公开(公告)号：US4455570A

公开(公告)日：1984-06-19

申请号：US311082

申请日：1981-10-13

申请人： Yoshifumi Saeki ,  Kenji Yashiro

发明人： Yoshifumi Saeki ,  Kenji Yashiro

IPC分类号： H04H20/79 ,  H04N7/173 ,  H04N7/10

CPC分类号： H04H20/79 ,  H04N7/173 ,  H04N2007/17372

摘要： In a cable television system wherein a polling channel is provided for two-way communications between the center and the terminal units, video data signals are transmitted on request from the center to the terminal units during an otherwise idle period in said polling channel.

摘要翻译： 在其中为中心和终端单元之间的双向通信提供轮询信道的有线电视系统中，视频数据信号在所述轮询信道中的空闲时段期间从中心发送到终端单元。

公开(公告)号：US4045732A

公开(公告)日：1977-08-30

申请号：US655157

申请日：1976-02-04

申请人： Kenji Yashiro ,  Yoshifumi Saeki

发明人： Kenji Yashiro ,  Yoshifumi Saeki

IPC分类号： H02M7/155 ,  G01R29/04 ,  H02H3/00 ,  H02M7/06 ,  G01R19/16

CPC分类号： G01R29/04

摘要： The operative status of an electrical apparatus unit such as a television receiver, incorporating an AC-DC converter, and drawing a substantial amount of current is sensed while differentiating from the usage of a lower amount of current, as when operating in a standby mode. The sensor distinguishes between the standby current waveform and a distinctly different current waveform generated when the AC-DC converter draws current in the mode in which full power is on. The sensor incorporates a reference current detector responsive to the mean of the absolute value of alternating current flowing through a power line to the electrical unit, and a peak value current detector responsive to the peak value of the periodic signal on the power line. A comparator circuit receives outputs from both detectors, and provides an output signal when the ratio therebetween is in excess of a predetermined value, this condition only applying when the AC-DC converter is operative. The comparator may comprise a differential amplifier which periodically triggers a pulse generator to maintain a selected signal level and activate a relay as long as the selected proportionality exists between the peak and mean values of the AC power signal.

公开(公告)号：US4794643A

公开(公告)日：1988-12-27

申请号：US509509

申请日：1983-06-30

申请人： Yoshifumi Saeki ,  Shigeru Watanabe ,  Ryuichi Todoroki

发明人： Yoshifumi Saeki ,  Shigeru Watanabe ,  Ryuichi Todoroki

IPC分类号： H04N7/16 ,  H04N7/167 ,  H04N7/171

CPC分类号： H04N7/162 ,  H04N7/1675 ,  H04N7/1713

摘要： A scrambling method for TV pictures avoids deterioration of the reproduced picture by level compressing only selected horizontal flyback portions according to a randomly selected pattern to prevent synchronization at the receiver. Key signals are added repetitively to a plurality of horizontal synch signals in one frame so as to enable descrambling of the picture at the decoder, even if noise or data error interferes with one or more of the signals.

摘要翻译： 电视图像的加扰方法通过根据随机选择的模式仅对所选择的水平反激部分进行电平压缩来避免再现图像的劣化，以防止在接收机处的同步。 即使噪声或数据误差干扰一个或多个信号，也可以在一帧中重复地将重要信号加到多个水平同步信号中，以便能够在解码器处对图像进行解扰。

公开(公告)号：US4245245A

公开(公告)日：1981-01-13

申请号：US654721

申请日：1976-02-02

申请人： Katsuaki Matsumoto ,  Yoshifumi Saeki ,  Osamu Tazawa ,  Minoru Kosaka ,  Masaki Saito ,  Hiroki Uemura ,  Tetuo Kanazashi ,  Seiji Hashimoto ,  Tsuyoshi Fujiwara ,  Tsutomu Fukui ,  Saburo Takaoka ,  Tsutomu Suzuki ,  Shozo Nakamuta ,  Toshihiko Hosaka ,  Kuniaki Shiratori ,  Youichiro Tsuda ,  Takashi Morii ,  Sumitaka Matsumura ,  Morihisa Oka

发明人： Katsuaki Matsumoto ,  Yoshifumi Saeki ,  Osamu Tazawa ,  Minoru Kosaka ,  Masaki Saito ,  Hiroki Uemura ,  Tetuo Kanazashi ,  Seiji Hashimoto ,  Tsuyoshi Fujiwara ,  Tsutomu Fukui ,  Saburo Takaoka ,  Tsutomu Suzuki ,  Shozo Nakamuta ,  Toshihiko Hosaka ,  Kuniaki Shiratori ,  Youichiro Tsuda ,  Takashi Morii ,  Sumitaka Matsumura ,  Morihisa Oka

IPC分类号： H04N7/167 ,  H04N7/171 ,  H04N7/173 ,  H04N7/16 ,  H04N7/00

CPC分类号： H04N7/17309 ,  H04N7/17363 ,  H04N2007/17372

摘要： A two-way CATV system having a substantial number of terminals incorporates a central processor and transmitter system which continually interrogates the terminals at high speed, monitoring changes of usage of premium programs and other data while also permitting central control of access to restricted premium programs. For inexpensive but reliable intercommunication, short, fixed word length digital messages are frequency multiplexed onto the cable in both upstream and downstream directions, and subscriber groups are controllably selected in turn, with each subscriber being scanned in what may be an arbitrary order by transmission of unique private messages which are recognized at the terminal and in response to which previously prepared fixed length messages are immediately transmitted in return. By employing both upstream and downstream messages which are initiated by a series of synchronizing bits and non-ambiguously related subsequent data sequences, and by the provision of means to initiate both downstream and upstream messages of short length without delay, rapid but reliable data interchange is effected despite differences in transmission and response times with different subscribers. Concurrently, terminal status and various special conditions including security alarms are remotely processed at each terminal, and short upstream messages are assembled containing priority selected data to be transmitted in response to an interrogation. The system incorporates additional means for monitoring power status, program selection and authorization and other operating conditions at each terminal effectively to provide accurate and reliable accounting information while preventing unauthorized or improper usage of restricted premium programs.

摘要翻译： 具有大量终端的双向CATV系统包括中央处理器和发射机系统，其以高速度连续询问终端，监视高级节目和其他数据的使用的改变，同时还允许对受限优惠节目的访问的中央控制。 对于廉价但可靠的互通，短，固定字长数字消息在上行和下行两个方向上被频率复用到电缆上，并且用户组可以依次可控地选择，每个用户以任意顺序扫描可以通过传输 在终端被识别并且响应于先前准备好的固定长度的消息被立即发送的唯一私人消息。 通过采用由一系列同步位和非相关相关的后续数据序列发起的上行和下行消息，并且通过提供无延迟地启动短长度的下行和上行消息的装置，快速但可靠的数据交换是 尽管与不同用户的传输和响应时间有差异。 同时，终端状态和包括安全警报在内的各种特殊条件在每个终端进行远程处理，并且组合短的上游消息，其中包含响应于询问要发送的优先选择数据。 该系统包括用于监控每个终端的电源状态，程序选择和授权以及其他操作条件的其他手段，有效地提供准确可靠的会计信息，同时防止未经授权或不正确使用限制性溢价程序。

公开(公告)号：US4962529A

公开(公告)日：1990-10-09

申请号：US870297

申请日：1986-05-23

申请人： Yoshifumi Saeki ,  Shigeru Watanabe

发明人： Yoshifumi Saeki ,  Shigeru Watanabe

IPC分类号： H04N7/16 ,  H04N7/167 ,  H04N7/171

CPC分类号： H04N7/16 ,  H04N7/162 ,  H04N7/1675 ,  H04N7/1713

摘要： A scrambling method for TV pictures avoids picture deterioration by level compressing only selected horizontal flyback portions of the video signal to effect scrambling. A key signal is superposed on selected horizontal synch signals and, when removed at the decoder, enables level expansion of those horizontal flyback portions compressed in order to allow the TV receiver to effect synchronization. Data signals for enabling or disabling reception of particular programming such as paid programs may be superimposed on other selected horizontal synch signals.

摘要翻译： 电视图像的加扰方法通过仅对视频信号的所选水平回扫部分进行电平压缩来避免图像劣化，以实现加扰。 钥匙信号叠加在所选择的水平同步信号上，并且当在解码器处被移除时，使能压缩的水平回扫部分的电平扩展以允许TV接收机进行同步。 用于启用或禁用诸如付费节目的特定节目的接收的数据信号可以叠加在其他选择的水平同步信号上。

公开(公告)号：US4064536A

公开(公告)日：1977-12-20

申请号：US654880

申请日：1976-02-03

申请人： Yoshifumi Saeki ,  Hiroki Uemura

发明人： Yoshifumi Saeki ,  Hiroki Uemura

IPC分类号： H04K1/00 ,  H04N7/167 ,  H04N7/171 ,  H04N1/44

CPC分类号： H04N7/1713

摘要： Video signals for television are effectively scrambled and may later be descrambled without the presence of annoying visual disturbances by the introduction of a superposed distorted sine wave in synchronism with the horizontal synchronizing signal, in a "gray sync" mode of operation. Thereafter, the received signal may be normalized and descrambled by compensatory and synchronous modulation. Advantageously, the sinusoidal variation may be imposed both upon aural and visual components of the signal, and the aural AM signal may be utilized as a reference in descrambling the visual component.

摘要翻译： 电视的视频信号被有效地加扰，并且随后可以通过在“灰阶同步”操作模式中与水平同步信号同步地引入叠加的失真正弦波，而不会出现烦扰的视觉干扰而被解扰。 此后，接收信号可以通过补偿和同步调制被归一化和解扰。 有利地，可以在信号的听觉和视觉分量上施加正弦变化，并且可以将听觉AM信号用作解扰视觉分量的参考。

公开(公告)号：US4591951A

公开(公告)日：1986-05-27

申请号：US633889

申请日：1984-07-24

申请人： Shigeyoshi Iwamoto ,  Yoshifumi Saeki ,  Takashi Kuribayashi ,  Shinichiro Ishitsuka ,  Nobukuni Ogino

发明人： Shigeyoshi Iwamoto ,  Yoshifumi Saeki ,  Takashi Kuribayashi ,  Shinichiro Ishitsuka ,  Nobukuni Ogino

IPC分类号： H01G9/00 ,  H01G9/012 ,  H05K3/34 ,  H05K1/18

CPC分类号： H01G9/012 ,  H05K3/3426 ,  H05K2201/10606 ,  H05K2201/2036 ,  H05K2203/168 ,  Y02P70/613

摘要： An electronic component contained in a metal case is attached with an insulation mold at a sealing part and lead wires of the electronic component element are passing through holes on the insulator base, and the end parts of the lead wires are bent in recesses on the insulator base, thereby constituting surface mounting type electronic component.

摘要翻译： 包含在金属外壳中的电子部件在密封部分附有绝缘模具，并且电子元件的导线穿过绝缘体基座上的孔，并且引线的端部在绝缘体上的凹部中弯曲 从而构成表面安装型电子部件。

公开(公告)号：US4322745A

公开(公告)日：1982-03-30

申请号：US132444

申请日：1980-03-21

申请人： Yoshifumi Saeki ,  Kazuyoshi Onda

发明人： Yoshifumi Saeki ,  Kazuyoshi Onda

IPC分类号： H04N7/16 ,  H04N7/167 ,  H04N7/171

CPC分类号： H04N7/162

摘要： A television signal scrambling and descrambling method and apparatus for use with a community antenna television system in which the scrambling mode employed is changed from time to time so that one cannot illegally receive the transmitted signals over a long period of time if only one of the scrambling techniques employed is decoded. In the central facility, a plurality of scrambling circuits are provided, one for each scrambling mode desired. A selected one of the scrambling circuits is selected by a switch device which is controlled so as to switch among the scrambling circuits as desired. An identifying signal is transmitted which indicates which of the scrambling circuits is active. In the terminal units at each subscriber's home there is provided a corresponding set of descrambling circuits. The received signal is coupled to the inputs of the descrambling circuits and the appropriate one of the descrambling circuits selected in accordance with the demodulated identifying signal.

摘要翻译： 一种与社区天线电视系统一起使用的电视信号加扰和解扰方法和装置，其中采用的加扰模式不时地改变，使得如果只有一个加扰的那个，则不能非法地接收发送的信号 所采用的技术被解码。 在中央设施中，提供多个加扰电路，每个加扰电路一个为所需的加扰模式。 所选择的一个加扰电路由开关装置选择，开关装置被控制以便根据需要在加扰电路之间切换。 发送识别信号，其指示哪个加扰电路是活动的。 在每个用户家庭的终端单元中，提供了一组对应的解扰电路。 所接收的信号被耦合到解扰电路的输入端和根据解调的识别信号选择的适当的一个解扰电路。

公开(公告)号：US4145716A

公开(公告)日：1979-03-20

申请号：US790146

申请日：1977-04-22

申请人： Hiroki Uemura ,  Yoshifumi Saeki

发明人： Hiroki Uemura ,  Yoshifumi Saeki

IPC分类号： H04K1/00 ,  H04N7/167 ,  H04N7/171 ,  H04N7/16

CPC分类号： H04N7/1713

摘要： A descrambler system for a CATV television signal having IF audio, video and synchronizing components that is scrambled by a first amplitude modulation of the IF audio component and a second amplitude modulation of the combined audio, visual and synchronizing components by a key signal having a frequency that is an integral multiple of a 15.75 KHz horizontal synchronizing frequency includes a demodulator responsive to the scrambled signal, a key signal detecting circuit coupled to derive the key signal from the audio portion of the demodulator output and a dynamic limiter circuit coupled to remove noise from the key signal and provide a noise free sine wave key signal to the demodulator. The dynamic limiter circuit is an inexpensive circuit providing the signal processing characteristics of a much more expensive narrow band filter. It includes a current limiter circuit driven by a current source in proportion to the magnitude of the scrambled signal to provide a square wave signal at the key signal frequency that is proportional in magnitude to the scrambled signal and a simple filter that converts the square wave signal to a sine wave key signal that is used by the demodulator circuit with the exact shape, frequency and amplitude characteristics for noise free unscrambling of the scrambled CATV signal.

摘要翻译： 一种用于CATV电视信号的解扰器系统，其具有由IF音频分量的第一幅度调制加扰的IF音频，视频和同步分量，以及具有频率的键信号的组合的音频，视觉和同步分量的第二幅度调制 其是15.75KHz水平同步频率的整数倍，包括响应于加扰信号的解调器，耦合到从解调器输出的音频部分导出密钥信号的键信号检测电路和耦合以去除噪声的动态限幅器电路 关键信号，并向解调器提供无噪声的正弦波键信号。 动态限幅器电路是廉价的电路，其提供了更昂贵的窄带滤波器的信号处理特性。 它包括由电流源驱动的电流限制器电路，与加扰信号的幅度成比例，以提供与加扰信号大小成比例的键信号频率的方波信号，以及将矩形波信号 与解调器电路使用的具有准确形状，频率和幅度特性的正弦波键信号，用于无噪声解扰加扰的CATV信号。