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1. 发明专利

JPH0646454A MOTION DETECTING CIRCUIT 失效
公开(公告)号：JPH0646454A
公开(公告)日：1994-02-18
申请号：JP19673392
申请日：1992-07-23
申请人： HITACHI LTD
发明人： YOSHIZAWA KAZUHIKO , OWASHI HITOAKI , HOSOKAWA KYOICHI , YOSHIKOSHI MIYOKO
IPC分类号： H04N9/87 , H04N5/93
摘要： PURPOSE:To provide a motion detecting circuit which can always detect the correct motions regardless or the normal reproduction mode, the slow motion reproduction mode or the pattern showing the presence or absence of an edge, etc. CONSTITUTION:The input video signal is delayed by a memory delay line 110 in response to a reproduction mode, and the motion signals are detected by the subtractors 141 and 142. Then the motion signals undergo the motion expansion processing through a time space filter consisting of the synthesizing circuit 155, 162 and 173, the delay circuits 161, and 171, and a coefficient unit 172, etc. The moving quantity of these processed motion signals are controlled by the motion signal control circuits 180 and 181 based on the detection results of an edge detecting circuit 120 and a slow reproduction detecting circuit 130. That is, the motion signals are normally reduced on an edge part compared with other parts in a reproduction mode.

2. 发明专利

JPH05137160A FIELD CONVERTING CIRCUIT 失效
公开(公告)号：JPH05137160A
公开(公告)日：1993-06-01
申请号：JP29702291
申请日：1991-11-13
申请人： HITACHI LTD
发明人： YOSHIKOSHI MIYOKO , OWASHI HITOAKI , HOSOKAWA KYOICHI , YOSHIZAWA KAZUHIKO , TAKAHASHI TOSHIAKI
IPC分类号： H04N9/64 , H04N9/79 , H04N9/87 , H04N11/20
摘要： PURPOSE:To eliminate a centroid movement, and also, to eliminate deterioration of oblique resolution by detecting a separated luminance signal, executing a still picture processing, in the case of a still picture, and varying a mixing ratio in accordance with a motion signal and synthesizing it, in the case of a motion picture. CONSTITUTION:A luminance signal separated by a motion adaptive Y/C separating circuit is inputted to a motion detecting circuit 50. In the case it is decided to be a still picture by the circuit 50, a still image processing is executed by a luminance signal Y adaptive scanning line converting circuit 70, and in the case it is decided to be an animated picture, an animated picture processing is executed by the luminance signal Y adaptive scanning line converting circuit 70. In such a state, based on a control signal from a signal control circuit 100, from a first - a third taps of a delaying circuit 20 with a tap, signals B2V-C5V are outputted to an inputted video signal C1V. Also, a soft switch circuit 40 is set so as to become a motion mode by the circuit 50. As a result, outputs of the still picture and the animated picture from the converting circuit 70 are synthesized by varying a mixing ratio in accordance with the motion signal from the circuit 50. In such a way, a centroid movement is eliminated, and also, deterioration of oblique resolution can be prevented.

3. 发明专利

JPH04260293A FIELD CONVERSION DEVICE 失效
公开(公告)号：JPH04260293A
公开(公告)日：1992-09-16
申请号：JP2180191
申请日：1991-02-15
申请人： HITACHI LTD
发明人： HOSOKAWA KYOICHI , OWASHI HITOAKI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO
IPC分类号： H04N5/783 , H04N5/93 , H04N9/77 , H04N9/79 , H04N9/793 , H04N9/87 , H04N11/20
摘要： PURPOSE:To realize field conversion processing in which an excellent reproduced picture is obtained even at special reproduction. CONSTITUTION:The field conversion is implemented by using an output of an inter-line signal processing circuit 650 for a moving picture and using an output of a border signal processing circuit 670 selecting gradually an output of the said inter-line signal processing circuit 650 and an output of an inter-field signal processing circuit 660 for a border in which a moving picture and a still picture are switched in response to a moving detection section of a reproduction signal. An excellent reproduction picture is obtained without fluctuation in the vertical direction for a luminance edge and a chrominance edge portion of a still picture in the vertical direction in the field conversion processing at special reproduction.

4. 发明专利

JPH06243060A ELECTRONIC MAIL SYSTEM 失效
公开(公告)号：JPH06243060A
公开(公告)日：1994-09-02
申请号：JP2644693
申请日：1993-02-16
申请人： HITACHI LTD
发明人： HOSOKAWA KYOICHI , WATAYA YOSHIZUMI , NISHIMURA KEIZO , OWASHI HITOAKI , OKAMURA FUJIO , ARAI HIDEO , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO , SUGIMURA NAOZUMI
IPC分类号： G06F13/00 , H04L12/54 , H04L12/58
摘要： PURPOSE:To provide a system having a function for leaving the message of a message board and a function for transmitting the message to a prescribed place. CONSTITUTION:A terminal is provided with a storage medium 150 accumulating plural documents and the display devices 170 and 171 of the documents by using the electronic mail system consisting of a host computer 1, terminal groups 20-22 and a network 10 connecting the host computer 1 and the terminal groups 20-22. In the case of a message mail, it is not stored in the host computer 1 but it is immediately displayed on the terminal of a destination. The convenient electronic mail system provided with the usual function for leaving the message and the function for transmitting the message to the prescribed place can be realized.

5. 发明专利

JPH06165215A METHOD AND DEVICE FOR PROCESSING VIDEO SIGNAL 失效
公开(公告)号：JPH06165215A
公开(公告)日：1994-06-10
申请号：JP30847792
申请日：1992-11-18
申请人： HITACHI LTD
发明人： OWASHI HITOAKI , HOSOKAWA KYOICHI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO , NISHIMURA KEIZO
IPC分类号： H04N5/937 , H04N5/93 , H04N9/79
摘要： PURPOSE:To easily adjust an analog circuit system by allowing a composite video signal stored in a field memory to pass through the circuit of the same video signal processor. CONSTITUTION:A memory 120 is provided in the video signal processor, and the video signal is stored in the memory 120. The stored video signal is read from the memory 120, and when the field number of the read video signal is different from the field number of the field to be outputted, the video signal is field-converted and outputted. Then, the output video signal is inputted to the video signal processor again. The video signal inputted in each field ((m) field) which is the integer multiple of a repeating cycle peculiar to the input video signal is stored in the memory 120, and the composite video signal read from the memory 120 is converted by a field conversion circuit 140, and outputted as the standard video signal. Also, the video signal is written in the memory 120 in each (m)field, so that the signal written in the memory 120 is not field-converted.

6. 发明专利

JPH05137157A CONTROL METHOD FOR FIELD CONVERTING CIRCUIT 失效
公开(公告)号：JPH05137157A
公开(公告)日：1993-06-01
申请号：JP29702091
申请日：1991-11-13
申请人： HITACHI LTD
发明人： OWASHI HITOAKI , HOSOKAWA KYOICHI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO , INAGAKI YASUO
IPC分类号： H04N5/76 , H04N7/01 , H04N9/79 , H04N9/87
摘要： PURPOSE:To eliminate a centroid movement and deterioration of vertical resolution at the time of variable speed reproduction by selecting a phase inversion signal or a signal which is not inverted, in accordance with whether the direction in which a video signal is sent is forward or reverse, in the case of freezing a composite video signal. CONSTITUTION:A chrominance signal AIC of the present field is inputted from a Y/C separating circuit 20, and inputted to one terminal of a C scanning line converting circuit 41. Also, from the other terminal, a signal B2C being in a relation interlaced with a signal of the present field is inputted. To the other terminal, a control signal for showing forward turn or reverse turn reproduction, and also, a state is inputted from a signal control circuit 61. In such a state, in the case of forward turn reproduction, since it is inverted against a phase of a chrominance subcarrier of a position B2, an output of a phase inversion circuit is selected. On the other hand, in the case of reverse turn reproduction, the signal B2C is selected. In such a way, when a freeze signal processing is executed, a centroid movement and deterioration of vertical resolution of a freeze picture can be eliminated, and a picture quality at the time of variable speed reproduction is improved.

7. 发明专利

JPH05122659A FIELD CONVERTER 失效
公开(公告)号：JPH05122659A
公开(公告)日：1993-05-18
申请号：JP30823091
申请日：1991-10-29
申请人： HITACHI LTD
发明人： HOSOKAWA KYOICHI , OWASHI HITOAKI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO , TAKAHASHI TOSHIAKI
IPC分类号： H04N5/93
摘要： PURPOSE:To attain satisfactory field conversion processing which is not affected by the generation of reproduction abnormality by providing a protecting circuit detecting the abnormal state of a recording and reproducing device to generate a gate signal and providing a gate circuit making a movement signal pass in a period excepting for the gate signal and outputting the movement signal of a prescribed value in period of the gate signal. CONSTITUTION:The converter is provided with the protecting circuit 70 detecting the abnormal state of the recording and reproducing device at the time of reproduction to output the gate signal in a prescribed period based on the detection and the gate circuit 31 making the movement signal generated in a movement detecting circuit 30 pass in the period excepting for the gate signal and outputting the movement signal of the prescribed value which is previously decided without regard to the movement signal generated in the movement detecting circuit 30 in the period of the gate signal. When the protecting circuit 70 detects the abnormal state of the recording and reproducing device, the gate circuit 31 outputs the movement signal of the prescribed value and a field converting circuit 40 processes the reproducing video signal in accordance with it. Thus, affection caused by the abnormal operation of the recording and reproducing device is eliminated.

8. 发明专利

JPH04330895A FIELD CONVERTING CIRCUIT 失效
公开(公告)号：JPH04330895A
公开(公告)日：1992-11-18
申请号：JP29414191
申请日：1991-11-11
申请人： HITACHI LTD
发明人： OWASHI HITOAKI , HOSOKAWA KYOICHI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO
IPC分类号： H04N9/87
摘要： PURPOSE:To improve the picture quality at the time of the variable speed reproduction by using a signal between fields at a still picture part, using a signal between lines at an animation part and performing the line conversion respectively by a C adaptive converting circuit and a Y adaptive converting circuit. CONSTITUTION:The reproduced composite video signal is separated to a luminance signal Y and a carrier chrominance signal C by a frame Y/C separating circuit and a line Y/C separating circuit. Further, even the 1 field delayed composite video signal is separated to the luminance signal and the chrominance signal by the frame Y/C separating circuit. When it is detected that the action is not performed by an action detecting circuit 90 to detect the presence of the action of the inputted video signal, a luminance signal adaptive converting circuit 70 and a carrier chrominance signal adaptive converting circuit 60 performs the line conversion with a signal between fields and when it is detected that the action is performed, performs the line conversion with a signal in fields. The output signals of converting circuits 70 and 60 is added by an adder circuit 80 and outputted as the video signal after the conversion. Thus, the resolution deterioration of the luminance signal and the chrominance signal can be prevented.

9. 发明专利

JPH07334925A RECORDING AND REPRODUCING DEVICE FOR DISK-SHAPED MEDIUM 失效
公开(公告)号：JPH07334925A
公开(公告)日：1995-12-22
申请号：JP12221394
申请日：1994-06-03
申请人： HITACHI LTD
发明人： YOSHIKOSHI MIYOKO , OWASHI HITOAKI
IPC分类号： G11B20/10 , G11B19/02 , G11B19/247 , G11B19/28 , G11B20/14
摘要： PURPOSE:To realize a recording and reproducing with a right amount of signals by controlling the movement of recording means or reproducing means and writing to a buffer means in accordance with the amount of data stored in the buffer means. CONSTITUTION:Signals recorded in a disk 17 are read by a pickup 16 and temporarily stored in a buffer memory 19. They are outputted from an output terminal 11 with a specified field frequency through a reproduced signal processing circuit that performs bit expansion signal processing corresponding to a recorded signal processing circuit 12. When the amount of data stored in the buffer memory 19 becomes less than a specified value N1, the movement of pickup 16 and writing of reproduced data to the buffer memory 19 are started again. By repeating the above processing, data can be continuously read from the buffer memory 19 to output the signals of a specified field frequency from the terminal 11.

10. 发明专利

JPH06217279A IMAGE DATA PROCESSOR 失效
公开(公告)号：JPH06217279A
公开(公告)日：1994-08-05
申请号：JP515493
申请日：1993-01-14
申请人： HITACHI LTD
发明人： NAKA KAZUTAKA , HOSOKAWA KYOICHI , OWASHI HITOAKI , YOSHIZAWA KAZUHIKO , YOSHIKOSHI MIYOKO , WATAYA YOSHIZUMI
IPC分类号： H04N1/415 , H04N19/12 , H04N19/126 , H04N19/134 , H04N19/136 , H04N19/14 , H04N19/146 , H04N19/147 , H04N19/172 , H04N19/176 , H04N19/196 , H04N19/423 , H04N19/46 , H04N19/60 , H04N19/625 , H04N19/65 , H04N19/70 , H04N19/85 , H04N19/91 , H04N7/133
摘要： PURPOSE:To improve picture quality deterioration at an edge part such as a character periphery and to control the amount of data after compression to a specific value in field or frame units. CONSTITUTION:The edge part is decided from orthogonally transformed data and while a quantization weight distribution is switched, a 1st quantizing circuit 7 performs quantization on the basis of the quantization weight distribution to calculate a quantization coefficient (QM). This quantization coefficient (QM) is multiplied by the quantization weight distribution switched by the edge part decision making and a 2nd quantizing circuit 13 quantizes delayed orthogonally transformed data to generate a variable length encoding output. Thus, the quantization is performed with the quantization weight distribution matching the features of an input image, so recording and transmission of high picture quality are enabled. Further, the total amount of encoded data in one frame or one frame of the input image can be suppressed below a certain value.

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