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    • 2. 发明授权
    • SECAM decoder with phase-locked loop demodulators
    • SECAM解码器与相位锁定解调器
    • US5194938A
    • 1993-03-16
    • US760532
    • 1991-09-17
    • Michel ImbertGerard Bret
    • Michel ImbertGerard Bret
    • H04N9/64H04N11/18
    • H04N11/186
    • A SECAM decoder comprises an input receiving a chrominance subcarrier (SP); first and second outputs delivering respectively the decoded blue (B2) and red (R2) signals; a first PLL phase demodulator (30) receiving the subcarrier (SP), operative only during the blue lines; a second PLL phase demodulator (31) receiving the subcarrier, operative only during the red lines; a first adder (32) receiving the output signal (B1) of the first demodulator (30) and this same signal delayed by a line period to deliver the decoded blue signal (B2); an adder (33) receiving the output signal (R1) of the second demodulator (31) and this same signal delayed by a line period to deliver the red decoded signal (R2).
    • SECAM解码器包括接收色度副载波(SP)的输入端; 分别输出解码的蓝色(B2)和红色(R2)信号的第一和第二输出; 接收子载波(SP)的第一PLL相位解调器(30),仅在蓝线期间操作; 接收子载波的第二PLL相位解调器(31),仅在红线期间操作; 接收第一解调器(30)的输出信号(B1)的第一加法器(32)和延迟线路周期的相同信号以递送解码的蓝色信号(B2); 接收第二解调器(31)的输出信号(R1)的加法器(33)和延迟线路周期的相同信号以递送红色解码信号(R2)。
    • 3. 发明授权
    • System for converting digital television signals with insertion of
interactive menus
    • 用于通过插入交互式菜单转换数字电视信号的系统
    • US6005629A
    • 1999-12-21
    • US863669
    • 1997-05-27
    • Jean-Louis DoucheAlain ArtieriMichel Imbert
    • Jean-Louis DoucheAlain ArtieriMichel Imbert
    • H04N11/04G06T9/00H04N5/44H04N7/01H04N7/26H04N7/52H04N11/20
    • H04N21/4348G06T9/00H04N21/23614H04N5/4401Y10S370/916
    • A system for converting digital television signals encoded according to an MPEG standard into standardized analog video signals. The system includes means for generating graphic images and for inserting corresponding image signals in a decoded digital flow of main image signals, a digital decoding unit, and an analog coding unit. The digital decoding unit includes means for providing a flow of multiplexed image signals including a first flow of main image signals and of a second flow of image signals that contains, in addition to the main image signals, possible graphic image signals. The analog coding unit includes a demultiplexer of the flow of multiplexed image signals and two encoders. The two encoders respectively receive the first and second flows, and each respectively provide a digital flow of images encoded according to a color television standard to digital-to-analog converters respectively associated therewith, the digital-to-analog converters providing the standardized analog video signals.
    • 用于将根据MPEG标准编码的数字电视信号转换成标准化模拟视频信号的系统。 该系统包括用于产生图形图像和用于在主图像信号的解码数字流中插入相应图像信号的装置,数字解码单元和模拟编码单元。 数字解码单元包括用于提供包括主图像信号的第一流和第二图像信号流的多路复用图像信号流的装置,除了主图像信号之外,还包含可能的图形图像信号。 模拟编码单元包括多路复用图像信号的流分解器和两个编码器。 两个编码器分别接收第一和第二流,并且各自分别提供根据彩色电视标准编码的图像的数字流,分别与其相关联的数模转换器,提供标准化模拟视频的数模转换器 信号。
    • 4. 发明授权
    • Automatic method for identifying a color TV standard
    • 用于识别彩色电视标准的自动方法
    • US5192997A
    • 1993-03-09
    • US650567
    • 1991-02-05
    • Michel ImbertFrederic Lambert
    • Michel ImbertFrederic Lambert
    • H04N9/00H04N9/64H04N17/00
    • H04N9/642
    • A method for automatically identifying the PAL or NTSC color TV standard comprises the following steps: providing a first demodulation signal (IC1) with the regenerated 90.degree.-phased sub-carrier; providing a second demodulation signal at the reference frequency of one of the colors (FOR) of the SECAM standard; providing a first voltage (VC1) by integrating the first demodulation signal (IC1), and providing a first associated logic criterion (C1), simultaneously applying the first signal (IC1) at the input of an inverter switched according to the rate of a non-half line-frequency phased signal (FL/2), providing a second voltage (VC2) by integrating the output signal (ICC) of the inverter (31), and providing a second associated logic criterion (C2); similarly providing, but from the second demodulation signal (IC2), the first logic criterion (C1) and the second logic criterion (C2); and identifying the standard received as a function of the state of the first and second logic criteria (C1 and C2).
    • 一种用于自动识别PAL或NTSC彩色电视标准的方法包括以下步骤:用再生的90°相位副载波提供第一解调信号(IC1); 以SECAM标准的一种颜色(FOR)的参考频率提供第二解调信号; 通过对第一解调信号(IC1)进行积分并提供第一相关联的逻辑判据(C1)来提供第一电压(VC1),同时将第一信号(IC1)施加在根据非线性的速率切换的逆变器的输入端 (FL / 2),通过对逆变器(31)的输出信号(ICC)进行积分并提供第二相关逻辑判据(C2)来提供第二电压(VC2); 类似地提供第二解调信号(IC2),第一逻辑标准(C1)和第二逻辑标准(C2); 以及根据第一和第二逻辑标准(C1和C2)的状态来识别所接收的标准。
    • 6. 发明授权
    • Method and circuit for frequency and phase locking a local oscillator
for television
    • 用于频率和相位锁定电视本地振荡器的方法和电路
    • US4561014A
    • 1985-12-24
    • US563866
    • 1983-12-21
    • Patrick DouziechMichel Imbert
    • Patrick DouziechMichel Imbert
    • H04N9/45H03L7/10H04N9/455H04N9/46
    • H03L7/10H04N9/455
    • A conventional phase locking loop for locking a local oscillator in phase and frequency to a color burst signal in a television system requires a highly stable (i.e. crystal controlled) oscillator whose free running frequency must be individually adjusted to be as close as possible to the desired frequency. The present invention enables such adjustment to take place automatically in operation rather than as a separate manufacturing step. The output from the oscillator is compared in phase with the color burst signal to which it is to be locked. The output from the phase comparator is applied to one input of a differential amplifier whose output constitutes an error signal for application to a frequency controlling input of the oscillator. The error signal is also applied to a threshold control circuit which causes an up/down counter to count up or down when the error signal lies outside a predetermined range. The counter total is converted to analog form and is applied to the control input in addition to the error signal.
    • 用于将本地振荡器在相位和频率上锁定到电视系统中的色同步信号的常规相位锁定环路需要高度稳定(即,晶体控制的)振荡器,其自由运行频率必须被单独调整为尽可能接近所需的 频率。 本发明使得这种调节能够在操作中自动发生,而不是单独的制造步骤。 将振荡器的输出与要被锁定的色同步信号进行相位比较。 来自相位比较器的输出被施加到差分放大器的一个输入端,差分放大器的输出构成用于施加到振荡器的频率控制输入的误差信号。 误差信号也被应用于阈值控制电路,当阈值控制电路在错误信号位于预定范围之外时,其使向上/向下计数器向上或向下计数。 计数器总数转换为模拟形式,除误差信号之外还应用于控制输入。
    • 7. 发明授权
    • Digital television signal flow regulation
    • 数字电视信号流调节
    • US06097446A
    • 2000-08-01
    • US863660
    • 1997-05-27
    • Michel ImbertSerge VolmierXavier Cauchy
    • Michel ImbertSerge VolmierXavier Cauchy
    • H04N5/06H04N5/44H04N7/26H04N7/56H04N9/64H04N5/04H04N7/01
    • H04N7/56H04N21/440218H04N5/4401
    • The present invention relates to a method for regulating, in the read mode, memory areas of a circuit for decompressing a video data flow compressed according to an MPEG standard, with respect to the writing rate of the compressed data flow into the memory areas, the decompression circuit issuing a flow of image data at the rate of signals for horizontally and vertically synchronizing the images issued by a circuit for coding according to a color television standard, this method including generating a clock signal having a fixed frequency for reading from the memory areas and for generating the horizontal and vertical synchronization signals, and shifting the occurrence of an edge triggering the vertical synchronization signal based on a signal indicative of the state of a buffer memory associated with the memory areas.
    • 本发明涉及一种用于在读取模式下调节用于解压缩根据MPEG标准压缩的视频数据流的电路的存储区域,该方法关于压缩数据流到存储区域的写入速率, 解压缩电路以按照彩色电视标准的用于水平和垂直同步用于编码的电路的图像的信号速率发出图像数据流,该方法包括产生具有固定频率的时钟信号以从存储区域读取 并且用于产生水平和垂直同步信号,并且基于指示与存储器区域相关联的缓冲存储器的状态的信号来移动触发垂直同步信号的边沿的出现。
    • 8. 发明授权
    • Detection circuit for a video tape recorder signal
    • 录像机信号检测电路
    • US4942472A
    • 1990-07-17
    • US284311
    • 1988-12-06
    • Michel ImbertJean-Marc Merval
    • Michel ImbertJean-Marc Merval
    • H04N5/44H04N5/05H04N5/12
    • H04N5/05H04N5/126
    • A detection circuit for a video tape recorder signal on the input of a TV set connected to a line synchronization separating circuit (11) in turn connected to a PLL (12) comprises a first phase comparator (15), the PLL (12) exhibiting a first time constant (I1, C1) corresponding to an operation on a normal TV signal. This circuit further comprises a switch (20) for switching the PLL on a second time constant (3I1, C1) shorter than the first one, a second phase comparator (22) for comparing the input and output phases of the first phase comparator, the second phase comparator being associated with a third time constant (I2, C2) shorter than the first and second ones, a threshold comparator (24) supplying to the switch (20) a control signal when the comparator output (22) is outside determined limits.
    • 用于连接到线路同步分离电路(11)的连接到PLL(12)的电视机的输入上的录像机信号的检测电路包括第一相位比较器(15),PLL(12)显示 对应于对正常TV信号的操作的第一时间常数(I1,C1)。 该电路还包括用于在比第一时间常数短的第二时间常数(3I1,C1)上切换PLL的开关(20),用于比较第一相位比较器的输入和输出相位的第二相位比较器(22), 第二相位比较器与比第一和第二时间常数短的第三时间常数(I2,C2)相关联;阈值比较器(24)当比较器输出(22)在外部确定的极限值时向开关(20)提供控制信号 。
    • 9. 发明授权
    • Automatic connection system on a color TV S-VHS input
    • 彩色电视S-VHS输入端的自动连接系统
    • US5134483A
    • 1992-07-28
    • US658609
    • 1991-02-21
    • Michel ImbertThierry Meunier
    • Michel ImbertThierry Meunier
    • H04N5/44H04N5/46H04N5/775H04N9/64H04N9/83
    • H04N5/775H04N9/641H04N9/833
    • An automatic connection circuit on either of the input terminals of a TV set, each of these inputs receiving video signals according to one of several standards, comprising a standard identification circuit (10) and a selection circuit (11), the identification circuit sending an inhibition signal (IN) to the selection circuit when it has detected a selected standard; a switch (14), the first terminal (12) of which is connected to the input of the identification circuit and the second terminal of which is connected to either of the input terminals by the action of a control signal (16); a divider (15) receiving a periodic signal and providing a signal for controlling the selection circuit according to a first period and the switch according to a half period, this divider being inhibited by said inhibition signal.
    • 一种电视机的输入端子中的任一个的自动连接电路,其中的每一个都根据多种标准中的一种接收视频信号,包括标准识别电路(10)和选择电路(11),所述识别电路发送 禁止信号(IN)到选择电路时检测到选定的标准; 开关(14),其第一端子(12)连接到识别电路的输入端,并且其第二端子通过控制信号(16)的作用连接到任一个输入端子; 接收周期信号的分频器(15),并根据第一周期提供用于控制选择电路的信号和根据半周期的开关,该分频器被所述抑制信号抑制。