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公开(公告)号：JPS57111176A
公开(公告)日：1982-07-10
申请号：JP18930080
申请日：1980-12-26
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI , TANAKA YUTAKA
Abstract: PURPOSE:To avoid the deterioration of the vertical image resolution and to eliminate the flicker on a character screen, by giving a substantial H/2 delay to the scanning line in an odd field compared with a scanning line in an even field. CONSTITUTION:A video signal S given from the preceding stage is applied to a contact (a) of a switch circuit 3, a character decoder 4 and a synchronous separating circuit 5. The signal S is sampled when the character signal is received at the circuit 4, and a character signal SA is applied to a contact (b) of the circuit 3. The signal S or SA given from the circuit 3 is switched through a switch circuit 8 of a double scanning frequency converting circuit 7, and the output is applied alternately to a 1H memories 10 and 11. At the same time, the signal read in a double speed as high as the writing out of a switch circuit 9 plus the signal delayed by H/2 through an H/2 memory 12 are applied to the contacts (a) and (b) of the circuit 13. Then the circuit 13 is switched by a signal ID given from a control circuit 6 based on the horizontal and vertical synchronous signals HD and VD to discriminate an odd or even scanning field. Then the signals corresponding to each field are applied to a CRT14.
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公开(公告)号：JPS5787229A
公开(公告)日：1982-05-31
申请号：JP16217880
申请日：1980-11-18
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI
Abstract: PURPOSE:To compensate the transfer characterstic to obtain an accurate filter characteristic, by cascading plural variable delay circuits and by comparing an output, which is obtained by synthesizing their outputs, with an input and by feeding back the comparison result as a delay time control signal. CONSTITUTION:The color video signal from a terminal T1 is delayed by delay circuits DL1-DLn successively and is supplied to a synthesizing circuit 1, and a luminance signal and a chrominance signal are taken out to terminals T4 and T5, respectively. Outputs of respective delay circuits are supplied to a synthesizing circuit 11 and becomes a signal of a prescribed phase characteristic and is supplied to a comparing circuit 12 and is compared in phase with the color video signal, and the comparison output in the burst time is supplied to an integrating circuit 14 through a gate circuit 13. A DC voltage which changes the polarity and the level in accordance with the phase of the burst signal is generated from the circuit 14 and is fed back together with a bias voltage 15 to a transistor Q4 of each delay circuit, and the delay time is controlled to separate the luminance signal and the chrominance signal surely. Since the delay characteristic is controlled on a basis of the burst signal, the characteristic of the filter is accurate even for temperature variance.
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公开(公告)号：JPS5742287A
公开(公告)日：1982-03-09
申请号：JP11885780
申请日：1980-08-28
Applicant: Sony Corp
Inventor： OKADA TAKAFUMI , TANAKA YUTAKA
IPC: H04N9/78
CPC classification number: H04N9/78
Abstract: PURPOSE:To reject dot interference produced at a vertical non-correlation section surely and to improve the video quality through preventing deterioration of luminance component, by providing a separation circuit separating the luminance circuit not including a carrier chrominance signal. CONSTITUTION:A separation circuit 30 where a signal with smaller amplitude is not outputted when a pair of signals with equal polarity are inputted, is provided and a color video signal Si is inputted to a terminal 1 of the circuit 30. A high frequency color video signal Sa is separated at an HPF2 from this signal Si, and it is synthesized with the signal Si at a synthesizer 4 based on the signal Sa, and a low frequency luminance signal YL is separated and applied to a synthesizer 23. The signal Sa is delayed by 1H at a 1H delay circuit 21, a 1H delay signal Sb and the signal Sa are applied to an amplitude correlation device 20, a luminance signal Sd not including carrier chrominance signal is outputted from the device 20 and added to a synthesizer 23, and a luminance signal YW with broad band not including the carrier chrominance signal is outputted from the synthesizer 23 to prevent the deterioration of the luminance signal.
Abstract translation: 目的：通过提供分离不包括载波色度信号的亮度电路的分离电路，来抵消在垂直非相关部分产生的点干扰并且通过防止亮度分量的劣化来提高视频质量。 构成：当输入具有相等极性的一对信号时，不输出具有较小振幅的信号的分离电路30，并且彩色视频信号Si被输入到电路30的端子1.高频彩色视频 信号Sa在HPF2处与该信号Si分离，并且基于信号Sa在合成器4处与信号Si合成，并且将低频亮度信号YL分离并施加到合成器23.信号Sa是 在1H延迟电路21延迟1H，1H延迟信号Sb和信号Sa被施加到幅度相关器件20，从器件20输出不包括载波色度信号的亮度信号Sd并将其加到合成器23， 并且从合成器23输出不包括载波色度信号的宽带的亮度信号YW，以防止亮度信号的劣化。
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公开(公告)号：JPS56161712A
公开(公告)日：1981-12-12
申请号：JP6575080
申请日：1980-05-17
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI , ISOBE TOSHINOBU , KAWAMATA MITSUO
Abstract: PURPOSE:To constitute a filter suitable for circuit integration, by using a variable gain amplifier and a capacitor. CONSTITUTION:When a signal is fed to the base of a transistor (TR)Q1, this signal is amplified differentially by TRs Q1, Q2 in an amplifier 2 and picked up at the emitter of a (TR)Q9 after being amplified differentially by TRs Q6, Q7. A capacitor C1 is in parallel connection between the input and output terminals of the amplifier 2, and according to the Miller's effect by the capacitor C1, a capacitance C viewing the amplifier 2 from a resistor R1 is C=C1A1, if the naked gain of the amplifier 2 is taken as A1. Thus, this circuit operates like an LPF, and the output of the LPF is picked up at terminal T2. Further, the cutoff frequency fC of the output of the LPF is fC=1/2piC1A1R1. Even if the value of the resistor R1 is in variance, the cutoff frequency fC can be compensated by changing the gain A1 of the amplifier 2 toward reverse direction, through the change in the collector current of a (TR)Q3.
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公开(公告)号：JPS5671312A
公开(公告)日：1981-06-13
申请号：JP14809079
申请日：1979-11-15
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI
Abstract: PURPOSE:To make highly accurate the circuit, by selecting each emitter area of four transistors in a current Miller circuit to a suitable ratio so that the current transmission ratio can be almost to a specific value. CONSTITUTION:Each emitter of transistors (TR) Q1, Q2 is grounded, the collector of Q1 is connected to the power supply +B through a current source circuit 1 of an input current I1 and the collector is connected to the base of Q2. The collector of a TRQ3 is connected to the power supply +B and the emitter is connected to the collector and base of a TRQ4 and the base of a TRQ6. The collector of Q2 is connected to an output terminal 2 to obtain the output current I2 and the base of a TRQ5. The collector of Q5 is connected to the power supply +B and connected to the collector of the TRQ6. Each emitter of Q4, Q6 is connected to each base of Q1, Q2. In such a circuit, each emitter area (or number of emitters) ratio is selected as 1:n:p:np for Q1, Q2, Q4 and Q6 to make the current transmission ratio I2/I1 as almost (n).
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Patent Agency Ranking
公开(公告)号：JPS55149589A
公开(公告)日：1980-11-20
申请号：JP5736979
申请日：1979-05-10
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI , TANAKA YUTAKA , MATSUZAKI ATSUSHI , ISOBE TOSHINOBU
Abstract: PURPOSE:To increase the color resolution by high band correction of color signal with the high band luminance signal, when the luminance signal lower than a given level of low band color difference signal is input. CONSTITUTION:The narrow band color difference signal from the terminal 1 is made to low band color difference signal via the filter 2 and fed to the gates 15, 16. Futher, the luminance signal via the amplifier 18 and the low band luminance signal via the filter 19 are fed to the gates 15, 16. The gates 15, 16 output lower level input signal and the output signal is fed to the subtractor 20 to be correction use high band luminance signal. This luminance signal is fed to the adder 8 together with the low band color difference signal, and the adder 8 outputs the color difference signal compensating the high band characteristics. The luminance signal level to correct the color difference signal is arbitrarily set with the adjustment of the amplification factor of the amplifier 18.
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公开(公告)号：JPS55102926A
公开(公告)日：1980-08-06
申请号：JP229580
申请日：1980-01-12
Applicant: SONY CORP
Inventor： OKADA TAKAFUMI , SUMIYA HIROYUKI , IMAYASU TOMONARI , NIIMURA TSUTOMU
IPC: H03K4/50 , H03K3/0231 , H03K4/501 , H03K4/502
Abstract: PURPOSE:To keep saw-tooth wave amplitude constant by supplying a synchronizing signal, whose peak value is within a fixed-value range, to the base of a transistor whose collector and emitter are connected to the collector and emitter of one transistor constitution a differential amplifier. CONSTITUTION:Transistor Trs Q1 and Q2 constitute a differential amplifier, current switch Q4 synchronizing with current switch Q3 is provided to the base of TrQ2, and a reference voltage generating circuit generates 1st and 2nd reference voltages by switch Q4. Here, switches Q3 and Q4 are controlled by the output of the differential amplifier to obtain a saw-tooth wave output from capacitor 20. Further, TrQ5 whose collector and emitter are connected to the collector and emitter of TrQ2 is provided and to the base of TrQ5, a synchronizing signal whose peak value is between the 1st and 2nd reference voltage is applied so as to alternate the charging and discharging of capacitor 20, thereby holding saw-tooth wave amplitude constant.
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公开(公告)号：JPS5591074A
公开(公告)日：1980-07-10
申请号：JP16517878
申请日：1978-12-28
Applicant: SONY CORP
Inventor： ISHIGAKI YOSHIO , OKADA TAKAFUMI , MATSUZAKI ATSUSHI
IPC: G06G7/163
Abstract: PURPOSE:To realize a simple-structure divider circuit which can perform the division process regardless of the plus or minus of two signals and also features a large dynamic range and gain. CONSTITUTION:Current source 31 of 1st current i1 corresponding to 1st signal e1 is connected to the emitter of transistor Q29 as well as to the base of emitter Q30 of absolute value circuit 23. And absolute value current ¦i1¦ flows to output terminal 23a regardless of the plus or minus of current i1. Constant current source 29 is provided to reciprocal number circuit 22 to supply Ia, and I a/¦i1¦ flows to output terminal 22a. Differential amplifier circuit 27 consisting of differential TrQ24, Q25 and Q26 is installed to polarity decision circuit 21 along with differential amplifier circuit 26 comprising differential TrQ21 and Q22 plus current source TrQ23. Then the polarity decision result of signal e1 is multiplied by 2nd signal e2 and signal I a/¦i1¦ of terminal 22a, and Iout=K.e2/e1 is delivered to output terminal 4 (K: constant).
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公开(公告)号：JPS5511609A
公开(公告)日：1980-01-26
申请号：JP8372278
申请日：1978-07-10
Applicant: SONY CORP
Inventor： TADA MASAHIRO , ISHIGAKI YOSHIO , OKADA TAKAFUMI , OOMORI SHIYOUJI
IPC: H04N9/68
Abstract: PURPOSE:To obtain the control signals to the correction signals which are used to correct the chrominance signals through a simple constitution by clamping both the integration output of the luminance signal's higher band component and the differential output of the lower band component to the 1st and 2nd potential and then comparing the both clamp output with each other. CONSTITUTION:For composite color video signal SO supplied to terminal 41, only luminance signal Y is extracted after trapping 42 of the carrier chrominance signal and then isolated 43 and sliced 44 to form luminace signal YC. After this, signals YC pass through delay circuit 45 to be compounded 48 via LPF (cut-off frequency: about 350K Hz) 46 and delay circuit 47 to obtain high-band signal YH as well as to obtain clamp output f¦YH¦dt through integrating capacitor C, clamp circuit 52 and others. On the other hand, signal YC is turned to narrow-band signal YLL through LPF (cut-off frequency: about 175K Hz) to obtain clamp output YLL' through differential circuit 54, clamp circuit 57 and others. This clamp output is then applied to comparator 58 along with output f¦YH¦dt. Thus, control signal XB to the correction signal for improvement of the frequency characteristics of the chrominance signal is obtained.
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公开(公告)号：JPS558183A
公开(公告)日：1980-01-21
申请号：JP8178878
申请日：1978-07-05
Applicant: SONY CORP
Inventor： ISHIGAKI YOSHIO , OKADA TAKAFUMI , OOMORI SHIYOUJI , TSUCHIYA TAKAHISA
Abstract: PURPOSE:To improve the space frequency of the color difference signal by providing the LPF featuring a lower cut-off frequency than the LPF which deletes the high- band signal of the luminance signal and then detecting the variation quantity of amplitude from the low-band signal drawn out of the LPF. CONSTITUTION:The following LPF's are provided to each input signal: LPF16 to separate luminance signal YH into low-band signal YL and high-band signal YH; LPF11R, 11B and 11G to match the characteristics corresponding to LPF16; and LPF2 featuring a lower cut-off frequency than these LPF's. The output of LPF2 of each luminance and color signals is supplied to differential circuits 9, 12R, 12B and 12G each to obtain the variation amount of the amplitude. Then ratio SD is obtained through dividers 10R, 10B and 10G between the variation amount of the color difference signal and variation amount YLL of the luminance signal. This result is then multiplied by signal YH via multipliers 13R, 13B and 13G to deliver correction signals SPR, SPG and SPG each. These correction signals are compounded with the output of LPF1 of the color difference signal through compounding units 14R, 14B and 14G each, and then supplied to matrix circuit 5 to produce primary color signals R, B and G respectively.
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