsuru

发明人： Toshio Itoh ,  Haruhiko Nagai ,  Tsunehiro Imamura ,  Takayoshi Semasa ,  Kenji Tatsumi ,  Shuji Iwata ,  Hiroshi Mitsuda ,  Yasuhito Myoi ,  Toshimasa Tomoda ,  Fumio Suzuki ,  Yoshisuke Ohtsuru

IPC分类号： G02F11335

CPC分类号： H04N9/12 ,  G09G2300/026

摘要： A plurality of liquid crystal modules is vertically and horizontally arranged, each of which is supplied light by a light source via optical fibers. A screen can be wound up at a cabinet. An image from each of the plurality of liquid crystal modules does not interfere one another because a light shielding board is installed.

摘要翻译： 垂直和水平布置多个液晶模块，每个液晶模块通过光纤由光源供给光。 屏幕可以在柜子上卷起。 由于安装了遮光板，来自多个液晶模块中的每一个的图像不会彼此干涉。

公开(公告)号：US5361142A

公开(公告)日：1994-11-01

申请号：US162580

申请日：1993-12-03

申请人： Takayoshi Semasa

发明人： Takayoshi Semasa

IPC分类号： H04N1/40 ,  H04N1/405

CPC分类号： H04N1/40062 ,  H04N1/40075 ,  H04N1/4053

摘要： An image processing apparatus for outputting an image which contains different kinds of multi-level signals for letters, figures, photographs, screened-halftone, etc. The apparatus comprises a screened-halftone pattern detecting circuit and a continuous-tone pattern detecting circuit for detecting a screened-halftone pattern and a continuous-tone pattern, respectively, by using neighboring pixels of the target pixel, counters for counting UP/DOWN in accordance with the outputs of the detecting circuits, a filter for switching the filtering coefficients of the image signal in multiple stages in accordance with the outputs of the counters and a quantizer for bi-level-quantizing the output of the filter. It is thus possible to produce an image having a good quality free from deterioration due to the rapid switching of region judgements and bi-level-quantizing methods.