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41. 发明专利

JPS63272193A TELEVISION RECEIVER 失效
公开(公告)号：JPS63272193A
公开(公告)日：1988-11-09
申请号：JP10421887
申请日：1987-04-30
申请人： HITACHI LTD
发明人： NAKAGAKI NOBUFUMI , MORI TAKAYUKI , KURITA TOSHIYUKI , MURATA TOSHINORI
IPC分类号： H04N9/73
摘要： PURPOSE:To reduce the number of elements by inserting a simple circuit, which varies a DC voltage, instead of conventional contrast control circuit and brightness control circuit. CONSTITUTION:A cut-off level and drive level reference power source 101 generates reference voltages of the cut-off level and the drive level and sends them to a comparator. A counter 102 sets a cut-off detection period in a 1H period and sets a drive detection period in the next 1H period. A power source 103 for cut-off and drive detection signal generates a DC voltage proper to insertion and sends it to a cut-off detection signal control circuit 104 and a drive detection signal control circuit 105. The cut-off detection signal control circuit 104 changes the DC value of the cut-off detection signal in accordance with brightness information sent from a control circuit 27. Thus, the number of circuits which adjust the gain of the video signal is reduced to one and the number of circuits which adjust the DC level of the video signal is reduced to one to reduce the number of elements, and an excess current is reduced.

42. 发明专利

JPH10257446A METHOD AND DEVICE FOR RECEIVING DATA BROADCASTING 失效
公开(公告)号：JPH10257446A
公开(公告)日：1998-09-25
申请号：JP5335697
申请日：1997-03-07
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： TAKESUE JUNICHI , MORI TAKAYUKI , TORIGOE SHINOBU , KURITA TOSHIYUKI
IPC分类号： H04N5/44 , H04N7/025 , H04N7/03 , H04N7/035
摘要： PROBLEM TO BE SOLVED: To provide a data broadcast receiver with which the data of the other channel can be stored in a data memory even during the output of data broadcast and these stored data can be used and speedily outputted when the relevant data are requested. SOLUTION: Concerning a data broadcast receiving method for the data broadcast receiver with which data are extracted from a signal multiplexing these data and stored and designated data are decoded out of these stored data and outputted, any signal is selected by 1st signal selection processing 2 based on designation processing 1, the multiplexed data are extracted from this selected signal and stored in a data memory 4 by 1st data broadcast reception processing 3, the other signal is selected through the 1st signal selecting processing 1 by 2nd signal selecting processing 5, and the multiplexed data are extracted from this selected signal and stored in the data memory 4 by signals by 2nd data broadcast reception processing 6. When any data are newly designated by the designation processing 1, these data are decoded by decoding processing 7 while using the data stored in the data memory 4.

43. 发明专利

JPH09233403A IMAGE DISPLAY DEVICE 失效
公开(公告)号：JPH09233403A
公开(公告)日：1997-09-05
申请号：JP6257097
申请日：1997-03-17
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： KURITA TOSHIYUKI , NAKAGAKI NOBUFUMI , MORI TAKAYUKI , SUZUKI SUNAO
IPC分类号： H04N5/46 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To display an image without distortion and to prevent uneven deterioration in the fluorescent material of a screen in the image display device whose aspect ratio differs from that of a standard television signal by using a compression means so as to compress the standard television signal in a time base direction and displaying the resulting signal onto the display device. SOLUTION: Time base revision means 117, 110, 111, 116 store a received standard television signal to revise the time base of the standard television signal so that the standard television signal is compressed in a time base direction in a rate of the aspect ratio of the display device screen to the aspect ratio of the standard television signal. A frame signal insert means 119 inserts a frame signal with a prescribed signal level to a non-signal part located at both ends of the display screen caused due to the rate of the aspect ratio of the display device screen to the aspect ratio of the standard television signal.

44. 发明专利

JPH09214851A TELEVISION RECEIVER 失效
公开(公告)号：JPH09214851A
公开(公告)日：1997-08-15
申请号：JP2281696
申请日：1996-02-08
申请人： HITACHI LTD
发明人： KAMOGAWA KOJI , NAKAGAKI NOBUFUMI , TORIGOE SHINOBU , MORI TAKAYUKI
IPC分类号： H04N5/45
摘要： PROBLEM TO BE SOLVED: To record and reproduce two image patterns for television video and audio signals simultaneously by selectively displaying either of the two image patterns and selecting a proper audio signal. SOLUTION: A reproduction signal is received by a video input 805 and audio inputs 806, 807 respectively. A video signal is selected by a switch SA 801 and given to a scanning line conversion circuit 701. The scanning line conversion circuit 701 reads the video signal given to the video input 1 to extend twice the image in the horizontal direction. As the embodiment to selectively display a left or a right video image, it is realized by selecting a phase difference between a write reset pulse and a read reset pulse to be O-degree or 180-degree or the like with respect to a horizontal phase. An output video signal from the scanning line conversion circuit 701 is subject to processing such as amplitude adjustment, color correction and DC recovery by a video signal processing circuit 403 and the processed signal is given to a signal changeover device 707 and the resulting signal is displayed on a cathode ray tube 404 as it is. In this case, an audio signal corresponding to the reproduced image is selected by an audio changeover switch 808.

45. 发明专利

JPH07162751A IMAGE FEATURE DETECTOR, IMAGE ADJUSTING SYSTEM, CAPTION EDITING SYSTEM AND TELEVISION RECEIVER 失效
公开(公告)号：JPH07162751A
公开(公告)日：1995-06-23
申请号：JP14053794
申请日：1994-06-22
申请人： HITACHI LTD
发明人： BANDO YUMI , MORI TAKAYUKI , NAKAGAKI NOBUFUMI , MURATA TOSHINORI , TORIGOE SHINOBU , SUZUKI SUNAO
IPC分类号： H04N5/278 , H04N5/262 , H04N5/445 , H04N5/46
摘要： PURPOSE:To detect the boundary location of a video area and a no-image part when video where the no-image part exists in the upper and lower parts of video is inputted as a video signal. CONSTITUTION:When the signal level of a video signal to be inputted is lower than a luminance level L, an amplitude direction decision part 117 decides that the signal is the one belonging to a no-image part. When the number of data where the signal is decided to be the one belonging to the non-image part is more than a set value C per horizontal scanning period, a horizontal direction decision part 118 decides the period as the horizontal scanning period belonging to the non-image part. A vertical direction decision part 119 decides where the boundary location of a video area and the non-image part is from the decision result by the horizontal direction decision part 118. A time direction decision part 120 integrates the boundary location of the video area and the non-image part obtained by the decision in the time direction and performs a final judgment.

46. 发明专利

JPH06350873A TELEVISION RECEIVER 失效
公开(公告)号：JPH06350873A
公开(公告)日：1994-12-22
申请号：JP13736793
申请日：1993-06-08
申请人： HITACHI LTD
发明人： MORI TAKAYUKI , NAKAGAKI NOBUFUMI , BANDO YUMI , MURATA TOSHINORI
IPC分类号： H04N5/16 , H04N5/57
摘要： PURPOSE:To automatically and adequately execute the adjustment of picture quality without neglecting a signal part existing in a small number by detecting the white peak value and the black peak value of a video signal and video information quantity, and controlling optimally the video signal of every gradation by these values. CONSTITUTION:A video information detecting part 5 is constituted of a white peak detection circuit 8 to detect the white peak of a luminance signal, a black peak detection circuit 9 to detect the black peak of the luminance signal, and an information quantity detection circuit 11 to detect the information quantity of every luminance level of the luminance signal. A signal processing circuit 14 executes arithmetic operation on the basis of these video information by using fuzzy inference, and generates a control signal to control the video signal. Accordingly, the adjustment to make a picture easy to see in which the white paint-out of a bright part existing in a small number is not caused even if the luminance level is heightened when the picture has been dark thus far, and on the contrary, even if the luminance level is lowered when the picture has been bright thus far, the black paint-out of a dark part existing in a small number is hardly caused can be executed automatically.

47. 发明专利

JPH0654339A TELEVISION RECEIVER 失效
公开(公告)号：JPH0654339A
公开(公告)日：1994-02-25
申请号：JP20371092
申请日：1992-07-30
申请人： HITACHI LTD
发明人： MORI TAKAYUKI , NAKAGAKI NOBUFUMI , BANDO YUMI , HIRAHATA SHIGERU
IPC分类号： H04N9/68 , H04N9/77
摘要： PURPOSE:To enable the color saturation correction of chrominance signals corresponding to gradation correction by a simple circuit without interference by performing control at the circuit for simultaneously correcting luminance signals and the chrominance signals. CONSTITUTION:The luminance signal inputted to an input terminal 16 is delayed for delay time in a luminance signal correction circuit 1 to which the luminance signal is simultaneously inputted at a delay circuit 6 and the delay time of a correction luminance signal and the luminance signal at a subtractor 11 are subtracted together to be outputted as a correction amount. Then, it is defined as prescribed gain at a gain control circuit 14 and is subtracted from the output of a constant voltage source 13 at the subtractor 12. It is inputted to an LPF 10, high-frequency components to be the interference are band-pass limited and only low frequencies are outputted. The output is added to a contrast control voltage and a color control voltage at an adder 9 and outputted to a chrominance demodulation circuit 5. At the circuit 5, by the output voltage of the adder 9, the amplitude of carrier chrominance signals from the input terminal 17 is changed and color difference signals R-Y, G-Y and B-Y are outputted, added to the luminance signals at a matrix circuit 3 and outputted to a CRT 4.

48. 发明专利

JPH0591367A TELEVISION RECEIVER 失效
公开(公告)号：JPH0591367A
公开(公告)日：1993-04-09
申请号：JP27352091
申请日：1991-09-26
申请人： HITACHI LTD
发明人： MORI TAKAYUKI , NAKAGAKI NOBUFUMI , MURATA TOSHINORI
IPC分类号： H04N5/208
摘要： PURPOSE:To obtain a picture with high picture quality less in a fog or roughness in matching with the visual characteristic by controlling picture quality correction quantity and noise reduction quantity in response to the content of a video image. CONSTITUTION:A luminance noise reduction circuit 2 reduces a noise component of a luminance signal. A picture quality correction circuit 3 emphasizes a high frequency component to improve the sharpness. A contour detection circuit 4 detects a contour quantity at a prescribed area. A contour area discrimination circuit 5 discriminates whether or not the area is a contour area. A control signal generating circuit 6 controls the luminance noise reduction circuit 2 and the picture quality correction circuit 3. A frequency detection circuit 10 detects the frequency characteristic of the output of the contour detection circuit 4.

49. 发明专利

JPH03263977A TELEVISION RECEIVER 失效
公开(公告)号：JPH03263977A
公开(公告)日：1991-11-25
申请号：JP17644990
申请日：1990-07-05
申请人： HITACHI LTD
发明人： NAKAGAKI NOBUFUMI , MORI TAKAYUKI , MURATA TOSHINORI
IPC分类号： H04N5/208
摘要： PURPOSE:To obtain a sufficient noise reduction effect and to obtain a signal without missing of contour by controlling a limiter level of a noise reduction circuit including a cyclic filter or a feedback coefficient K with a vertical contour component of a luminance signal or a chrominance carrier signal. CONSTITUTION:A chrominance carrier signal for one vertical scanning period is inputted from an input terminal 100. The chrominance carrier signal is inputted to an adder 11 and added to a delay signal outputted from a 1H delay element 1 delayed by one horizontal scanning period. A contour signal component with a large level is eliminated from a signal B outputted from the adder 11 at a limiter circuit 8 and a vertical contour signal component with a level lower than the limiter level and a noise component are outputted. On the other hand, the vertical contour component signal E of the luminance signal is inputted to a gain coefficient control section of a coefficient device 10, and when the vertical contour component of the luminance signal exists, the gain coefficient K of the coefficient device 10 is decreased and when the vertical contour component of the luminance signal does not exist, the gain coefficient K of the coefficient device 10 is set to a prescribed value.

50. 发明专利

JPH0260375A TELEVISION RECEIVER 失效
公开(公告)号：JPH0260375A
公开(公告)日：1990-02-28
申请号：JP21070988
申请日：1988-08-26
申请人： HITACHI LTD
发明人： NAKAGAKI NOBUFUMI , MORI TAKAYUKI , KURITA TOSHIYUKI , MURATA TOSHINORI
IPC分类号： H04N5/20
摘要： PURPOSE:To stably clip the white peak by providing a beam current detecting circuit which detects a beam current flowing to a cathode-ray tube and using detection of the beam current to perform feedback control. CONSTITUTION:R, G, and B signals inputted to terminal 101 to 103 pass white peak clipping circuits 106 to 108 and are inputted to a cathode-ray tube 122. After being detected by beam current detecting circuits 115 to 117, the beam current flowing to the cathode ray tube 122 is converted to detected voltages by detecting resistances 125 to 127. Detected voltages are inputted to comparators 118 to 120 and are compared with the reference voltage of a reference power source 124. White peak clip voltages inserted to switches 109 to 111 are changed in accordance with comparison results. Meanwhile, a control signal generating circuit 121 generates a white peak control period signal by a horizontal blanking signal and a vertical blanking signal to control operations of switches 109 to 111 and comparators 118 to 120.

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