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1. 发明专利

JPS6331388A LUMINANCE SIGNAL/CHROMINANCE SIGNAL SEPARATING DEVICE 失效
公开(公告)号：JPS6331388A
公开(公告)日：1988-02-10
申请号：JP17590386
申请日：1986-07-25
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78
摘要： PURPOSE:To suppress the occurrence of dot disturbance and crosscolor by substituting separated luminance signal and chrominance signal on a boundary part with interpolating values if a sample point to be noticed has not correlations to nearby sample points. CONSTITUTION:A video signal is delayed by one-horizontal period delaying devices 2 and 3, and filter circuits 4-6 separate the video signal into a low-band video signal consisting of only a low-band luminance signal and a high-band video signal including a high-band luminance signal and a carrier chrominance signal. A correlation deciding circuit 10 outputs the signal indicating which of the non-delayed signal and the output from the delay device 3 the output from the delay device 2 have closer correlations to, and the separated carrier chrominance signal is selected and outputted in accordance with the output from a threshold circuit 12 by a switching circuit 11. A differentiating circuit 13 secondarily differentiates the low-band video signal from filter circuits 4-6 to extract the of contour a pattern. Interpolating circuits 16 and 17 substitute separated luminance signal and carrier chrominance signal with interpolating values obtained from preceding and following values, where degradation does not occur, in accordance with the output of AND circuit 15 if the noticed sample point is on the contour part of the pattern and has not correlations in the vertical direction.

2. 发明专利

JPS61159891A DEVICE FOR SEPARATING LUMINANCE SIGNALS AND CHROMINANCE SIGNALS 失效
公开(公告)号：JPS61159891A
公开(公告)日：1986-07-19
申请号：JP62185
申请日：1985-01-07
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA , IDE AKIFUMI
IPC分类号： H04N9/78
摘要： PURPOSE:To reduce the effect of the noise to a picture surface by separating luminance signals and chrominance signals from each other so as to be in keeping with human visual sense by providing proper weighting to the correlated values with near-by pixels and by adjudging the correlation in consideration of the hystory of an already determined correlation. CONSTITUTION:High band video signals are supplied to a terminal 1 and the correlated values of the luminance the chrominance signal with near-by pixels are computed in correlated value computing circuits 2-9. The correlated values between the luminance and the chrominance signals are weighted at a multiplier 10 so as to fit to the human visual sense. Further the weighting is effected among the output of the correlated value computing circuit in accordance with the position of the picture element thereof. As to these correlated values, the information concerning the picture element position that gives the smallest value of the sum of the correlated values of the laminance and the chrominance signals is outputted at a correlation and noise discriminating circuit 11. The least correlated value already discriminated is stored in a memory 12 and the mean value is calculated in an aveaging circuit 26. When the least correlated value discriminated by the circuit 11 is remarkably different from the input from the averaging circuit 26, a judgment is given as the contamination of noise. The average of the whole outputs of the comb line filters 13 to 22 is calculated and outputted at a switching and averaging circuit 21.

3. 发明专利

JPS6367891A LUMINANCE SIGNAL/CHROMINANCE SIGNAL SEPARATING DEVICE 失效
公开(公告)号：JPS6367891A
公开(公告)日：1988-03-26
申请号：JP21226786
申请日：1986-09-09
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78
摘要： PURPOSE:To also decide the correlation of signals separating by one frame by a correlation deciding system in which the signals separated by two frames are used, by processing the output signals of plural correlation decision circuits by a pattern decision circuit. CONSTITUTION:The titled device is equipped with frame memories 2-4 which delay composite video signal by one frame period, the correlation decision circuits 18 and 20 which decide the correlation between the signals separating by two frames, a third correlation decision circuit 19 which decides the correlation among the signals continuing in three frames, a frame memory which delays the output signal of the correlation decision circuit 20, and the pattern decision circuit 23 which decides the correlation between the signal remarked by the outputs of the correlation decision circuits 18-20, and the output of the frame memory, and the signals at preceding and succeeding frames. In a case that the signal levels of continuous frames increases or decreases uniformly, and a case that the correlation between a remarked frame and the preceding and succeeding frames is recognized, but no correlation between the preceding and the succeeding frames is recognized, the correlation is decided by the correlation decision circuit 19, and the outputs of a plural chrominance signals separation circuit is switched by a decided result.

4. 发明专利

JPS62242489A CLOCK SIGNAL GENERATING DEVICE 失效
公开(公告)号：JPS62242489A
公开(公告)日：1987-10-23
申请号：JP8646886
申请日：1986-04-15
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： IDE AKIFUMI , YAMAMITSU CHOJURO , NISHIKIORI YOSHIHISA
IPC分类号： H04N9/44 , H04N9/45 , H04N11/04
摘要： PURPOSE:To easily and highly accurately generate a clock signal with 4 times frequency of a color carrier signal and a clock signal with 858 times frequency of a horizontally synchronizing signal by combining a PLL circuit with a hetrodyne circuit. CONSTITUTION:A voltage control oscillator 9 constituting the 1st PLL circuit 2 oscillates 8 times frequency 8fsc synchronizing with a color carrier signal (fsc) applied to an input terminal 1. The output signal 8fsc of the oscillator 9 is divided into 1/35 frequency by a 1/35 frequency divider 3 and inputted to the band filter 14 of the 1st heterodyne circuit 4. On the other hand, a signal 4fsc obtained by dividing the output signal of the oscillator 9 into 1/2 frequency by an 1/2 frequency divider 10 is outputted to a terminal 5 and also inputted to the band filter 13 of the circuit 4. A multiplier in the circuit 4 multiplies the output signals of respective filters 13, 14, generates 858fsc frequency and outputs the signal to an output terminal 6.

5. 发明专利

JPS60219886A DEVICE FOR SEPARATING LUMINANCE SIGNAL FROM CARRIER CHROMINANCE SIGNAL 失效
公开(公告)号：JPS60219886A
公开(公告)日：1985-11-02
申请号：JP7604984
申请日：1984-04-16
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78
摘要： PURPOSE:To obtain a separator for preventing the occurence of cross colors and shading of profiles even when the vertical correlation of a luminance signal drops by separating the luminance signal from a carrier chrominance signal with the aid of the vertical correlation of signals ahead of one horizontal period. CONSTITUTION:A color video signal (YL+YH+C) is supplied to a terminal 9, while a high-frequency color video signal (YH+C) is filtered by a high-pass filter 10 and supplied to a comb-shaped filter 12. A high-frequency luminance signal YH' and a carrier chrominance signal C' are fetched from a signal Sc and a signal Sa, respectively. Unnecessary luminance signal are mixed on an (n+2)th line without the vertical correlation of the signal Sa(C'), fetched by a subcarrier half- period delay circuit 13 and an adder 14, and supplied to a logic arithmetic circuit 15 together with the signal Sc. Accordingly the proper high-frequency luminance signal whose unnecessary luminance signals are removed can be outputted from the logic arithmetic circuit 15.

6. 发明专利

JPS62219891A SEPARATING DEVICE FOR LUMINANCE SIGNAL AND CHROMINANCE SIGNAL 失效
公开(公告)号：JPS62219891A
公开(公告)日：1987-09-28
申请号：JP6229986
申请日：1986-03-20
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA , IDE AKIFUMI
IPC分类号： H04N9/78
摘要： PURPOSE:To separate a luminance signal from chrominance signal which have less occurrences of dot disturbance and clock color by judging a nearby sample point having the strongest interrelation with an observed sample point and providing an interrelation judging circuit that outputs a number indicating the position and a smoothing circuit that smoothes the number outputted from the interrelation judging circuit. CONSTITUTION:Signals for 3 horizontal lines are prepared in 3H.Delay 3, and an (l-1) line signal is outputted to a signal line 5, an (l) line signal is outputted to a signal line 6 and an (l+1) line signal is outputted to a signal line 7. An interrelation judging circuit 8 judges which is stronger interrelation between sample points of (l) line and (l-1) line and between sample points of (l) line and (l+1) line and outputs the result. The smoothing circuit 11 outputs a number only when the number indicating position of sample points outputted by the interrelation judging circuit is the same number continuously for more than a certain period. In the case where the continuation of the same number is less than the period, outputting is not made since the number is due to erroneous judgment, and a number outputted immediate before is outputted.

7. 发明专利

JPS61269486A LUMINANCE SIGNAL AND COLOR SIGNAL SEPARATING DEVICE 失效
公开(公告)号：JPS61269486A
公开(公告)日：1986-11-28
申请号：JP11014385
申请日：1985-05-24
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78
摘要： PURPOSE:To attain decision on correlation suitable to visual characteristics of human eyes by computing independently and weighting properly the correlative values of a high-frequency luminance signal and a color signal and then deciding the correlative values. CONSTITUTION:A composite video signal (YL+YH+C) sampled by an even multiple of a subcarrier is supplied to a terminal 1 and a high frequency video signal (YL+C) is passed through a high-pass filter 2. The output ESO of an arithmetic circuit O and the output ESk of an arithmetic circuit (k) are supplied to a correlation circuit l, which calculates the correlative value PES1 of the color signal and the correlative value DES1 of the luminance signal. Further, the correlative values PES1 and DES1 are weighted on the basis of the difference between brightness based upon visual characteristics of human beings and the sensitivity of colors. Then, a correlation and noise deciding circuit 17 selects the smallest value among outputs of respective correlation circuits l1-n which are weighted by a multiplying circuit 12 and the number code l of the picture element Gl is outputted to a switch circuit 20.

8. 发明专利

JPS6194487A Video signal vertical horizontal correlation value arithmetic circuit 失效
标题翻译：视频信号垂直水平相关值算术电路
公开(公告)号：JPS6194487A
公开(公告)日：1986-05-13
申请号：JP21540484
申请日：1984-10-15
申请人： Matsushita Electric Ind Co Ltd
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78 , H04N11/04
摘要： PURPOSE: To minimize a time interval of the data for calculation and to calculate a precise correlation quantity by using respectively the data separated for a half period of a subcarrier wave in the horizontal direction and for one horizontal period in the vertical direction and calculating a correlation quantity.
CONSTITUTION: Chrominance components vertical correlation value arithmetic parts 11∼38, luminance signal vertical correlation value arithmetic parts 24∼39, chrominance components horizontal correlation value arithmetic parts 13∼37 and luminance signal horizontal correlation value arithmetic parts 31∼40 are provided. The average value of the sample value separated for a half period of the subcarrier wave of a composite video signal which is sampled at the frequency of the even number of times of the subcarrier wave synchronized with the burst signal, is calculated, a vertical correlation value of the luminance signal is obtained by using two values separated for one period of the average value, and a horizontal correlation value of a luminance signal is obtained by using two sample values separated for a half period of the subcarrier wave of the average value is obtained. Further, the difference between two samples are calculated and a vertical correlation value and a horizontal correlation value of the chrominance components are calculated.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：为了最小化用于计算的数据的时间间隔，并且通过分别使用在水平方向上的子载波波的半个周期和在垂直方向上的一个水平周期中分离的数据来计算精确的相关量，并且计算相关性数量。构成：提供色度分量垂直相关值算术部分11-38，亮度信号垂直相关值算术部分24-39，色度分量水平相关值算术部分13-37和亮度信号水平相关值运算部分31-40。计算以与突发信号同步的子载波波的偶数次频率采样的复合视频信号的子载波波的半个周期分离的采样值的平均值，垂直相关值通过使用在平均值的一个周期中分离的两个值来获得亮度信号，并且通过使用为平均值的子载波波的半个周期分离的两个采样值来获得亮度信号的水平相关值。此外，计算两个样本之间的差异，并且计算色度分量的垂直相关值和水平相关值。

9. 发明专利

JPS6194415A Digitizing device for video signal 失效
标题翻译：用于视频信号的数字设备
公开(公告)号：JPS6194415A
公开(公告)日：1986-05-13
申请号：JP21540584
申请日：1984-10-15
申请人： Matsushita Electric Ind Co Ltd
发明人： IDE AKIFUMI , NISHIKIORI YOSHIHISA
IPC分类号： H03M1/10 , H04N19/00
摘要： PURPOSE: To obtain a digital output with high quality by controlling an A/D converter with a clock signal which synchronizes with a burst signal accurately and controlling an input signal with a signal obtained by detecting a level error detected on the basis of a reference level.
CONSTITUTION: An analog signal 10 is converted by an A/D converter 12 into a digital signal and pattern-detected 22 with the pattern of a synchronizing signal part, and the output is applied to a gating device 13. This gating device 13 sends the output of the circuit 12 to a BPF14 and a level detector 19 only during a burst period. A burst signal component passed through the BPF14 has a phase difference detecting 15 and is D/A-converted 16 and passed through an LPF17 to control a voltage-controlled oscillator 18, thereby sending a clock signal to the circuit 12. The level error is detected 20 from the level of the pedestal part detected by a detector 19 and the reference level and converted 21 into a digital signal, which is subtracted 11 from the signal 10. Consequently, a digital video signal with high quality whose phase and level are controlled is outputted 23 from the circuit 12.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过控制具有与脉冲信号同步的时钟信号的A / D转换器获得高质量的数字输出，并通过检测基于参考电平检测到的电平误差而获得的信号来控制输入信号。构成：模拟信号10由A / D转换器12转换成具有同步信号部分的图形的数字信号和图案检测的22，并且输出被施加到门控装置13.该选通装置13发送仅在突发周期期间将电路12输出到BPF14和电平检测器19。通过BPF14的脉冲串信号分量具有相位差检测15，并经过D / A转换16并通过LPF17以控制压控振荡器18，从而向电路12发送时钟信号。电平误差为从检测器19检测到的基座部分的电平检测出20个基准电平并将其转换为数字信号，该数字信号从信号10中减去11个。因此，具有高质量的数字视频信号，其相位和电平被控制从电路12输出23。

10. 发明专利

JPS6315587A PAL LUMINANCE SIGNAL AND CHROMINANCE SIGNAL SEPARATING DEVICE 失效
公开(公告)号：JPS6315587A
公开(公告)日：1988-01-22
申请号：JP16002386
申请日：1986-07-08
申请人： MATSUSHITA ELECTRIC IND CO LTD
发明人： NISHIKIORI YOSHIHISA
IPC分类号： H04N9/78
摘要： PURPOSE:To prevent the degradation of a video signal due to erroneous decision and the increase of the hardwave scale by deciding the correlativity between a sample point to be noticed and a sample point apart by a maximum of one horizontal line period distant from said sample point by a correlativity deciding circuit and smoothing the output from the correlativity deciding circuit in a smoothing circuit. CONSTITUTION:The variance of a color signal before and after one horizontal line period in the vertical direction of the sample point to be noticed is checked by adders 15, 19, and 16. The variance of the color signal at sample points before and after tau=1/4FSC period in the horizontal direction of the sample point to be noticed is checked by an adder 18. Values obtained by weighting absolute values of these variations are used to decide higher one of the correlativity in the vertical direction and the correlativity in the horizontal direction by a correlativity deciding circuit 23 and a smoothing circuit 28. Sample points which are apart only by one horizontal line period from the sample point to be noticed in the horizontal direction and the vertical direction are used to separate a high-band luminance signal by adders 17 and 29. These high-band luminance signal components are selected by a switch circuit 26 based on the correlativity decision result.

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