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1. 发明专利

JPH05300165A 失效
公开(公告)号：JPH05300165A
公开(公告)日：1993-11-12
申请号：JP10272992
申请日：1992-04-22
申请人： HITACHI LTD
发明人： HAMADA TAKUSHI , SUGIMOTO NORIHIKO , ONISHI KINSHIRO , INADA SHUNJI , OOKURA TAKANORI , YONEDA KATSUHIKO
IPC分类号： H04L12/56 , H04L12/44
摘要： PURPOSE:To suppress data transmission delay time by repeating a data frame to be received to the transmitter of the destination by receiving a destination address contained in the data frame. CONSTITUTION:The data frame from a transmitter 3 having a transmission request is received by a line concentrator 1, the line concentrator 1 judges the transmitter 3 to repeat this data frame by receiving the destination address in this received data frame, and the data frame is repeated to a transmission line 2 to connect this transmitter 3. For example, a star-shaped network to exchange information one and another is constituted by respectively connecting various terminals 41-4n such as computers, work stations or personal computers distributed in various areas through transmission lines 21-2n to the line concentrator 1. In this case, the exchange operation is realized by high-speed switching preserving media access control. Thus, not only the large capacity of packet information can be transmitted but also the transmission can be easily realized at real time.

2. 发明专利

JPS61109093A Image display unit 失效
公开(公告)号：JPS61109093A
公开(公告)日：1986-05-27
申请号：JP23020384
申请日：1984-11-02
申请人： Nippon Telegraph & Telephone , Hitachi Ltd
发明人： TOGAWA MASAO , KODERA HIROSHI , MIYAMOTO SHIGERU , YASUMOTO SEIICHI , ONISHI KINSHIRO
IPC分类号： G06F3/153 , G06F3/033 , G06F3/048 , G09G5/14
CPC分类号： G06F3/04845

3. 发明专利

JPS6416187A ENCODING PARAMETER CONTROL SYSTEM 失效
公开(公告)号：JPS6416187A
公开(公告)日：1989-01-19
申请号：JP17099587
申请日：1987-07-10
申请人： HITACHI LTD
发明人： YANAI NORIBUMI , ONISHI KINSHIRO , TAKAHASHI MASAHIRO
IPC分类号： H04N19/102 , H04N19/124 , H04N19/13 , H04N19/132 , H04N19/15 , H04N19/172 , H04N19/182 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/503 , H04N19/587 , H04N19/59 , H04N19/70 , H04N19/85 , H04N19/93
摘要： PURPOSE:To prevent picture quality degradation accompanying the interpolation of an encoding stopping time and to obtain satisfactory picture quality by prohibiting a cropping by an image dissecting degree at the encoding stopping time. CONSTITUTION:When an encoding stop is obtained, a sub-sample and a field frame drop are prohibitted and they are not executed. Thus, at the encoding stopping time, forecasting error signals 54 are wholly zero, a demodulating signal 158 is equal with a forecasting signal 156 between frames. Accordingly, while the encoding stop is executed, the interpolating signal of of an (n)-th frame is repeatedly outputted. Then, even how much fields the encoding stop is executed over, a border between a black circle mark and a white circle mark is not faded away.

4. 发明专利

JPS63169191A TRANSMISSION ERROR CORRECTING SYSTEM 失效
公开(公告)号：JPS63169191A
公开(公告)日：1988-07-13
申请号：JP41687
申请日：1987-01-07
申请人： HITACHI LTD
发明人： YANAI NORIBUMI , ONISHI KINSHIRO , TAKAHASHI MASAHIRO
IPC分类号： H04N19/50 , H04N19/102 , H04N19/164 , H04N19/423 , H04N19/46 , H04N19/503 , H04N19/65 , H04N19/67 , H04N19/70 , H04N19/85 , H04N19/89 , H04N19/91
摘要： PURPOSE:To contrive the improvement for deterioration of a picture quality due to the correction of a transmission error by omitting an unnecessary rewriting after the completion of a matching between a transmitting device and a receiving device. CONSTITUTION:The receiving device calculates the parity signal of every frame, and compares it with the parity signal from the transmitting device, but when a notice saying that a rewrite signal for a range (b) has been received and a frame memory has been updated and a discordance between the transmitting and the receiving side has been eliminated, is transmitted by the termination time t2 of the second frame period of the transmitting device, it is secured that the transmission error is corrected even if the rewrite information for the ranges (c), (d) is not transmitted. Besides, when the notice saying that the discordance between the transmitting and the receiving side has been eliminated, is too late for the time t2, the transmission of the rewrite information for the range (d) can be omitted by the notice transmitted during the third frame period. Thus, by continuing to refer to a transmission error detection signal during the transmission period of the rewrite information as well, and by omitting the transmission of the rewrite information after the completion of the error correction, the picture quality of a received picture can be improved.

5. 发明专利

JP2006080994A Communication system 有权
标题翻译：通讯系统
公开(公告)号：JP2006080994A
公开(公告)日：2006-03-23
申请号：JP2004264274
申请日：2004-09-10
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： YOSHIDA MASASHI , SAITO MASAHIKO , KIDO MITSUYASU , ONISHI KINSHIRO
IPC分类号： H04L29/08 , H04L12/28
摘要： PROBLEM TO BE SOLVED: To provide a communication system which can transmit a periodic frame and a normal frame on a same transmission line without deteriorating a transmitting efficiency.
SOLUTION: In a communication system connecting a plurality of devices having a transmission function and a reception function, a transmission data frame is classified into a periodic frame and a normal frame. The periodic frame is a frame transmitted periodically with a fixed time interval without requesting a reception device to transmit a reception confirmation response. The normal frame is a frame requesting the reception device to transmit the reception confirmation response by a non-periodic transmission, and transmits the periodic frame with a fixed period. When the normal frame is transmitted after a driving request response based on a driving request, and when the normal frame can not be transmitted within the concerned period, it is transmitted after the transmission of the periodic frame of a subsequent period and is transmitted on the same transmission line.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种在不会降低发送效率的情况下在同一传输线上传输周期性帧和正常帧的通信系统。解决方案：在连接具有发送功能和接收功能的多个设备的通信系统中，将发送数据帧分类为周期性帧和正常帧。周期性帧是以固定时间间隔周期性地发送的帧，而不请求接收装置发送接收确认响应。正常帧是请求接收装置通过非周期性传输发送接收确认响应的帧，并以固定周期发送周期性帧。当在基于驾驶请求的驾驶请求响应之后发送正常帧时，并且当在相关周期内不能发送正常帧时，在后续周期的周期性帧的发送之后发送，并且在相同的传输线。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JPS61224683A COMMUNICATION CONFERENCE DEVICE 失效
公开(公告)号：JPS61224683A
公开(公告)日：1986-10-06
申请号：JP6368585
申请日：1985-03-29
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAGUCHI SHOJI , YASUMOTO SEIICHI , ONISHI KINSHIRO , TOGAWA MASAO , KODERA HIROSHI
IPC分类号： H04N7/14 , G06F13/00 , H04M3/56 , H04N7/15
摘要： PURPOSE:To make the attribution specification at the time of inputting picture information in order to display or erase it unnecessary by handling input information so that it can act as common information or personal information in accordance with the terminal when picture and control information is inputted. CONSTITUTION:When the 1st communication conference terminal 11 is of a demonstrator and a communication conference terminal for the 2nd and 3rd 11 is of a listener, the common information 911 inputted by the 1st is transmitted to the 2nd and 3rd through a data transmitting and receiving line 355 being a communication line, displayed and stored in a common information file 63. Then the demonstration turn is shifted to the 2nd through a communication conference controller 13 and the 2nd inputs the common information 912. Then it is transmitted to the 1st and 3rd listens through the data transmitting and receiving line 355 being the communication line, displayed and stored in the common information file. Here the common information has the attribute of each terminal into which said information is inputted, and accordingly such discrimination can be possible which terminal the common information is inputted through. A piece of personal information 921, 922 and 923 inputted when each terminal is in a listener mode is stored on the personal information file inherent to each terminal.

7. 发明专利

JPH05207035A DATA TRANSMISSION SYSTEM 失效
公开(公告)号：JPH05207035A
公开(公告)日：1993-08-13
申请号：JP1322192
申请日：1992-01-28
申请人： HITACHI LTD
发明人： OOKURA TAKANORI , HAMADA TAKUSHI , ONISHI KINSHIRO , SUGIMOTO NORIHIKO
IPC分类号： H04Q3/58 , H04L12/40
摘要： PURPOSE:To reduce the number of times of back-off after the collision of a data frame, and to shorten data frame transmission delay time, and to improve a throughput. CONSTITUTION:In a data transmission system provided with transmitting devices 2A to 2N to transmit and receive a data frame by a time division mode, a repeater system 1 to repeat and transmit the data frame transmitted by some transmitting device to another transmitting device, and in addition, request the transmitting device having transmitted the data fram to re-transmit the data frame, and a data transmission line 3 connecting the transmitting devices 2A to 2N and the repeater system 1, the repeater system 1 makes the transmitting device requesting the new data frame transmission receive a dummy frame for transmission delay information in the case that the data frame can not newly transmitted because of the collision of the data frame, and at the time of the cancellation of the collision of the data frame, it stops generating the dummy frame, and requests the transmitting device to re-transmit the data frame so as to repeat and transmit the data frame from the transmitting device to the destination transmitting device.

8. 发明专利

JPS6293764A IMAGE REDUCING METHOD 失效
公开(公告)号：JPS6293764A
公开(公告)日：1987-04-30
申请号：JP23353585
申请日：1985-10-21
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： MARUYAMA HISAYUKI , ONISHI KINSHIRO , TAKAHASHI MASAHIRO , YASUMOTO SEIICHI , KODERA HIROSHI
IPC分类号： G06F3/153 , G06K9/36 , G06T1/00 , G06T3/40 , G09G5/36 , H04N1/393
摘要： PURPOSE:To obtain an image reducing method which scarcely generates the omission of an image, in s short processing time, by setting an are which is formed by the picture element of N points in the periphery of a projection point on the original image of a picture element on a reduced image, dividing this area into M pieces of small areas, deriving the density of the area from the density of each small area, and determining white/black of the picture element. CONSTITUTION:An original image 10 is reduced to 1/2, and converted to a reduced image 11. Picture elements contained in an area 12 are 16 points of I1-I6, but these picture elements are further subdivided into four areas of small areas 20-23, and by the value of these small areas 20-23, the representative picture element of the area 12 is determined. This representative picture element becomes, namely, the picture element P of the reduced image 11, and stores in a memory in a work area. In the same way, when areas 13-15 are considered, it may suffice that the value of each small area is derived once.

9. 发明专利

JPS61214081A METHOD FOR RECOGNIZING CLOSED AREA 失效
公开(公告)号：JPS61214081A
公开(公告)日：1986-09-22
申请号：JP5450485
申请日：1985-03-20
申请人： HITACHI LTD , NIPPON TELEGRAPH & TELEPHONE
发明人： ONISHI KINSHIRO , TAKAHASHI MASAHIRO , YASUMOTO SEIICHI , TOGAWA MASAO , KODERA HIROSHI
IPC分类号： G06T7/60 , G06K9/46
摘要： PURPOSE:To omit an image memory and to shorten the time between the end of writing and the end of recognition by detecting the coordinates of a sampling point and recognizing an optional closed area in the form of gathering of segments between register points of a table. CONSTITUTION:A curve enclosing an area to be erased is supplied to a handwriting input part 1, and the coordinate data on the input curve is sampled at an appropriate time interval and detected in the form of a discrete spot string. A control part 2 recognizes the area enclosed by the curve out of the detected spot string as an aggregation of segments which are parallel to a coordinate axis. Then a display memory 3 and a picture memory part 5 are controlled for erasion of pictures or drawn images included in the aggregation area of each segment. here a spot which satisfies the prescribed conditions is obtained out of a processing subject point and its subsequent points as well as an interpolation spot string obtained by giving the interpolation among the sampling points on the curve enclosing the area to be erased. These obtained spots are registered successively on a table. Then the coordinates of each picture element are replaced with the coordinates of each small section for recognition of a closed area.

10. 发明专利

JPH0575586A NETWORK SYNCHRONIZING SIGNAL TRANSMISSION METHOD 失效
公开(公告)号：JPH0575586A
公开(公告)日：1993-03-26
申请号：JP23295291
申请日：1991-09-12
申请人： HITACHI LTD
发明人： ONISHI KINSHIRO , SUGIMOTO NORIHIKO , HATAKEYAMA YASUHIKO
IPC分类号： H04L7/00 , H04L12/28 , H04Q11/04
摘要： PURPOSE:To avoid jitter accumulation at the time of reproducing and repeating a network synchronizing signal in each node by limiting the time length of one period of the quantized network synchronizing signal within a certain range. CONSTITUTION:A latch 1 outputs the received network synchronizing signal to a signal line 23 synchronously with a self-node clock. If the time length of one period of the network synchronizing signal received at present is shorter than the prescribed range, a condition discriminating circuit 8 outputs a set signal to a signal line 30 in accordance with a prescribed logic and sets a state register 2. When the time of one period of a reproducing system network synchronizing signal reaches the prescribed range to output a signal 26 from a decoder 5, a reproducing position signal 29 is outputted to not only set reproducing system synchronizing signal time position information to a latch 10 but also reset a network synchronizing system clock counter 4 and the register 2. Thus, the time of one period of the reproducing system network synchronizing signal is limited within the prescribed range, and jitter accumulation is avoided at the time of reproducing and repeating the network synchronizing signal in each node.

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