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21. 发明专利

JP2003204529A SIGNAL CONVERTER AND VIDEO DISPLAY DEVICE 审中-公开
公开(公告)号：JP2003204529A
公开(公告)日：2003-07-18
申请号：JP2002002006
申请日：2002-01-09
申请人： HITACHI LTD
发明人： SAKAI TAKESHI , MATONO TAKAAKI , TAKADA HARUKI , KIMURA KATSUNOBU , HASEGAWA AKIRA
IPC分类号： G09G3/36 , G09G5/00 , G09G5/391 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To provide a signal converter and a video display device capable of capturing correct data even when an input timing of a received digital video signal is changed. SOLUTION: The signal converter is characterized by comprising, a first delay adjustment means 25 for delaying at least one of a digital input video signal, a synchronizing signal synchronously with the digital input video signal, a display period signal and a dot clock, a data capturing means 24 for capturing the digital input video signal, the synchronizing signal and the display period signal on the basis of the dot clock from the first delay adjustment means to latch the data, a control means 9 for adjusting the delay of the first delay adjustment means depending on a value of the data latched by the data capturing means, and a conversion means 10 for converting the data from the data capturing means into a video signal with a prescribed frequency and a prescribed number of pixels. COPYRIGHT: (C)2003,JPO

22. 发明专利

JP2002010219A IMAGE SIGNAL PROCESSING DEVICE 失效
公开(公告)号：JP2002010219A
公开(公告)日：2002-01-11
申请号：JP2000187507
申请日：2000-06-19
申请人： HITACHI LTD
发明人： TAKADA HARUKI , MATONO TAKAAKI , KIMURA KATSUNOBU , SAKAI TAKESHI , HASEGAWA AKIRA
IPC分类号： H04N5/14 , H04N5/21 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To provide an image signal processing device which achieves high quality image display with reduced flicker interference according to form of an image signal for television system and display monitor when the device receives the image signal for television system such as NTSC, PAL, SECAM or HDTV system, etc. SOLUTION: A image signal processing device provides a sequential double speed converting means and a double speed converting circuit. The sequential double speed converting means increases the number of scan lines per a field in an input image signal and converts into sequential double speed signal. The double speed converting circuit includes a field double speed converting means which increases field frequency of the input image signal and converts into a field double speed signal. The device selects the sequential double speed converting means or a double speed converting means in response to the format of the input image signal, a kind of display monitor or combination of both.

23. 发明专利

JP2001184038A VIDEO SIGNAL PROCESSING DEVICE 失效
公开(公告)号：JP2001184038A
公开(公告)日：2001-07-06
申请号：JP36513099
申请日：1999-12-22
申请人： HITACHI LTD
发明人： MIZUGUCHI TAKAHIRO , MATONO TAKAAKI , SAKAI TAKESHI , HASEGAWA AKIRA
IPC分类号： H04N5/66 , G09G5/00 , G09G5/391
摘要： PROBLEM TO BE SOLVED: To obtain a good quality reproduced video by eliminating the influence of flickers associated with thinning processing at the time of compressing an input video signal data in the vertical direction. SOLUTION: A digital video signal is supplied to VRAMs 3 from an A-D converter 2. A line detection means 5 detects the number of lines per field of this digital video signal, and when this exceeds the number of lines of a display screen of a display panel 8, this digital video signal is processed by thinning and is written in the VRAMs 3. When a refresh rate detection means 6 judges that the refresh rate of the digital video signal does not exceed a preset reference value, a controller 4 processes the digital video signal by thinning in such a manner that flickers are not generated in the digital video signal and writes the resultant signal in the VRAMs 3, and when the means judges that the refresh rate exceeds a preset reference value, the controller processes the digital video signal by thinning in such a manner that missing of the pixel data is reduced and writes the resultant signal in the VRAMs 3.

24. 发明专利

JP2001125557A HUE AND SATURATION REGULATING DEVICE AND IMAGE DISPLAY DEVICE AND HUE AND SATURATION REGULATING METHOD 失效
公开(公告)号：JP2001125557A
公开(公告)日：2001-05-11
申请号：JP30609299
申请日：1999-10-27
申请人： HITACHI LTD
发明人： SOMEYA RYUICHI , KABUTO NOBUAKI , MATONO TAKAAKI
IPC分类号： H04N9/64 , G09G5/02 , G09G5/06
摘要： PROBLEM TO BE SOLVED: To provide a technique capable of regulating hue and saturation for RGB input signals. SOLUTION: This device has a converting means for converting the RGB signals to the hue and saturation, a regulating means for regulating the hue and saturation after the conversion to desired values and a reverse converting means for converting the hue and saturation after the regulation reverse to the RGB.

25. 发明专利

JP2001054075A MOTION COMPENSATION SCANNING CONVERSION CIRCUIT FOR IMAGE SIGNAL 失效
公开(公告)号：JP2001054075A
公开(公告)日：2001-02-23
申请号：JP22343699
申请日：1999-08-06
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , MATONO TAKAAKI , TAKADA HARUKI , HASEGAWA TAKASHI , ISHIKURA KAZUO , SUGIYAMA MASAHITO , NAKAJIMA MITSUO , TSURU YASUTAKA
IPC分类号： H04N7/01 , H04N5/14
摘要： PROBLEM TO BE SOLVED: To obtain a scanning conversion circuit of a motion compensation type with high image quality at a low cost by conducting signal processing to adaptively change a threshold of relative comparison in response to the number of times of re-retrieval processing. SOLUTION: A delay section 1 adjusts a time delay attended with signal processing. A double speed conversion section 5 receiving an output signal S2 of the section 1 and an interpolation signal S5 outputs an image signal S6 of sequential scanning. A motion vector detection section 6 receiving a luminance signal of the image signal S6 of the sequential scanning applies detection processing of a motion vector used for motion compensation processing and outputs motion vector MV by each pixel and the number of times TN for the re-retrieval processing. A setting section 7 that uses an input image signal S1, a luminance signal of an interpolation signal S4 of an MCIP section 3, the motion vector MV for each pixel and the number of times TN for the re-retrieval processing conducts verification processing of reliability of the motion compensation processing. Then the setting section 7 generates a control signal SL to select an interpolation signal of motion compensation type for a pixel with high reliability or the select an interpolation signal of an adaptive type for a pixel with low reliability.

26. 发明专利

JP2001022330A SIGNAL PROCESSOR AND DISPLAY DEVICE USING THE SAME 失效
公开(公告)号：JP2001022330A
公开(公告)日：2001-01-26
申请号：JP19004999
申请日：1999-07-05
申请人： HITACHI LTD
发明人： SAKAI TAKESHI , MATONO TAKAAKI , HASEGAWA AKIRA , TAKADA HARUKI , KIMURA KATSUNOBU , NAGATA TATSUO
IPC分类号： H04N5/66 , G09G5/00 , G09G5/36 , G09G5/391 , H04N7/01
摘要： PROBLEM TO BE SOLVED: To display a high quality video signal by performing a noninterlace conversion, and an interpolation expansion or an interpolation contraction in a display device by expanding or contracting an interlace type video signal through its interpolation in the vertical direction, and conversion of its vertical frequency. SOLUTION: A vertical frequency and a horizontal frequency of an inputted interlace system video signal are converted into desired vertical and horizontal frequencies of the video signal by field memory 11, and a field discrimination signal Faw synchronized with the vertical frequency of the above desired video signal from a field discrimination signal Fac, and the outputs of vertical coefficient generation circuits 6, 24 for generating different vertical coefficients to a specific field and the other field respectively are selectively supplied to a vertical filter circuit 12 for expanding a video in the vertical direction by the field discrimination signal Faw.

27. 发明专利

JPH11177940A IMAGE SIGNAL SYSTEM CONVERTER AND TELEVISION RECEIVER 失效
公开(公告)号：JPH11177940A
公开(公告)日：1999-07-02
申请号：JP15559798
申请日：1998-06-04
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , ISHIKURA KAZUO , SUGIYAMA MASAHITO , NAKAJIMA MITSUO , TSURU YASUTAKA , MATONO TAKAAKI , KURITA TOSHIYUKI , TAKADA HARUKI , KANEYA TAKASHI , KIMURA HATSUJI
IPC分类号： H04N7/01
摘要： PROBLEM TO BE SOLVED: To realize a system converter with a small circuit scale and less image quality deterioration where the amount of arithmetic operation required for signal processing for motion correction is small. SOLUTION: An IP conversion section 1 converts an image signal S1 of interlaced scanning into a image signal S2 of progressive scanning. A block unit motion vector retrieval section 5 retrieves a block unit motion vector based on the image signal S2 of progressive scanning. A pixel unit motion vector generating section 6 assigns a motion vector with a minimum motion correction error obtained in the unit of mini blocks as a pixel unit motion vector, while a motion correction interpolation frame generating section 7 uses the pixel unit motion vector to generate an interpolation frame of the image signal and provides an output of an image signal series S4 of progressive scanning.

28. 发明专利

JPH11112939A IMAGE SIGNAL SYSTEM CONVERSION METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JPH11112939A
公开(公告)日：1999-04-23
申请号：JP29030797
申请日：1997-10-07
申请人： HITACHI LTD
发明人： HIRANO YASUHIRO , ISHIKURA KAZUO , SUGIYAMA MASAHITO , NAKAJIMA MITSUO , KURITA TOSHIYUKI , MATONO TAKAAKI , TAKADA HARUKI
IPC分类号： H04N7/01 , H04N7/36 , H04N7/46
摘要： PROBLEM TO BE SOLVED: To provide a method and device for converting an image signal system having high image quality at low cost by which image quality deterioration is suppressed with a simple signal processing. SOLUTION: A block unit motion vector retrieval section 5 in a motion correction frame number conversion section 2 detects a motion vector BV, and a pixel unit motion vector generating section 6 generates a motion vector PV in the unit of pixels in units of mini blocks. A motion correction vector generating section 10 generates a correction vector based on the PV, and current and preceding frame motion correction signal generating sections 8, 9 respectively generate motion correction signals. A motion correction signal setting section 11 generates a mean value of the both, when a difference component of the absolute values of both the motion correction signals is less than a threshold level, generates an interpolation frame signal with a frame signal closer to an interpolation frame by a temporal distance, when the component is more than the threshold level and outputs a signal S4 whose frame number has been converted.

29. 发明专利

JPH10191277A IDENTIFICATION CONTROL SIGNAL DECODING CIRCUIT AND TELEVISION DEVICE 失效
公开(公告)号：JPH10191277A
公开(公告)日：1998-07-21
申请号：JP34774296
申请日：1996-12-26
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： MIZUGUCHI TAKAHIRO , MATONO TAKAAKI , HASEGAWA AKIRA , OKADA KOJI
IPC分类号： H04N7/015 , H04N7/08 , H04N7/081
摘要： PROBLEM TO BE SOLVED: To reduce influence that noise and the fluctuation of a modulation degree in an input signal give on detection and to highly precisely detect the identification control signal in an NRZ system and a carrier system. SOLUTION: The identification control signal in the NRZ system is detected by using a luminance signal separated by a three-dimensional Y/C separation circuit 2, and the identification control signal of the carrier system is detected by using a chrominance signal whose signal level is optimized in an ACC circuit. The luminance signal extracted in the three-dimensional Y/C separation circuit 2 is used for detecting the identification control signal in the NRZ system. Thus, detection is highly precisely executed even if noise is added to an input signal. Even if the modulation degree of the input signal fluctuates highly precise detection is executed by using the chrominance signal processed in the ACC circuit 6 for the detection of the identification signal in the carrier system.

30. 发明专利

JPH09182105A COLOR REPRODUCTION DEVICE 失效
公开(公告)号：JPH09182105A
公开(公告)日：1997-07-11
申请号：JP33697795
申请日：1995-12-25
申请人： HITACHI LTD , HITACHI VIDEO IND INF SYST INC
发明人： SAKAI TAKESHI , MATONO TAKAAKI , NAGATA TATSUO , HASEGAWA AKIRA , SUDO KOICHI , MATSUKAWA MASAAKI
IPC分类号： H04N9/64 , H04N9/67
摘要： PROBLEM TO BE SOLVED: To form a desired signal in a small circuit scale and with simple operation and control from a luminance signal and a chrominance signal. SOLUTION: The luminance signals Y from an input terminal 1 are multiplied by coefficients a1 , a2 and a3 in multipliers 16, 17 and 18, and are supplied to adders 25, 26 and 27. Chromaticity signals I from an input terminal 2 are multiplied by a4 , a5 and a6 in multipliers 19, 20 and 21 and are supplied to the adders 25, 26 and 27. Chromaticity signals Q from an input terminal 3 are multiplied by coefficients a7 , a8 and a9 in multipliers 22, 23 and 24 and are supplied to the adders 25, 26 and 27. The coefficients a1 -a9 of the multipliers 16-24 can be switched in accordance with a control signal from a control terminal 15. The luminance signals Y, two color difference signals B-Y and R-Y or three primary color signals G, B and R can be obtained in output terminals 28, 29 and 30 in accordance with such switching.

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