公开(公告)号：US4713689A

公开(公告)日：1987-12-15

申请号：US739719

申请日：1985-05-31

申请人： Jacques Veillard

发明人： Jacques Veillard

IPC分类号： H04L27/148 ,  H04N5/455 ,  H04N7/045 ,  H04N11/08 ,  H04N7/04 ,  H04N7/08

CPC分类号： H04N11/08 ,  H04N5/455 ,  H04N7/045

摘要： A receiver is provided for a television system which uses time division miplexing (TDM) of analog image signals and of bursts of duobinary coded digital data signals. The digital data signals are transmitted during the line and frame blanking intervals and grouped together in packets, comprising the sound and synchronization signals, the spectral width required by the analog part being greater than that required by the digital part. The receiver comprises a common frequency demodulator for the analog and digital signals, adaptive as a function of the signal-to-noise ratio after demodulation as a width less than the width which is optimum for the analog part when the latter has a high signal-to-noise ratio. The demodulator has an input filter which is either analog or digital and may be adjusted in response to the error rate.

摘要翻译： 提供了一种用于电视系统的接收机，其使用模拟图像信号的时分复用（TDM）和双二进制编码的数字数据信号的突发。 数字数据信号在行和帧消隐间隔期间被发送，并且被分组在一起，包括声音和同步信号，模拟部分所需的频谱宽度大于数字部分所需的频谱宽度。 接收机包括用于模拟和数字信号的公共频率解调器，作为解调之后的信噪比的函数作为宽度小于当模拟部分具有高信号时的模拟部分最佳的宽度的自适应时， 信噪比。 解调器具有输入滤波器，其为模拟或数字的，并可根据误码率进行调整。

公开(公告)号：US4585998A

公开(公告)日：1986-04-29

申请号：US651843

申请日：1984-09-18

申请人： Jacques Veillard

发明人： Jacques Veillard

IPC分类号： H04L27/227 ,  H04N7/045 ,  H04N7/085 ,  H04L27/14 ,  H04L27/22

CPC分类号： H04N7/085 ,  H04L27/2276 ,  H04N7/045

摘要： A digitally modulated carrier modulated by phase shift keying or frequency shift keying with phase continuity, transmitted as useful bursts distributed at equal time intervals with phase continuity from each burst to the next burst. The carrier frequency is recovered by squaring the carrier for obtaining a spectrum and selecting the carrier frequency within said spectrum. Bursts at an acquisition frequency having the same frequency as the carrier, having a time duration longer than the time duration of the useful bursts and having characteristic features which are particular to said acquisition burst, are sent at times which are separated by time periods having a duration which is longer than the repetition period of the useful bursts by at least an order of magnitude. The acquisition bursts are received along with the useful bursts and squared to provide an acquisition spectrum. A frequency which is double of the carrier frequency is selected within the acquisition period by identifying the characteristic feature of the acquisition bursts.

摘要翻译： 由具有相位连续性的相移键控或频移键控调制的数字调制载波作为有用突发发送，以相等的时间间隔分布，具有从每个脉冲串到下一个脉冲串的相位连续性。 通过平方载波来获得频谱并选择所述频谱内的载波频率来恢复载波频率。 具有与载波相同频率的采集频率的突发​​在具有比有用突发的持续时间长的时间长度并具有对所述采集脉冲串特有的特征特征的时间段上被发送，这些时间间隔具有 持续时间比有效突发的重复周期长至少一个数量级。 采集脉冲串与有用的脉冲串和平方一起被接收以提供采集频谱。 通过识别采集脉冲串的特征，在采集周期内选择两倍于载波频率的频率。

公开(公告)号：US5768165A

公开(公告)日：1998-06-16

申请号：US513807

申请日：1995-09-08

申请人： Jacques Palicot ,  Moise Djoko Kouam ,  Jacques Veillard

发明人： Jacques Palicot ,  Moise Djoko Kouam ,  Jacques Veillard

IPC分类号： H04B3/06 ,  H03H15/00 ,  H03H17/00 ,  H03H17/02 ,  H03H17/06 ,  H03H21/00 ,  G06F17/10 ,  H04M1/00 ,  H04M9/00 ,  H04M9/08

CPC分类号： H03H17/0664 ,  H03H17/0213

摘要： A method for filtering a time signal (e(t)) sampled in blocks of N samples (e(n),e(k)) uses a transfer function defined in the frequency domain by LN samples (H(K)). The transfer function is filtered by a time window (g1) of width N, and a frequency subsampling of ratio N is performed to give a partial transfer function defined over N samples (H1(k)). The method enables the complexity of circuits operating in real time to be optimized. The technique is particularly suitable for correcting long echoes in television picture receivers.

摘要翻译： PCT No.PCT / FR94 / 00259 Sec。 371日期1995年9月8日 102（e）日期1995年9月8日PCT 1994年3月9日PCT公布。 公开号WO94 / 21041 日期1994年9月15日对N个样本（e（n），e（k））的块中采样的时间信号（e（t））进行滤波的方法使用在频域中由LN样本定义的传递函数（H（ K））。 传递函数被宽度N的时间窗（g1）滤波，并且执行比N的频率子采样以给出在N个采样（H1（k））上定义的部分传递函数。 该方法使得实时操作的电路的复杂性得以优化。 该技术特别适用于校正电视图像接收机中的长回波。

公开(公告)号：US4583047A

公开(公告)日：1986-04-15

申请号：US659232

申请日：1984-10-09

申请人： Jeannine Le Goff epouse Henaff ,  Jacques Veillard ,  Daniel Pommier

发明人： Jeannine Le Goff epouse Henaff ,  Jacques Veillard ,  Daniel Pommier

IPC分类号： H04N7/20 ,  H03D3/16 ,  H04B7/185 ,  H04L27/18 ,  H04L27/233 ,  H03D3/00

CPC分类号： H03H9/68 ,  H03D3/16 ,  H04L27/2331

摘要： The circuit comprises a surface acoustic wave device. On the substrate (32)f the surface acoustic wave device, are provided two pairs of input transducers (33, 34, 35, 36) connected, in parallel, to the input of the circuit. The transducers (33, 34, 35, 36) initiate surface acoustic waves corresponding to the signals applied on two pairs of paths (41, 42, 43, 44) ending at two pairs of reception transducers (37, 38, 39, 40). The outputs of the output transducers of the first pair (37, 38) are connected to the two inputs of a mixer (28) whose output yields the received digital signal. The outputs of the second pair of transducers (39, 40) are connected to the inputs of two limiters (26, 27) whose outputs are connected to the two inputs of a mixer (29) whose output yields the analog signal. The difference in path lengths of the first pair (41, 42) introduces a delay of the order of one bit and the difference in path lengths of the second pair (43, 44) introduces a delay equal to the inverse of twice the bandwidth between the peaks of the discriminator thus constituted.

摘要翻译： 电路包括声表面波装置。 在声表面波装置的基板（32）上设置两对并联连接到电路的输入端的输入传感器（33,34,35,36）。 换能器（33,34,35,36）发起对应于施加在以两对接收换能器（37,38,39,40）结束的两对通路（41,42,43,44）上的信号的表面声波， 。 第一对（37,38）的输出换能器的输出端连接到输出产生接收到的数字信号的混频器（28）的两个输入端。 第二对换能器（39,40）的输出连接到两个限制器（26,27）的输入端，输出端连接到输出产生模拟信号的混频器（29）的两个输入端。 第一对（41,42）的路径长度的差异引入了一个比特的顺序的延迟，并且第二对（43,44）的路径长度的差引入了等于两倍于 因此构成鉴别器的峰值。