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公开(公告)号：JPH0292011A
公开(公告)日：1990-03-30
申请号：JP24334588
申请日：1988-09-28
Applicant: SONY CORP
Inventor： TSUNETOMI YOSHINOBU , KAWABUCHI SEIJI , TOKUHARA MASAHARU , SARUGAKU TOSHIO , NAITO HIDEFUMI
Abstract: PURPOSE:To improve the picture quality of a receiver by using a horizontal synchronizing signal so as to control a switching means thereby preventing the production of an automatic frequency control error signal. CONSTITUTION:An automatic frequency control AFC error signal 15a is a voltage component being a true AFC error signal when the frequency of a horizontal synchronizing signal HSYNC 12 gets higher (or lower). A switch circuit 3 is provided to the post-stage of an LPF 2 so as to be turned off in a way that an AFC error signal 15 is not supplied to a VCO 4 for a period being a width tau1 synchronously with the HSYNC 12 fed to a comparator circuit 1. Since no AFC error voltage 15 is generated entirely when the frequency of the HSYNC 12 is stable, the position shift caused in a pattern in a direction orthogonal to the horizontal scanning line is eliminated thereby improving the picture quality.
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公开(公告)号：JPH0234092A
公开(公告)日：1990-02-05
申请号：JP18516988
申请日：1988-07-25
Applicant: SONY CORP
Inventor： MOTOE HISASHI , KAWASHIMA HIROYUKI , TOKUHARA MASAHARU
IPC: H04N7/01
Abstract: PURPOSE:To improve picture quality by converting a movement detection signal from a movement detection means into 1-bit signal by a level comparison means and supplying the result to a coefficient generator of integration type constitution so as to generate a coefficient. CONSTITUTION:A movement detection signal from a movement detection means 50 is converted into a 1-bit signal by a level comparison means 52 and fed to an integration type constitution coefficient generator 51 comprising D flip- flops 511a-511h, an adder 512 and a decoder 513 to generate a coefficient. Thus, an excellent coefficient corresponding to the movement is generated.
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公开(公告)号：JPH0234091A
公开(公告)日：1990-02-05
申请号：JP18516888
申请日：1988-07-25
Applicant: SONY CORP
Inventor： MOTOE HISASHI , KAWASHIMA HIROYUKI , TOKUHARA MASAHARU
IPC: H04N7/01
Abstract: PURPOSE:To obtain a signal expanded with an arithmetic bit number with less memory capacity by converting a movement detection signal from a movement detection means into 1-bit signal by a level comparison means and constituting a time base filter by one-bit processing. CONSTITUTION:A movement detection signal from a movement detection means 50 is converted into a 1-bit signal by a level comparison means 52 and the time filter 53 consists of 1-bit processing. Thus, the signal expanded in the time direction is obtained by the arithmetic bit number with less memory capacity. Moreover, a coefficient generator 51 consists of flip-flops 511a-511h, an adder 512 and a decoder 513 and is constituted as an integration type, an excellent coefficient corresponding to the movement is generated.
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公开(公告)号：JPS63121366A
公开(公告)日：1988-05-25
申请号：JP26726186
申请日：1986-11-10
Applicant: SONY CORP
Inventor： SARUGAKU TOSHIO , TOKUHARA MASAHARU
Abstract: PURPOSE:To control the luminance and the contrast of an auxiliary picture independent of a main picture by detecting the beam current value of an image receiving tube, controlling the level of a main video signal, detecting the mean luminance level of an auxiliary video signal and controlling the level of the auxiliary video signal. CONSTITUTION:A main screen from a main TV circuit MK is projected on the whole tube surface of the image receiving tube 18, and an auxiliary screen from an auxiliary TV circuit SK is projected in the main screen. A beam current detection circuit 31 detects the current value of a beam current supplied from a deflection/voltage circuit 26 to the image receiving tube 18. The output from the circuit 31 is supplied to a main video/chrominance components circuit 8M, and the level of the main video signal is controlled. A luminance signal Y from a matrix circuit 14 is supplied to a level detection circuit 33, and the mean level is detected. The output from the circuit 33 is supplied to a gain control amplifier 32. Thus, the luminance and the contrast of the auxiliary picture can be controlled independent of the main picture.
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公开(公告)号：JPS6147029B2
公开(公告)日：1986-10-17
申请号：JP3196483
申请日：1983-02-28
Applicant: SONY CORP
Inventor： YAMADA HISAFUMI , TOKUHARA MASAHARU , KURIKI CHOEI
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Patent Agency Ranking
公开(公告)号：JPS61137481A
公开(公告)日：1986-06-25
申请号：JP25892284
申请日：1984-12-07
Applicant: Sony Corp
Inventor： KITA HIROYUKI , KAWASHIMA HIROYUKI , TOKUHARA MASAHARU
Abstract: PURPOSE: To eliminate deterioration of S/N of a signal and to prevent a picture from becoming unnatural by clamping the blanking period of video signals to be A/D converted at a specified level and making the signal range of video signals included in the dynamic range of above-mentioned A/D conversion.
CONSTITUTION: When a signal of A in the figure and a blanking pulse of B in the figure are supplied to a reproducing circuit 3 from a YC processing circuit 2, the signal from the circuit 2 and the pedestal level are supplied respectively to the bases of Trs 31, 32 of the circuit 3. At the same time, the base of the Tr32 is grounded through a Tr33, and the blanking pulse is supplied to the base of the Tr33, and reproduction output is taken out from the junction of emitters of Tr31, 32. As output signals of the circuit 3 are as shown by the figure C, the possibility of deterioration of S/N of the signal becomes small when the maximum amplitude of the signal is brought within the dynamic range of an A/D converting circuit 4. As the pedestal level formed here is maintained to an output of a D/A converting circuit 6, the level is clamped at the black level of a receiving set 7, and the picture does not become unnatural.
COPYRIGHT: (C)1986,JPO&JapioAbstract translation: 目的：为了消除信号的S / N的恶化，并且通过将视频信号的消隐周期钳位为在指定电平进行A / D转换，并使视频信号的信号范围包括在动态中，防止图像变得不自然 上述A / D转换范围。 构成：当图中的A信号和图中B的消隐脉冲从YC处理电路2提供给再现电路3时，来自电路2的信号和基座电平分别提供给 同时，Tr32的基极通过Tr33接地，消隐脉冲提供给Tr33的基极，再现输出从 由于电路3的输出信号如图C所示，当信号的最大振幅达到A / D的动态范围时，信号的S / N的劣化的可能性变小 由于这里形成的基座电平保持在D / A转换电路6的输出端，所以电平被钳位在接收装置7的黑电平，图像不会变得不自然。
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公开(公告)号：JPS60186187A
公开(公告)日：1985-09-21
申请号：JP4233284
申请日：1984-03-05
Applicant: SONY CORP
Inventor： TOKUHARA MASAHARU , YAMAKI KAZUO , TAMURA TAKAHIKO
Abstract: PURPOSE:To omit a gain control circuit for picture control and simplify circuit constitution by using a gain control circuit which makes a white level adjustment even for picture control. CONSTITUTION:A picture control voltage obtained from a variable resistor 10 is converted by a voltage-current converting circuit 60 into a control current Ic, which is applied to multiplying circuits 62R, 62G, and 62B through a switch 61 and multiplied by gain control signals SWB, SWR, and SWB for white level adjustment. Gain control amplifiers 24R, 24G, and 24B are controlled with their multiplication outputs. Consequently, the signals SWR, SWG, and SWB are multiplied by the picture control current Ic while the switch 61 is on, so a white level adjustment is made while the ratio of SWR, SWG, and SWB is held, and picture control is also performed.
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公开(公告)号：JPS6075189A
公开(公告)日：1985-04-27
申请号：JP18352683
申请日：1983-09-30
Applicant: SONY CORP
Inventor： TOKUHARA MASAHARU , TAMURA TAKAHIKO , TOYODA NAOKUNI , KUEDA SHINJI
IPC: H04N9/73
Abstract: PURPOSE:To attain stable color temperature switching independently of variation of a black level of a chrominance signal by providing a level limit means to a prescribed path among signal paths through which R, G, G chrominance signals are applied. CONSTITUTION:The R, G, B signals from an integrated circuit 1 are synthesized respectively via resistors 8R, 8G, 8B and applied to a transistor (TR) 9 as a luminance signal Y. The TR9 is turned off at the horizontal blanking pulse period and a voltage depending on the luminance signal Y is obtained at a connecting point P1 in other periods. Then a voltage EV obtained at a connecting point P4 corresponds to the black level of the luminance signal Y, it is low when the black level is low and high when the black level is high. Thus, when the R and G signals from the integrated circuit 1 reaches to EV+VBE or over, since diodes 6R, 6G are conducted, an input level of a drive amplifier 3 is limited in response to the black level of the luminance signal and the color temperature is changed over.
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公开(公告)号：JPS6043972A
公开(公告)日：1985-03-08
申请号：JP15292683
申请日：1983-08-22
Applicant: SONY CORP
Inventor： MOTOMIYA MASAYUKI , TAMURA TAKAHIKO , TOKUHARA MASAHARU
IPC: H04N5/16
Abstract: PURPOSE:To prevent the fluctuation of luminance level by detecting a black signal and extending the black signal to make the peak value coincides with a pedestal level. CONSTITUTION:A video signal is applied from an input terminal 11 to a one time amplifier 1 and a black detecting circuit 2. A blanking pulse and a reference voltage E1 are applied to the black detecting circuit 2, and the black signal of video signal is detected. The amplitude of detected black signal is controlled by a gain control amplifier 3 and added with the output of the one time amplifier 1 at an addition point 8, and the amplitude of the black signal is extended. The output of addition point 8 is sent to a black peak hold circuit 5 through a blanking circuit 4 and black peak level is detected. Gain of the gain control amplifier 3 is controlled by the difference between detected peak level and a pedestal level EP, and the black peak level is made coincide with the pedestal level.
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公开(公告)号：JPS5991789A
公开(公告)日：1984-05-26
申请号：JP20261782
申请日：1982-11-18
Applicant: SONY CORP
Inventor： IKEGAMI HIROICHI , KUME TSUTOMU , TOKUHARA MASAHARU
Abstract: PURPOSE:To reproduce a color picture with correct color by providing a clamp circuit to a signal line in common of analog three primary color signals and binary three primary color signals and a blanking circuit to a signal line of the binary three primary color signals respectively. CONSTITUTION:Digital color signals Rd-Bd are applied to terminals 1R-1B, then the distortion of the waveform is shaped in the signals Rd-Bd by buffers 6R-6B into a rectangular wave. Since the level of the blanking pulse Rk formed by applying synchronizing pulses Ph, Pv to a pulse forming circuit 12 is at ''0'' in the horizontal scanning period, transistors Q1-Q3 are turned off and the signals Rd-Bd are applied to a picture tube 5 through a path of resistors R1- R3 switches 2R-2B amplifier 3 clamp circuit 4. Thus, even if the signals Rd-Bd are pedestal-clamped by the clamp circuit 4, since the level ''0'' of the signals Rd-Bd is clamped to black color of the reproduced screen, correct color picture is reproduced.
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