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公开(公告)号：JPH04132346A
公开(公告)日：1992-05-06
申请号：JP25310590
申请日：1990-09-21
Applicant: TOSHIBA CORP
Inventor： TANAKA SHUICHI , NAKAMURA MAKOTO , KODAMA TOMOKO
Abstract: PURPOSE:To attain accurate error correction by storing a signal pattern of a frame synchronizing signal sent from a sender side equipment changed by a phase rotation of a recovered carrier as a comparison pattern in advance and comparing the signal pattern of a demodulated frame synchronizing signal with the comparison pattern. CONSTITUTION:A frame synchronizing signal having preset signal patterns x2, x3, y2, y3 in response to signal point arrangement of the rotation symmetry arrangement differential conversion system is sent from a sender side radio equipment A and change patterns x2, x3, y2, y3 of a transmission frame synchronizing signal by the phase uncertainty of the recovered carrier are stored in a frame synchronizing circuit 72 of a radio equipment B of a receiver side as comparison patterns. Then the signal pattern of the demodulated frame synchronizing signal is compared with the comparison pattern to establish frame synchronization. Thus, an error correction circuit and demodulator 73 applies accurate error correction to the correct frame synchronization.
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公开(公告)号：JPH03135140A
公开(公告)日：1991-06-10
申请号：JP27180389
申请日：1989-10-20
Applicant: TOSHIBA CORP
Inventor： TANAKA SHUICHI , FUJII YASUYUKI
Abstract: PURPOSE:To improve the detection capability by generating a signal interruption detection signal when either of an output of a means discriminating the presence of a base band signal and an output of a means of AND processing of its inputs is consecutively missing for a prescribed time or over. CONSTITUTION:Suppose that all of binary digital signals S11 - S22 or a clock signal CLK is missing or all of the signals S11,S21 of S12,S22 is missing, then base band signal outputs IS,QS of D/A converters 12I,12Q are both missing or either of them is missing. Thus, a discrimination output of comparators 21I,21Q of a signal interrupt detection circuit 20 goes to an L level. Then an L level signal, i.e., an alarm signal is generated after laps of a prescribed time from the generation of input interruption from either or both of one-shot multivibrators 22I,22Q is generated and the alarm signal is outputted via an AND circuit 23. Thus, input interruption of the binary digital signals S11 - S22 is detected without missing of detection.
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公开(公告)号：JPH01200749A
公开(公告)日：1989-08-11
申请号：JP2391488
申请日：1988-02-05
Applicant: NIPPON TELEGRAPH & TELEPHONE , TOSHIBA CORP
Inventor： YOSHIKAWA TATSUO , OYA YASUNORI , TANAKA SHUICHI , OI TOSHIHIKO
Abstract: PURPOSE:To attain the detection of a stable synchronizing step-out and to execute a precise switching control by finding the mean voltage value of synchronous condition detecting information obtained at a carrier reproducing circuit and comparing it with a reference voltage. CONSTITUTION:A multilevel orthogonal amplitude modulation signal outputted from an intermediate frequency amplifier is branched with a distributor 12, and is introduced through synchronous wave detectors 11a and 11b, LPFs 13a and 13b, and operational amplifiers 14a and 14b to identifying devices 15a and 15b. Then, a fixed logic process is executed with a receiving logic circuit 17, and demodulation digital data D1-D4 are obtained. On the other hand, from a synchronous condition detecting signal BS of a logic circuit 18 for a carrier reproducing control, the mean voltage value DS of the signal BS is compared with a reference voltage by a synchronizing step-out detecting circuit 30, and a synchronizing step-out signal ES is obtained. By the signal ES, a receiving system switching circuit is controlled and is switched from an existing system to a standby system. Thus, a precise switching control is realized.
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公开(公告)号：JPH01173980A
公开(公告)日：1989-07-10
申请号：JP33050287
申请日：1987-12-26
Applicant: TOSHIBA CORP
Inventor： ENDO KENJIRO , TANAKA SHUICHI
Abstract: PURPOSE:To successively execute a picture searching at a high speed with a quick turning-over mode by controlling the title device at a high speed in an area different from the recording area of a sub-picture signal. CONSTITUTION:For a period 7a, the areas of a first sub-picture signal are reproduced one after another, and a tape speed in this period is the same as that at the time of an ordinary reproducing, and since a part 7b of second - fourth sub-picture signal areas is unnecessary to be projected, for the part 7b, a tape is traveled, for example, twice as fast as that in the ordinary reproducing and is skip-reproduced. For a period 7c, the first sub-picture signal is written to a memory 16, and for a period 7d, the next first sub-picture signal is written to a memory 17. Thereafter, the contents of the memory 16 are transferred to a frame memory 12 for a period 7e, the contents of the memory 16 are transferred to the frame memory 12 for a period 7f, the data transferred from the memory 16 are displayed for a period 7g, and the data transferred from the memory 17 are displayed for the period 7e. Thus, the picture searching can be obtained successively at a high speed with the quick turning-over mode.
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公开(公告)号：JPH01173979A
公开(公告)日：1989-07-10
申请号：JP33050187
申请日：1987-12-26
Applicant: TOSHIBA CORP
Inventor： ENDO KENJIRO , TANAKA SHUICHI
Abstract: PURPOSE:To successively obtain a picture searching at a high speed with a quick feeding mode by dividing a picture element signal equivalent to one picture into plural sub-picture signals sub-sampled in units of sub-pictures and successively arranging the plural sub-picture signals on a track. CONSTITUTION:Each unit block to compose a complete one picture 100 is made into one picture element, and a recording is executed so that all the picture elements are sub-sampled for 1/2 respectively in a length (vertical direction) and a width (horizontal direction), divided into four sub-pictures, and successively arranged between a guarding band tracks 201 and 201 by making the sub-picture into one unit. In the case of the quick feeding mode, for example, only the signal of the first sub-picture, which comes immediately after the guard band 201, is read and reproduced, and the signal recording parts of from a second sub-picture to a fourth sub-picture are skipped. Further, when the signal of the first sub-picture is lacking, the lacking part is detected using error detecting information and is supplied with the signal of the second sub-picture. Thus, the picture searching can be obtained successively at a high speed with the quick feeding mode, and further, a noise never occurs in a picture even when any lack exists in the information.
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Patent Agency Ranking
公开(公告)号：JPS6386608A
公开(公告)日：1988-04-18
申请号：JP22967186
申请日：1986-09-30
Applicant: TOSHIBA CORP
Inventor： HAYAKAWA HIROKO , TANAKA SHUICHI , OI TOSHIHIKO
Abstract: PURPOSE:To approximate the characteristic of a roll-off filter to the theoretical characteristic by providing, in a reception filter also, a circuit to correct amplitudes in the necessary frequency domain within a pass band according to a peak-shaped curve of frequency. CONSTITUTION:The reception filter comprises the following elements in series connection between is its input terminal 9 and output terminal 17: an nth-order LPF (low-pass filter) 10 having plural attenuation poles outside the pass band, a valley-shaped amplitude correction circuit 11 to correct the amplitudes in accordance with a valley-shaped frequency characteristic both in and outside the pass band, a peak-shaped amplitude correction circuit 12 to correct the amplitudes in accordance with a peak-shaped frequency characteristic within a necessary frequency domain in the pass band, valley- shaped amplitude correction circuits 13, 14 whose performance is similar to that of the circuit 11, and phase compensation circuits 15, 16 to correct the phase characteristic in the pass band in this order. Since the amplitude correction circuits that correct the amplitudes in the necessary frequency domain in the pass band in accordance with the peak-shaped frequency characteristic in the reception filter, the part of primary inclination from the DC domain of the curve that conventionally is existing is lifted, and the curve can be approximated to the theoretical characteristic.
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公开(公告)号：JPS631220A
公开(公告)日：1988-01-06
申请号：JP14412986
申请日：1986-06-20
Applicant: TOSHIBA CORP
Inventor： TANAKA SHUICHI , OI TOSHIHIKO , HAYAKAWA HIROKO
Abstract: PURPOSE:To ensure application of a roll-off filter even with communication systems of medium and large capacities by setting the characteristics to both a transmission device and a reception device so that the synthetic characteristics of both devices are equal to the desired roll-off characteristics and adding the transmission and reception filters consisting of passive elements. CONSTITUTION:A transmission filter 10 is formed by connecting successively and in series a 5th LPF circuit 11 having two attenuating poles set outside a pass band, an amplitude correction circuit 12 which corrects the amplitude within the pass band according to the valley-shaped frequency characteristics, an amplitude correction circuit 13 which corrects the amplitude outside the pass band according to the chevroned frequency characteristics, an amplitude correction circuit 14 which corrects the amplitude outside the pass band according to the valley-shaped characteristics, and the phase compensating circuits 15 and 16 which compensate the phase characteristics within the pass band. While a reception filter 20 is formed by connecting successively and in series a 5th LPF circuit 21 having two attenuation poles outside the pass band, the amplitude correction circuits 22, 23 and 24 which correct the amplitudes inside and outside the pass band according to the valley-shaped frequency characteristics, and phase compensating circuits 25 and 26. Then coils, capacitors and resistances are combined for both filters 10 and 20.
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公开(公告)号：JPS61156590A
公开(公告)日：1986-07-16
申请号：JP27830784
申请日：1984-12-27
Applicant: TOSHIBA CORP , TOSHIBA AUDIO VIDEO ENG
Inventor： TANAKA SHUICHI , KANESHIGE TOSHIHIKO
IPC: G11B27/10
Abstract: PURPOSE:To improve the detecting capacity by deciding definitely a present position address by comparing a reproduced block address with a block address which has been made from rotational angle information of a rotary head, comparing it with a separate code of a desired position address, and varying a search speed. CONSTITUTION:A block address signal from a demodulating part 22 is compared with a block address signal which has been generated in accordance with a rotational angle of a rotary head 31, by a comparator 255, and when they coincide with each other, a memory 256 designates a write address and stored a separate bit. Subsequently, it is inputted to one terminal of a comparing part 243, a desired position address is inputted to the other, and by a selecting signal of a comparing bit shift part 248, one bit each is compared in order from the uppermost rank, a coincidence or dissidence detecting pulse is outputted, and a search speed setting part 249 generates a speed setting signal in accordance with the contents of a selecting signal of the comparing bit shift part 248. On the other hand, by a search start signal SER, a large or small deciding part 244 compares the values of both the input address data, and outputs a signal for showing a tape feed direction, to an output terminal 245.
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公开(公告)号：JPS6161551A
公开(公告)日：1986-03-29
申请号：JP18294084
申请日：1984-08-31
Applicant: Toshiba Corp
Inventor： TANAKA SHUICHI , OI TOSHIHIKO
IPC: H04L27/227
CPC classification number: H04L27/227
Abstract: PURPOSE:To evade false pull-in phenomenon with simple circuit constitution by detecting the false pull-in phenomenon from mutual relations between a cord error ratio and an incoming electric field level. CONSTITUTION:A signal related to a cord error ratio inputted to a terminal 21 is converted into a voltage signal by a converting circuit 23 and inputted to a deciding circuit 24. The circuit 24 inputs a logic '1' to an AND circuit 25 when the voltage from circuit 23 exceeds the specified value. The circuit 25 obtains 'AND' between a signal of the logic '1' when an incoming electric field level from a terminal 22 is normal and an deciding output from the circuit 24, then the occurrence of false pull-in phenomenon is detected. The detected signal is inputted to a switch SW drive circuit 26, an SW30 in a sweep waveform generation circuit 29 turns ON, and a sweeping waveform signal is generated from the circuit 29, and outputted to a terminal 33 through a SW31 in an OFF state to release the false pull-in phenomenon. ON the other hand, the output of the circuit 25 is delayed 27 and inputted to a SW drive circuit 28, a sweep waveform signal from a circuit 29 is voltage-divided 32 after turning ON of the SW31, and the output of the circuit 29 is outputted at a small level to be contented in the range of the synchronous pull-in.
Abstract translation: 目的：通过简单的电路结构，通过从线缆误差比和输入电场电平之间的相互关系中检测出假引入现象来避免假引入现象。 构成：与输入到端子21的绳索误差比相关的信号由转换电路23转换成电压信号，并输入到判定电路24.电路24在AND电路25中输入逻辑“1”到AND电路25 来自电路23的电压超过规定值。 电路25当来自终端22的输入电场电平正常并且电路24的决定输出时，在逻辑“1”的信号之间获得“与”，从而检测到错误引入现象的发生。 检测到的信号被输入到开关SW驱动电路26，扫描波形发生电路29中的SW30变为ON，从电路29产生扫描波形信号，并通过SW31在OFF状态下输出到端子33 释放假引入现象。 另一方面，电路25的输出被延迟27并输入到SW驱动电路28，来自电路29的扫描波形信号在SW31导通之后被分压32，并且电路29的输出 以小的水平输出，以满足同步拉入的范围。
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40.发明专利
公开(公告)号：JP2007082093A
公开(公告)日：2007-03-29
申请号：JP2005270218
申请日：2005-09-16
Applicant: Toshiba Corp , 株式会社東芝
Inventor： YAMADA YOSHIO , TANAKA SHUICHI
Abstract: PROBLEM TO BE SOLVED: To provide a satellite line control system whose amount of intermittent channel discontinuity time due to a rainfall or the like can be shortened and the operational cost can be reduced by enabling rapid and appropriate changes of a modulation system at a transmission end and demodulation system at a receiving end without requiring manpower. SOLUTION: In a transmitting station TS, after having sent out broadcast signals to a broadcast transmitting channel, the broadcast signals reflex from a satellite SAT are received to judge by a system controller 17 whether its C/N exceeds a threshold value or not. Where the C/N has exceeded the threshold value, a modulation system of a modulation circuit 15 is varied automatically to QPSK that is a low C/N and receivable and at the same time it is notified to a receiving station RS via a message transmitting channel different from the broadcast transmitting channel that the modulation system has been varied. Then, in the receiving station RS, a demodulation system of a demodulation circuit 23 is varied automatically in tune with the QPSK in a system controller 26. COPYRIGHT: (C)2007,JPO&INPIT
Abstract translation: 要解决的问题：提供一种卫星线路控制系统，其能够缩短由于降雨等导致的间歇通道不连续时间量，并且可以通过使调制系统能够快速适当地改变来减少运行成本 无需人力的接收端的发送端和解调系统。 解决方案：在发送站TS中，在向广播发送信道发送广播信号之后，接收到来自卫星SAT的广播信号反射，以由系统控制器17判断其C / N是否超过阈值，或者 不。 在C / N超过阈值的情况下，调制电路15的调制方式自动变化为低C / N并可接收的QPSK，并且同时经由消息发送被通知给接收站RS 与调制系统已经变化的广播发送信道不同的信道。 然后，在接收站RS中，解调电路23的解调系统根据系统控制器26中的QPSK自动改变。（C）2007，JPO＆INPIT
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