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11. 发明专利

JPS60213185A Aspect ratio converter 失效
标题翻译：纵横比转换器
公开(公告)号：JPS60213185A
公开(公告)日：1985-10-25
申请号：JP6764284
申请日：1984-04-06
申请人： Hitachi Ltd
发明人： HIRANO YASUHIRO , YOSHIKI HIROSHI , SHIGESA HIDEHIKO
IPC分类号： H04N7/00 , H04N7/015
摘要： PURPOSE: To transmit a signal having an aspect ratio different from that of a current television system in the band of the current system by inserting a signal component having frequency higher than that of a television signal having an aspect ratio different from that of the current system into the gap of these spectrum.
CONSTITUTION: A luminance signal Y is separated into three frequency bands YL, YH
1 , YH
2 through high pass filters 2, 3 and a low pass filter 1. The band YH
1 is modulated at its amplitude by a carrier f
1 through a modulator 4 and its lower bnad wave is extracted by a low pass filter 8 to shift the frequency. The signal Y is shifted to the position of the current system spectrum by inverting the phase of the carrier by a phase inversion circuit 7 in each line period and each field period. On the other hand, the YH
2 is changed at its spectrum position by a modulator 5, a low pass filter 9 and a phase inversion circuit 7. Hue signals I, Q are limited at their bands by low pass filters 10, 11 and then rectangularly modulated by modulators 12, 13 and these modulated signals are added by an adder 15 to obtain a band signal based upon the current system.
COPYRIGHT: (C)1985,JPO&Japio
摘要翻译：目的：通过插入具有比当前系统的宽高比不同的电视信号的频率高的信号分量，在当前系统的频带内传输具有与当前电视系统的宽高比不同的信号进入这些光谱的差距。构成：亮度信号Y通过高通滤波器2,3和低通滤波器1分成三个频带YL，YH1，YH2。频带YH1通过调制器4以其载波f1被调制在其幅度上，其低频 bnad波由低通滤波器8提取以移位频率。信号Y通过在每个行周期和每个场周期中由相位反转电路7反相载波的相位而移位到当前系统频谱的位置。另一方面，YH2在其频谱位置被调制器5，低通滤波器9和相位反转电路7改变。色调信号I，Q在它们的频带被低通滤波器10,11限制，然后是矩形由调制器12,13调制，并且这些调制信号由加法器15相加以获得基于当前系统的频带信号。

12. 发明专利

JPH08139723A RADIO LAN SYSTEM AND BASE STATION DEVICE THEREFOR 失效
公开(公告)号：JPH08139723A
公开(公告)日：1996-05-31
申请号：JP27788094
申请日：1994-11-11
申请人： HITACHI LTD , HITACHI MICROCOMPUTER SYST
发明人： NAKAMURA KAZUNORI , SHIGESA HIDEHIKO , ANZAI ATSUSHI
IPC分类号： H04L12/28
摘要： PURPOSE: To transmit and receive various types of data even in an environment where the radio LANs are duplicated by transmitting a specific frame among plural base stations which are connected to the same organic LAN to decide the only master base station. CONSTITUTION: When the base stations 20a to 20c are started, a specific frame including its own address is transmitted in a prescribed cycle to the wire LAN 22a and 22b respectively via a repeater 23. When a specific frame including the address information of priority higher than its own station or a frame showing the existence of an MB(master base) station is received, it is decided that another MB station exists. When the absence of another MB station is decided, the base station of its own is decided as an MB station and the frame showing the existence of an MB station is sent to the wire LAN side in a prescribed cycle. Then the different hopping start frequencies are allocated to other base stations from the MB station to make these base stations hop in synchronism with each other. As a result, the mutual interference can be avoided among the radio LANs even in an environment where these radio LANS are duplicated.

13. 发明专利

JPH07203390A HIGH DEFINITION TELEVISION RECEIVER 失效
公开(公告)号：JPH07203390A
公开(公告)日：1995-08-04
申请号：JP463595
申请日：1995-01-17
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , YOSHIKI HIROSHI , SHIGESA HIDEHIKO
IPC分类号： H04N7/015
摘要： PURPOSE:To obtain images prevented from the deterioration of image quality in both of still and dynamic images by regenerating a highly accurate signal from a still image and suppressing the reproducing of a dynamic image. CONSTITUTION:A chrominance signal extracting circuit 6 extracts a chrominance signal (c), a high definition signal extracting circuit 7 extracts a high definition signal YH and a separator circuit 9 removes these signal components to extract a luminance signal YL. On the other hand, a motion detecting circuit 8 judges whether an image is a dynamic image or a still image, and in the case of a dynamic image, controls the output of the circuit 7. The signal (c) is demodulated to color difference signals I, Q by a demodulation circuit 10. The signal YH is demodulated to the original high frequency luminance signal by a frequency shifting circuit 11 and added to the YL component by an adder circuit 12 to demodulate the luminance signal. The circuit 6 can extract the chrominance signal component also by inter-frame operation in a still image mode or intra-field operation in a dynamic image mode.

14. 发明专利

JPH07170227A RADIO DATA COMMUNICATION SYSTEM 失效
公开(公告)号：JPH07170227A
公开(公告)日：1995-07-04
申请号：JP31626293
申请日：1993-12-16
申请人： HITACHI LTD
发明人： ISHII GENICHI , AMADA EIICHI , SHIGESA HIDEHIKO , TAKIYASU YOSHIHIRO
IPC分类号： H04B7/06 , H04B7/26
摘要： PURPOSE:To provide a radio data communication system which can secure the best state of communication with a mobile terminal and can validly prolong communicatable time. CONSTITUTION:A base station equipment 10 is provided with a phased array antenna 20 and a controller for the same, mobile terminals 40 are provided with fully directional antennas 50, the move of each mobile terminal 40 is detected at the base station equipment 10, and the beam direction of the antenna 20 is controlled while following the position movement. Thus, the power of the mobile station caused by antenna gain can be saved, multipath interference caused by the direction selectivity of the antenna can be reduced, and communication disable time related to antenna switch processing can be shortened.

15. 发明专利

JPH07143566A RADIO NETWORK SYSTEM 失效
公开(公告)号：JPH07143566A
公开(公告)日：1995-06-02
申请号：JP28786393
申请日：1993-11-17
申请人： HITACHI LTD
发明人： ADACHI SHUICHI , SHIGESA HIDEHIKO , AMADA EIICHI , TAKIYASU YOSHIHIRO , ISHIDO TOMOAKI , ISHII GENICHI
IPC分类号： H04B7/26 , H04Q7/38 , H04Q7/34
摘要： PURPOSE:To more exactly recognize a communication state by installing a transmission state display part at a terminal equipment in addition to a reception state display part. CONSTITUTION:Terminal equipments 100a and 100b are respectively provided with reception state display parts 170a and 170b, transmission state display parts 210a and 210b, external transmission power level setting parts 240a and 240b, and switches 250a and 250b. The siwtches 250a and 250b are changeover switches for setting whether transmission power is automatically controlled or manually controlled. Thus, the terminal equipments 100a and 100b display the reception states on the reception state display parts 170a and 170b and additionally transmit information for measuring the transmission states to a base station 300, the base station 300 receives this information from the terminal equipments 100a and 100b and transmits the received result to the terminal equipments 100a and 100b, and the terminal equipments 100a and 100b display the transmission states of the present terminal equipments based on that received result. Thus, the communication states of the terminal equipments 100a and 100b can be grasped at real time.

16. 发明专利

JPH0388450A COMMUNICATION EQUIPMENT 失效
公开(公告)号：JPH0388450A
公开(公告)日：1991-04-12
申请号：JP15523190
申请日：1990-06-15
申请人： HITACHI LTD , HITACHI MICROCUMPUTER ENG
发明人： TAKIYASU YOSHIHIRO , AMADA EIICHI , NAKAMURA KAZUNORI , TAKADA OSAMU , YAMAGA MITSUHIRO , SHIGESA HIDEHIKO , KOBAYASHI NAOYA , HIRAYAMA SATORU , IIYAMA TATSUTOU
IPC分类号： H04L13/08 , H04L12/813 , H04L12/815 , H04L12/863 , H04L12/951
摘要： PURPOSE:To attain reassembling of a message without causing abort of a reception cell due to a deficient memory area by utilizing the end of a data readout for a succeeding write cycle every time the data readout of one memory block is finished. CONSTITUTION:A main trunk LAN is constituted by a transmission line 100 and plural nodes (communication equipments) 200A-200F connecting in a ring with the transmission line 100. In the readout of a cell data as to one message, a cell data is read out based on an address read from a readout address queue in the first cycle and a cell data is read based on a succeeding address pointer read in the preceding cycle from a buffer memory for succeeding cycles, and an address representing a memory block from which the cell data is read is released for write operation of the cell data received succeedingly as an idle address. Thus, the message is reassembled without causing abort of the reception cell.

17. 发明专利

JPH02151191A COLOR SIGNAL REPRODUCING SYSTEM FOR TELEVISION RECEIVER 失效
公开(公告)号：JPH02151191A
公开(公告)日：1990-06-11
申请号：JP30411288
申请日：1988-12-02
申请人： HITACHI LTD
发明人： YOSHIKI HIROSHI , SHIGESA HIDEHIKO
IPC分类号： H04N9/64
摘要： PURPOSE:To improve the picture quality of a high chromaticity picture by weighting a signal processing to a color flat part and a color step part through the use of a signal representing a timewise change rate of a low frequency part of a chrominance signal or a signal representing a timewise change rate of a low frequency part of a luminance signal and controlling the weighting adaptively. CONSTITUTION:A luminance signal Y' is given to a low pass filter(LPF) 1 to obtain a component YL' below 1.5MHz in the signal processing to the color flat part. The component YL' and the luminance signal Y' are given to an adder 2 to obtain the relation of high frequency component of luminance signal (>=1.5MHz) YH'. Then the luminance signal low frequency component YL' of the color step part is given to a differentiating circuit 6, from which a timewise change is obtained. Then the luminance signal high frequency component YH' is given to a divider 7, and the result and the timewise change of an I' signal outputted from the differentiating device 5 are inputted to a multiplier 8. Then a deciding device 10 is used and the signal processing of the color flat part is implemented when the change dI'/dt of the low frequency component I' of the I signal is smaller and the signal processing of the color step part is implemented when the change dI'/dt of the low frequency component I' of the I signal is larger.

18. 发明专利

JPS63100883A FREQUENCY SHIFT CIRCUIT FOR PICTURE SIGNAL 失效
公开(公告)号：JPS63100883A
公开(公告)日：1988-05-02
申请号：JP24524586
申请日：1986-10-17
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , YOSHIKI HIROSHI , SHIGESA HIDEHIKO
IPC分类号： H04N7/015 , H04N7/00
摘要： PURPOSE:To reduce the disturbance to the existing television set by forming a pseudo carrier mu0' having a frequency of 1/n with a specific phase relation with a subcarrier mu0 and using the carrier mu0' as subcarrier information for the transmission. CONSTITUTION:The pseudo subcarrier mu0' being a frequency of mu0/n is generated from a subcarrier mu02.2fsc used for the frequency shift by a frequency 1/n circuit 8, the information of the pseudo subcarrier mu0' is added to form a high definition television signal. In order to add the frequency mu0', the mu0' information has only to be added to a picture signal of the last scanning line of e.g., an odd number field. Moreover, a specific phase relation is set to the subcarrier mu0 and the sent pseudo subcarrier mu0'. A subcarrier recovery circuit 16 generates a reference subcarrier mu0'' whose phase is coincident with the added pseudo subcarrier mu0'. The subcarrier mu0 is recovered from the carrier mu0'' by a frequency n-multiplier circuit 17.

19. 发明专利

JPS6346090A TELEVISION RECEIVER 失效
公开(公告)号：JPS6346090A
公开(公告)日：1988-02-26
申请号：JP18845086
申请日：1986-08-13
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , YOSHIKI HIROSHI , SHIGESA HIDEHIKO , FUKINUKI NORIHIKO
IPC分类号： H04N9/00 , H04N9/77 , H04N9/78 , H04N11/20
摘要： PURPOSE:To improve the accuracy of detection of movement by using information of speed ot movement for detecting information of movement in addition to detection in frequency domain, and making scanning line interpolation suitable for the property of a picture image. CONSTITUTION:Video signals of base band obtained from an video detector circuit or video signals already made to base band enter an A/D converter and a synchronizing signal separator circuit. In a YC,L,YH separator circuit, both existing television signals, compatible high precision television signals are separated into a luminance signal low band component YL adapted to movement, a chrominance signal C and a high precision signals YH. In such a case, the presence of movement is detected by a movement detector circuit. In an interpolating circuit, scanning lines omitted in the field by interlace scanning in existing television system are interpolated by interpolation signals YTp, ITp, QTp and displayed in a form of 60-frame successive scanning.

20. 发明专利

JPS61136392A Television signal processor 失效
标题翻译：电视信号处理器
公开(公告)号：JPS61136392A
公开(公告)日：1986-06-24
申请号：JP25752384
申请日：1984-12-07
申请人： Hitachi Ltd
发明人： HIRANO YASUHIRO , YOSHIKI HIROSHI , SHIGESA HIDEHIKO
IPC分类号： H04N5/00 , H04N7/00 , H04N7/015
摘要： PURPOSE: To reproduce a picture without deterioration of picture quality by reproducing the picture while using different mode from a till picture and an animation picture so as to prevent a low frequency luminance signal from being reproduced as high definition information in error for the animation picture.
CONSTITUTION: A luminance signal is fed to an HPF1, where a high frequency component is extracted and the high definition information YH converted into a low frequency signal is obtained by a frequency shift circuit 3. Further, the luminance signal and a color signal are converted into the form of an existing television signal by an encoder circuit 2 and the result is added to the high definition information YH at a multiplex circuit 5. On the other hand, a moving detection circuit 4 detects whether a picture is a still picture or an animation picture, and in case of an animation picture, a frequency shift circuit 3 is controlled so that its output is zero. Further, information representing either the still picture or the animation picture mode is inserted by the multiplex circuit 5 during the vertical blanking period and the result is transmitted.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过在从直到图像和动画图像使用不同模式的同时再现图像来再现图像而不降低图像质量，从而防止低频亮度信号作为动画图像的高清晰度信息被错误地再现。构成：将亮度信号馈送到HPF1，其中提取高频分量，并且通过频移电路3获得转换成低频信号的高清晰度信息YH。此外，亮度信号和颜色信号被转换由编码器电路2转换为现有电视信号的形式，并将结果加到多路复用电路5的高分辨率信息YH上。另一方面，移动检测电路4检测图像是静止图像还是动画图像，并且在动画图像的情况下，控制频移电路3，使得其输出为零。此外，在垂直消隐期间，多路复用电路5插入表示静止图像或动画图像模式的信息，并发送结果。

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