首页> 外国专利> secam kleurentelevisiestelsel, with the transmitter in the kleuronderdraaggolf also kleuridentificatiesignalen in frequency modulatedwhile both the transmitter and the receiver is provided with an electronic kleurkanalenomschakelaar,with the conversion in the receiver by the kleuridentificatiesignalen in cooperation with the beeldregelsynchronisatie derived imformatie is determined.as well as transmitter and receiver for this system.

secam kleurentelevisiestelsel, with the transmitter in the kleuronderdraaggolf also kleuridentificatiesignalen in frequency modulatedwhile both the transmitter and the receiver is provided with an electronic kleurkanalenomschakelaar,with the conversion in the receiver by the kleuridentificatiesignalen in cooperation with the beeldregelsynchronisatie derived imformatie is determined.as well as transmitter and receiver for this system.

机译：secam kleurentelevisiestelsel，在kleuronderdraaggolf中的发射器还对kleuridentificatiesignalen进行了调频，同时为发射器和接收器提供电子kleurkanalenomschakelaar，由kleuridentificatiesignalen在接收器中进行转换，并确定了得自同步性的良好信息。和该系统的接收器。

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969,880. Colour television; semi-conductor circuits. COMPAGNIE FRANCAISE DE TELEVISION. April 4, 1963 [April 5, 1962; June 6, 1962; Jan. 7, 1963; March 14, 1963], No. 13530/63. Headings H3T and H4F. Colour Television.-In a colour television system in which two colour signals are transmitted alternately at line frequency with the aid of a switch and at a receiver the two signals are directed into appropriate channels also with the aid of a switch, checking signals are transmitted with one or both colour signals during at least certain of the vertical blanking intervals for the purpose of permitting the receiver to establish its switch operation in the same phase as that of the transmitter. The invention is described as applied to a system inwhich the two colour signals, which are of the form K 1 (R-Y) and K 2 (B-Y), are transmitted as frequency modulations of a subcarrier wave and combined with a luminous signal Y. In carrying out the invention rectangular trapezoidal signals, Fig. 2, each of the duration of one line, are added to the colour signals during a part D of the vertical blanking interval. Fig. 1. The signals are added after an interval C following the actual synchronizing interval A and may persist throughout the remainder of the blanking interval, Fig. 1a, or for only part of the interval, Fig. 1 The checking signals are preferably added to each colour signal (although the Specification briefly discusses operation with one signal) and are added with opposite polarity to the two signals. The signals are of an amplitude corresponding to the maximum allowable modulation level. Colour television transmitter.-A transmitter arrangement is described in block diagram form with reference to Fig. 3 (not shown). The checking signals are added via the colour signal matrix or subsequently, and the combined signals applied to modulate a sub-carrier wave via a switch which is changed over at line rate. The coefficient K 1 for the R-Y signal may be positive or negative. When negative, which is the preferred arrangement, both the colour signal and the checking signal are of opposite polarity to the B-Y signal and its checking signal. The transmitter includes means for applying high-frequency pre-emphasis to the colour signals, and means for suppressing the colour sub-carrier during horizontal blanking intervals and those parts of the vertical blanking intervals not occupied by the checking signals. The regular alternation of the transmitter switch may be discontinued during the vertical blanking interval, before the beginning of the checking signals, preferably at the beginning of the blanking interval, if it is desired to modify the regular alternation of the signals. Colour television receivers-At a receiver, Fig. 4 (not shown), the colour signals whilst still modulated on the sub-carrier wave are directed into separate R-Y and B-Y channels by means of a switch which is changed over at line rate under the control of a bi-stable multivibrator triggered by received line synchronizing pulses. The switch is in the form of a doublepole change-over switch and receives one input directly and the other via a one-line-duration delay circuit. The effect of this arrangement is to provide continuous trains of R-Y and B-Y signals each comprised alternately of direct and delayed signals. The switch outputs are frequency demodulated and then applied through de-emphasis filters (complementing those at the transmitter) to a matrix circuit which produces a G-Y output together with R-Y and B-Y outputs. When the coefficient K 1 for the R-Y signal is chosen to be negative, the frequency demodulator in the R-Y channel is arranged to invert the signal polarity. The matrix circuit functions to produce outputs during the checking signals. If the phase of the receiver switch operation is correct the outputs in response to the checking signals are of one polarity, whereas if the phase is incorrect the outputs reverse in polarity due to the changed polarity of the checking signals. By reason of the form of the matrix equation for deriving G-Y, the polarity change at the G-Y output of the matrix is opposite to that at the R-Y and B-Y outputs. In carrying out the invention, a selected one of the matrix outputs is employed as an indication of the phase of the receiver switch operation. If the phase becomes incorrect the changed polarity is employed to alter the switch operation by causing either an extra trigger pulse to be applied to the switch bistable multivibrator or by suppressing one of the normal line synchronizing trigger pulses. The selected matrix output is integrated and where the output in response to the checking signals is sufficiently distinguished in amplitude from that due to the normal picture signals it may control directly a gate circuit through which the synchronizing pulses pass to trigger the multivibrator. The integrator circuit is associated with a diode so that the gate is opened only in response to a signal of the appropriate polarity. The gate may be formed as a valve circuit, Fig. 11 (not shown), or a transistor circuit, Fig. 12 (see below). In another arrangement, Fig. 7 (see below), the operation is controlled by horizontal flyback pulses so that the matrix output is effective only during the interval occupied by the checking signals. In yet a further arrangement, Fig. 13 (not shown), and Fig. 15 (see below), the system for checking and correcting the phase of the switch operation is combined with a " colour killer " system. A bi-stable circuit, which controls the blocking of the colour channels, is set to the " unblock " state at the beginning of each vertical blanking interval (unless it is already in that state) and is thereafter set in the " block " state unless a checking signal of the correct polarity is obtained from an output of the matrix. Resetting the circuit from the " unblock " to the " block " state is also arranged to produce a pulse which is applied as an extra pulse to the switch bi-stable multivibrator. The effect of the arrangement is (1) to cause automatic blocking of the colour channels during black-and-white operation, when no colour signals and hence no checking signals are received; (2) to cause unblocking of the colour channels when colour signals are received and the phase of the switch operation is correct; and (3) to cause correction of the switch phase when wrong and blocking of the colour channels for the first field following-the detection of an incorrect checking signal. Semi-conductor circuits.-In Fig. 12 line synchronizing pulses are applied from terminal 44 via transistor 360 to trigger the switch bistable multivibrator (see above) which is connected to terminal 65, and the transistor is blocked, so as to suppress the pulses, should the checking pulses (see above), which are applied at terminal 46 and are negative going during correct operation, become positive going. Network 349, 350 constitutes a low-pass filter for the checking pulses, which are at line frequency. Diode 347 prevents operation to negative pulses, whereas positive pulses are passed and integrated in network 342, 352 to produce a positive base bias which blocks the transistor. In Fig. 7 transistor 78 is connected as a normally inoperative blocking oscillator and is controlled by both the checking pulses, which are applied at terminal 46 and become positive when the switch phase is incorrect, and vertical flyback pulses, Fig. 8a, applied at terminal 45. The oscillator is triggered only in response to the simultaneous application of positive base bias due to checking pulses integrated in network Ci, Rb and a negative emitter potential in the form of the first negative half cycle of an oscillation, Fig. 8b, induced in a resonant circuit Le, Ce, by the vertical retrace pulse. The circuit constants are selected so that the negative half cycle persists throughout the interval occupied by the checking pulses. The triggering of the blocking oscillator causes an extra pulse to be added to the train of line synchronizing pulses which are applied from terminal 44 via one winding 75 of the oscillator transformer to the switch bistable multivibrator 65. Reference is also made to the suppression of a pulse. In Fig. 15 a Schmitt trigger circuit 201, 202 is controlled by vertical flyback pulses, Fig. 16, applied at terminal 45 and checking signals, which in this case become positive going for incorrect switch phase, applied at terminal 46. A flyback pulse induces a current, Fig. 17, in a critically damped primary circuit 124, 125, 127 of a transformer 123 and thereby creates a voltage wave in the secondary winding 126 as shown in Fig. 14a. The wave exhibits negative and positive portions each extending beyond the trigger levels A41, A40 of circuit 201, 202, whilst the positive portion is arranged to embrace that part T2-T5 of the vertical blanking interval which includes the checking signal. The voltage wave is applied to the base of transistor 201 via capacitor 121 and its effect would normally be to trigger circuit 201, 202 to one state (i.e. the state when it unblocks the colour killersee above) during the negative portion and then to reset the circuit immediately to the other (the " block ") state during the positive portion. The trigger operation is however also affected by a potential, Fig. 14b, created across capacitor 121 by integration of the checking pulses. The solid line shows the potential produced during correct phase operation: the dotted line shows the potential during incorrect operation. During correct operation the negative potential offsets the positive excursion of the Fig. 14a wave and prevents circuit 201, 202 from being placed in the " block " state, whereas the positive potential during incorrect operation merely aids the triggering to the " block " state. A differentiation circuit 172, 173 and diode 174 provides a pulse on terminal 108 for the switch

机译：969,880。彩色电视;半导体电路。法国电视广播公司。 1963年4月4日[1962年4月5日; 1962年6月6日; 1963年1月7日; [1963年3月14日]，第13530/63号。标题H3T和H4F。彩色电视-在彩色电视系统中，借助于开关以线频率交替传输两个彩色信号，并且在接收器处也借助开关将两个信号定向到适当的频道中，从而发送检查信号在至少一定的垂直消隐间隔期间，用一种或两种颜色信号进行信号转换，目的是允许接收机在与发射机相同的相位中建立其开关操作。将本发明描述为应用于这样的系统，在该系统中，形式为K 1（RY）和K 2（BY）的两个颜色信号作为副载波的频率调制被发送并与发光信号Y组合。实施本发明的矩形梯形信号，如图2所示，在垂直消隐间隔的D部分中，每一行的持续时间加到彩色信号上。图1.信号在实际同步间隔A之后的间隔C之后添加，并且可能在图1a的整个消隐间隔的其余部分或图1的整个间隔中持续存在。每个颜色信号（尽管本规范简要讨论了一个信号的操作），并以相反的极性添加到两个信号中。信号的幅度对应于最大允许调制电平。彩色电视发射机。参考图3（未示出）以方框图的形式描述发射机的结构。经由颜色信号矩阵或随后添加检验信号，并且经由线速切换的开关将组合的信号施加到调制子载波。 R-Y信号的系数K 1可以为正或负。当为负时，这是优选的布置，颜色信号和检查信号都与B-Y信号及其检查信号具有相反的极性。发射机包括用于对彩色信号施加高频预加重的装置，以及用于在水平消隐间隔和垂直消隐间隔中未被检查信号占据的那些部分期间抑制颜色子载波的装置。如果期望修改信号的规则交替，则在垂直消隐间隔期间，在检查信号开始之前，优选在消隐间隔的开始，可以中断发射机开关的规则交替。彩色电视接收机-在图4的接收机（未显示）上，仍在子载波上调制的彩色信号通过一个开关被导引到单独的RY和BY通道，该开关在接收器下以线速切换。接收线路同步脉冲触发的双稳态多谐振荡器的控制。该开关采用双极转换开关的形式，可直接接收一个输入，并通过一个线路持续时间延迟电路接收另一个输入。这种布置的效果是提供连续的R-Y和B-Y信号的列，每个信号分别包括直接信号和延迟信号。开关输出经过频率解调，然后通过去加重滤波器（与发射器的输出互补）施加到矩阵电路，该矩阵电路将产生G-Y输出以及R-Y和B-Y输出。当将R-Y信号的系数K 1选择为负时，R-Y通道中的频率解调器被布置为使信号极性反转。矩阵电路的功能是在检查信号期间产生输出。如果接收器开关操作的相位正确，则响应于检查信号的输出为一个极性，而如果相位不正确，则由于检查信号的极性改变，输出的极性反转。由于用于导出G-Y的矩阵方程的形式，矩阵G-Y输出处的极性变化与R-Y和B-Y输出处的极性变化相反。在实施本发明中，矩阵输出中选定的一个被用作接收器开关操作的相位的指示。如果相位变得不正确，则通过使额外的触发脉冲施加到开关双稳态多谐振荡器或抑制法线同步触发脉冲之一来改变极性，以改变开关操作。所选择的矩阵输出被积分，并且响应于检查信号的输出在幅度上与正常图像信号所引起的幅度充分区分开，它可以直接控制门电路，同步脉冲通过该门电路来触发多谐振荡器。积分器电路与二极管相关联，因此仅响应于适当极性的信号，栅极才打开。该栅极可以形成为图11的阀电路（未示出），或图12的晶体管电路（见下文）。在图7（见下文）的另一种布置中，操作是由水平反激脉冲控制的，因此矩阵输出仅在检查信号占据的间隔内有效。在又一布置中，图13（未示出）和图15（参见下文），用于检查和校正开关操作的相位的系统与“消色剂”系统组合。控制每个颜色通道阻塞的双稳态电路在每个垂直消隐间隔开始时设置为“ unblock”状态（除非它已经处于该状态），然后设置为“ block”状态除非从矩阵的输出获得正确极性的检查信号。还安排将电路从“解锁”状态重置为“阻止”状态，以产生一个脉冲，该脉冲作为额外脉冲施加到开关双稳态多谐振荡器。该布置的效果是：（1）在黑白操作期间当没有接收到颜色信号并且因此没有接收到检查信号时引起颜色通道的自动阻塞; （2）当接收到彩色信号并且切换操作的相位正确时，导致彩色通道的畅通; （3）当错误时引起开关相位的校正，并且在检测到不正确的检查信号之后，在第一场中阻塞彩色通道。半导体电路。-在图12中，经由晶体管360从端子44施加线同步脉冲，以触发连接到端子65的开关双稳态多谐振荡器（参见上文），并且晶体管被阻塞，从而抑制了脉冲如果在正确操作期间施加在端子46上且为负向的检查脉冲（参见上文）变为正向。网络349、350构成用于在线频率上的检查脉冲的低通滤波器。二极管347阻止对负脉冲的操作，而使正脉冲通过并积分到网络342、352中，以产生正基极偏压，该正基极偏压阻挡晶体管。在图7中，晶体管78被连接为通常不工作的阻塞振荡器，并且由两个检查脉冲控制，这两个检查脉冲施加在端子46上，并且在开关相位不正确时变为正，而垂直回扫脉冲（图8a）施加在两个端子上。由于检查网络Ci，Rb中集成的脉冲和以振荡的第一个负半周的形式出现的负发射极电势，仅响应于同时施加正基极偏置，才触发振荡器，如图8b所示。由垂直回扫脉冲在谐振电路Le，Ce中感应。选择电路常数，以使负半周期在检查脉冲占据的整个时间间隔内持续存在。阻塞振荡器的触发导致一个额外的脉冲被添加到一系列的行同步脉冲中，这些行同步脉冲是从端子44经由振荡器变压器的一个绕组75施加到开关双稳态多谐振荡器65上的。脉冲。在图15中，施密特触发器电路201、202由施加在端子45上的图16所示的垂直反激脉冲控制，并在端子46上施加校验信号（在这种情况下，由于开关相位不正确而变为正）。在变压器123的临界阻尼初级电路124、125、127中感应电流（图17），从而在次级绕组126中产生电压波，如图14a所示。该波表现出负的和正的部分，每一个都延伸超过电路201、202的触发电平A41，A40，而正的部分被安排成包围包括检查信号的垂直消隐间隔的部分T2-T5。电压波经电容器121施加到晶体管201的基极，其作用通常是触发电路201，在负部分期间，将电路202恢复到一种状态（即，当其解除对消色剂的阻挡时，见上文），然后在正部分期间将电路立即复位到另一种状态（“阻挡”）。然而，触发操作还受到通过检查脉冲的积分在电容器121两端产生的电势（图14b）的影响。实线显示在正确的相位操作期间产生的电势：虚线显示在错误的操作期间产生的电势。在正确的操作期间，负电位抵消了图14a波形的正偏移，并防止电路201、202处于“阻止”状态，而在错误操作期间的正电位仅有助于触发到“阻止”状态。微分电路172、173和二极管174在端子108上为开关提供脉冲

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公开/公告号NL144467B

专利类型
公开/公告日1974-12-16

原文格式PDF
申请/专利权人 COMPAGNIE FRANCAISE DE TELEVISION LEVALLOIS FRANKRIJK.;
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申请/专利号NL19630291181
发明设计人
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申请日1963-04-05
分类号H04N9/40;
国家 NL
入库时间 2022-08-23 04:38:02

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