公开(公告)号：US4847550A

公开(公告)日：1989-07-11

申请号：US143802

申请日：1988-01-14

申请人： Satoshi Tanaka ,  Hirotoshi Tanaka ,  Taizo Kinoshita ,  Nobuo Kotera ,  Minoru Nagata ,  Kiichi Yamashita ,  Tomoyuki Watanabe

发明人： Satoshi Tanaka ,  Hirotoshi Tanaka ,  Taizo Kinoshita ,  Nobuo Kotera ,  Minoru Nagata ,  Kiichi Yamashita ,  Tomoyuki Watanabe

IPC分类号： G05F3/24

CPC分类号： G05F3/245 ,  G05F3/247

摘要： A constant voltage circuit according to this invention comprises first means attenuating or dividing fluctuating voltage and an amplifying FET, to the gate of which the output attenuated or divided by the first means is applied and whose drain is connected with the fluctuating voltage through load means. The attenuation ratio or division ratio of the first means, the mutual conductance of the amplifying FET and the impedance of the load means are so set that the voltage drop across the load means cancels the fluctuating amount of the fluctuating voltage. Consequently an output voltage, which is maintained substantially constant, is obtained at the drain of the amplifying FET, independently of fluctuations in the fluctuating voltage, and thus a constant voltage circuit can be obtained. A constant current circuit according to this invention utilizes the constant voltage circuit described above. The output voltage of the constant voltage circuit is supplied to the gate of the constant current FET. Consequently a current, which is maintained substantially constant, flows through the drain-source path of this constant current FET and thus a constant current circuit can be obtained.

公开(公告)号：US4857769A

公开(公告)日：1989-08-15

申请号：US143385

申请日：1988-01-13

申请人： Nobuo Kotera ,  Kiichi Yamashita ,  Taizo Kinoshita ,  Hirotoshi Tanaka ,  Satoshi Tanaka ,  Minoru Nagata

发明人： Nobuo Kotera ,  Kiichi Yamashita ,  Taizo Kinoshita ,  Hirotoshi Tanaka ,  Satoshi Tanaka ,  Minoru Nagata

IPC分类号： H03K19/003

CPC分类号： H03K19/00384

摘要： This invention relates to a threshold voltage detection circuit for detecting the threshold voltage of field effect transistors (FETs) and to a semiconductor circuit capable of a stable operation irrespective of the fluctuation of the threshold voltage by utilizing this threshold voltage detection circuit. The source-drain path of first FET is connected in series with that of second FET having substantially the same threshold voltage as that of the first FET and the conductances of these first and second FETs are set to a predetermined ratio to generate a voltage drop associated with the threshold voltage in the first FET. This voltage drop can be used for detecting the threshold voltage and for level-shifting. The output of the series connection of the first and second FETs is applied to the gate of a constant current FET having the same threshold voltage as that of the first and second FETs and the drain current of the constant current FET can thus be set irrespective of the fluctuation of the threshold voltage.

摘要翻译： 本发明涉及一种阈值电压检测电路，用于通过利用该阈值电压检测电路来检测场效应晶体管（FET）的阈值电压和能够稳定工作的半导体电路，而与阈值电压的波动无关。 第一FET的源极 - 漏极路径与具有与第一FET基本相同的阈值电压的第二FET的源极 - 漏极路径串联连接，并且将这些第一和第二FET的电导设置为预定的比率以产生相关的电压降 与第一FET中的阈值电压。 该电压降可用于检测阈值电压和电平转换。 第一和第二FET的串联连接的输出被施加到具有与第一和第二FET相同的阈值电压的恒流FET的栅极，因此可以设定恒定电流FET的漏极电流，而不管 阈值电压的波动。

公开(公告)号：US4825145A

公开(公告)日：1989-04-25

申请号：US133914

申请日：1987-12-16

申请人： Hirotoshi Tanaka ,  Satoshi Tanaka ,  Taizo Kinoshita ,  Nobuo Kotera ,  Minoru Nagata

发明人： Hirotoshi Tanaka ,  Satoshi Tanaka ,  Taizo Kinoshita ,  Nobuo Kotera ,  Minoru Nagata

IPC分类号： G05F3/24

CPC分类号： G05F3/247

摘要： A constant current circuit includes a first FET providing an input reference current flow, a second FET providing an output current flow and a non-linear impedance element connected between the drain and the gate of the first FET. By setting a parameter of the non-linear impedance element and a parameter of the first FET to have a specific relationship with each other, the output current can be maintained at a substantially definite value irrespective of relatively large variations of the input reference current.

摘要翻译： 恒流电路包括提供输入参考电流的第一FET，提供输出电流的第二FET和连接在第一FET的漏极和栅极之间的非线性阻抗元件。 通过将非线性阻抗元件的参数和第一FET的参数设置为具有特定的关系，输出电流可以保持在基本上确定的值，而与输入参考电流的相对大的变化无关。

公开(公告)号：US4881044A

公开(公告)日：1989-11-14

申请号：US139790

申请日：1987-12-30

申请人： Taizo Kinoshita ,  Satoshi Tanaka ,  Hirotoshi Tanaka ,  Nobuo Kotera ,  Minoru Nagata

发明人： Taizo Kinoshita ,  Satoshi Tanaka ,  Hirotoshi Tanaka ,  Nobuo Kotera ,  Minoru Nagata

IPC分类号： H03F3/45

CPC分类号： H03F3/45385

摘要： A wide-band and high-gain differential amplifier adapted to amplifying transmitted optical signals of the GHz band is constituted by GaAs MESFET's.Two MESFET's Q1 and Q2 are differentially connected to each other. Drains of Q1 and Q2 are connected to load resistances R.sub.L and R.sub.L via a source-drain path of other MESFET's Q3 and Q4 whose gates are grounded in AC-wise.Current by-passing means 4, 4 are connected to the sources of other MESFET's Q3, Q4. DC bias currents of the differential pair of MESFET's Q1, Q2 are set to relatively large values to increase the mutual conductance gm of the differential pair of MESFET's Q1, Q2. Despite a large DC bias current, the current by-passing means 4, 4 decrease the DC voltage drops across the load resistances R.sub.L, R.sub.L, and enable the differntial amplifier to operate on a low power source voltage.

公开(公告)号：US5568184A

公开(公告)日：1996-10-22

申请号：US440710

申请日：1995-05-15

申请人： Koichi Shibata ,  Taizo Kinoshita

发明人： Koichi Shibata ,  Taizo Kinoshita

IPC分类号： H04N7/15 ,  H04N7/26 ,  H04N7/50 ,  H04N21/2365 ,  H04N21/434

CPC分类号： H04N21/4347 ,  H04N19/423 ,  H04N19/61 ,  H04N21/2365 ,  H04N7/15 ,  H04N7/152 ,  H04N19/30 ,  Y10S370/902

摘要： A display system for displaying a plurality of video windows on a display screen. A receiving element is included for receiving video data packets from a plurality of video sources in a time sharing manner, each of the video data packets including: coded video information for representing a partial image contained within one of a plurality of blocks constituting a video frame; attribute information for indicating at least a location of a block corresponding thereto within the video frame; and identification information of the video source. A decoder element is connected to the receiving element for decoding the coded video information extracted from each of the video data packets and for outputting a partial image corresponding to one of the blocks in the video frame. A set of frame memories are included for assembling partial images into video frames, each of the frame memories having a plurality of window areas located in a predetermined layout defined therein, and a set of the window areas each located at a same location within respective frame memories being associated with a same video source with respect to each other. A writing element is included for writing each partial image derived from the decoder element into one of the window areas within one of the frame memories which is specified in accordance with the identification information extracted from a video data packet related to the partial image and a utilization status of the window areas. Finally, an outputting element is included for selectively outputting contents of the frame memories on a display screen by changing over the frame memories depending upon a display position on the display screen thereby to present a plurality of video frames at a plurality of window areas on the display screen.

摘要翻译： 一种用于在显示屏幕上显示多个视频窗口的显示系统。 包括接收元件，用于以时分方式从多个视频源接收视频数据分组，每个视频数据分组包括：用于表示包含在构成视频帧的多个块之一内的部分图像的编码视频信息 ; 属性信息，用于指示视频帧内至少与其对应的块的位置; 和视频源的识别信息。 解码器元件连接到接收元件，用于对从每个视频数据包提取的编码视频信息进行解码，并输出与视频帧中的一个块对应的部分图像。 包括一组帧存储器，用于将部分图像组合成视频帧，每个帧存储器具有位于其中定义的预定布局中的多个窗口区域，以及一组各自位于相应帧内的相同位置处的窗口区域 存储器相对于彼此与相同的视频源相关联。 包括写入元件，用于将从解码器元件导出的每个部分图像写入根据与部分图像相关的视频数据包提取的识别信息指定的一个帧存储器中的一个窗口区域中，以及利用 窗口区域的状态。 最后，包括输出元件，用于通过根据显示屏幕上的显示位置改变帧存储器来在显示屏上选择性地输出帧存储器的内容，从而在多个窗口区域上呈现多个视频帧 显示屏。

公开(公告)号：US06334022B1

公开(公告)日：2001-12-25

申请号：US09030761

申请日：1998-02-26

申请人： Akihiko Ohba ,  Toru Matsushita ,  Masahiro Kageyama ,  Hiroshi Yoshigi ,  Taizo Kinoshita ,  Tatsundo Suzuki ,  Yukio Kumagai ,  Hisao Tanabe

发明人： Akihiko Ohba ,  Toru Matsushita ,  Masahiro Kageyama ,  Hiroshi Yoshigi ,  Taizo Kinoshita ,  Tatsundo Suzuki ,  Yukio Kumagai ,  Hisao Tanabe

IPC分类号： H04N591

CPC分类号： H04N21/4147 ,  G06F17/30828 ,  G06F17/30852 ,  G11B27/28 ,  G11B27/34 ,  G11B2220/20 ,  H04N5/76 ,  H04N5/85

摘要： The video information recording and reproducing apparatus includes an inputting information part for receiving video information, a storing information part, an outputting information part for producing video information, an automatic indexing information part for automatically adding indexes to the inputted video information, a filtering video information part for automatically selecting video information to be stored from the inputting information part, and a controlling part for controlling the above elements, thereby actualizing the free time-shift viewing function, intelligent search function, and automatic video data base generation function.

摘要翻译： 视频信息记录和再现装置包括用于接收视频信息的输入信息部分，存储信息部分，用于产生视频信息的输出信息部分，用于自动向所输入的视频信息添加索引的自动索引信息部分，过滤视频信息 从输入信息部分自动选择要存储的视频信息的部分，以及用于控制上述元素的控制部分，从而实现空闲时移观看功能，智能搜索功能和自动视频数据库生成功能。

公开(公告)号：US5617135A

公开(公告)日：1997-04-01

申请号：US299633

申请日：1994-09-02

申请人： Fumio Noda ,  Koichi Shibata ,  Taizo Kinoshita

发明人： Fumio Noda ,  Koichi Shibata ,  Taizo Kinoshita

IPC分类号： H04N7/15 ,  H04N7/14 ,  H04N7/52 ,  H04N7/60 ,  H04N7/10

CPC分类号： H04N7/147 ,  H04N19/61 ,  H04N19/80 ,  H04N19/82 ,  H04N21/236 ,  H04N21/434 ,  H04N7/52

摘要： A multi-point visual communication system which includes an adaptive filter part for controlling a spatial frequency characteristic of a video signal, a filter selector for selecting a video quality to be transmitted from its own site on the basis of integrated requests received from sites, and a filter control for adaptively controlling a filter characteristic taking both of a video information quantity and situations of a telecommunication network into consideration, and wherein a video signal processed by the adaptive filter part is subjected to an encoding operation and then transmitted to the telecommunication network. Thereby, the video quality can be selected according to users' requests, and the video quality of the multi-point visual communication can be improved without incurring an excessive increase of a video information quantity. Further, through the video signal processing taking both the video characteristic and the telecommunication network situations into consideration, a comparatively high quality of video transmission can be realized when viewed from an information quantity.

摘要翻译： 一种多点视觉通信系统，包括：用于控制视频信号的空间频率特性的自适应滤波器部分;滤波器选择器，用于根据从站点接收到的综合请求，从其自身站点中选择要发送的视频质量;以及 滤波器控制，用于考虑视频信息量和电信网络的情况自适应地控制滤波器特性，并且其中由自适应滤波器部分处理的视频信号进行编码操作，然后发送到电信网络。 因此，可以根据用户的请求选择视频质量，并且可以提高多点可视通信的视频质量，而不会导致视频信息量的过度增加。 此外，通过考虑视频特性和电信网络情况的视频信号处理，当从信息量观察时，可以实现较高质量的视频传输。

公开(公告)号：US5548346A

公开(公告)日：1996-08-20

申请号：US336646

申请日：1994-11-04

申请人： Itaru Mimura ,  Hirotada Ueda ,  Shigeo Sumino ,  Mitsuru Ikezawa ,  Toshiaki Suzuki ,  Taizo Kinoshita ,  Katsumi Tada

发明人： Itaru Mimura ,  Hirotada Ueda ,  Shigeo Sumino ,  Mitsuru Ikezawa ,  Toshiaki Suzuki ,  Taizo Kinoshita ,  Katsumi Tada

IPC分类号： H04N5/14 ,  H04N5/45 ,  H04N5/60 ,  H04N7/15 ,  H04N21/43

CPC分类号： H04N21/4305 ,  H04N5/147 ,  H04N5/607 ,  H04N7/15 ,  H04N5/45

摘要： A real time visual communication system capable of improving a correspondence between a received video signal and a received audio signal in real time and improving reality. An AV signal is separated into a video signal and an audio signal, and the output state of the video or audio signal is controlled by the characteristics of the audio or video signal. For example, the sound field, reverberation, and the like are controlled in accordance with the characteristics of the video signal. A suitable image pickup unit is selected in accordance with the characteristics of the audio signal to make the sights of conversation participants coincide with each other. It is possible to reproduce sounds of audio signals well matching video signals and to provide visual communication having good reality because of the combination of matched audio and video signals.

摘要翻译： 一种实时视觉通信系统，其能够实时地改善接收到的视频信号和接收到的音频信号之间的对应关系并改善现实。 AV信号被分成视频信号和音频信号，并且视频或音频信号的输出状态由音频或视频信号的特性来控制。 例如，根据视频信号的特性来控制声场，混响等。 根据音频信号的特性来选择合适的图像拾取单元，以使会话参与者的视线彼此一致。 可以再现与视频信号相匹配的音频信号的声音，并且由于匹配的音频和视频信号的组合而提供具有良好现实的视觉通信。

公开(公告)号：US5446491A

公开(公告)日：1995-08-29

申请号：US170750

申请日：1993-12-21

申请人： Koichi Shibata ,  Taizo Kinoshita

发明人： Koichi Shibata ,  Taizo Kinoshita

IPC分类号： H04N7/15 ,  H04N7/26 ,  H04N7/50 ,  H04N21/2365 ,  H04N21/434

CPC分类号： H04N21/4347 ,  H04N19/423 ,  H04N19/61 ,  H04N21/2365 ,  H04N7/15 ,  H04N7/152 ,  H04N19/30 ,  Y10S370/902

摘要： A multi-point video conference system includes a plurality of terminals and a network. Each terminal includes a coder to code and to packetize at least a motion picture in a block unit and a multi-point video decoder to sequentially receive and to decode packets sent from decoders at other points. The decoder includes a video processor to process video information in a time sharing manner, a channel selection controller to decide a transmission source of a received packet according to information of the packet and to notify the source to the video processor, a shared frame memory to store therein video information from the plural terminals, and a display frame memory to output therefrom the video information in a synchronous fashion.

摘要翻译： 多点视频会议系统包括多个终端和网络。 每个终端包括一个编码器，用于对块单元中的至少一个运动图像进行编码和打包，并且多点视频解码器依次接收和解码在其他点从解码器发送的分组。 解码器包括以时分方式处理视频信息的视频处理器，频道选择控制器，用于根据分组的信息来决定接收到的分组的传输源，并向源视频处理器通知共享帧存储器 存储来自多个终端的视频信息，以及显示帧存储器，以同步方式输出视频信息。

公开(公告)号：US5159452A

公开(公告)日：1992-10-27

申请号：US604638

申请日：1990-10-22

申请人： Taizo Kinoshita ,  Yoshizumi Eto

发明人： Taizo Kinoshita ,  Yoshizumi Eto

IPC分类号： H04N1/32 ,  H04B14/04 ,  H04L12/70 ,  H04L12/951 ,  H04N1/40 ,  H04N7/60 ,  H04N19/89

CPC分类号： H04N21/434 ,  H04N19/85 ,  H04N19/88 ,  H04N19/89 ,  H04N21/236

摘要： A video signal transmitting method comprising: a sending method including the steps of: dividing an analog video signal in a unit corresponding to integer times of a number of bits composing an information field of one packet in packet transmission and converting into a digital video signal, forming a digitalized video signal into a plurality of packets, forming a plurality of packets into a first packet block in M lines.times.N columns, adding an error correction code which corrects a longitudinal error of data in a first packet block as a second packet block in P lines.times.N columns in an (M+1)th line and thereafter, and sending a packet; and a receiving method including the steps of: recomposing the same packet block as that composed on a sending side from plurality of received packets, recovering a video signal with packet loss information from an exchange and an error correction code formed into a packet, and regenerating an analog video signal from a digital video signal after recovery.

摘要翻译： 一种视频信号发送方法，包括：发送方法，包括以下步骤：将分组发送中组成一个分组的信息字段的位数的整数倍的整数倍的模拟视频信号分割成数字视频信号， 将数字化视频信号形成多个分组，将多个分组形成为M行×N列中的第一分组块，添加纠错码，其将第一分组块中的数据的纵向误差校正为第二分组块，其中P （M + 1）行中的linesxN列，之后发送分组; 以及接收方法，包括以下步骤：从多个接收到的分组重构与在发送侧构成的分组块相同的分组块，从交换机恢复分组丢失信息的视频信号和形成分组的纠错码，并重新生成 来自恢复后的数字视频信号的模拟视频信号。