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1.发明授权Video signal synchronization system as for an extended definition widescreen television signal processing system 失效视频信号同步系统用于扩展定义宽屏电视信号处理系统
公开(公告)号：US4912549A
公开(公告)日：1990-03-27
申请号：US241277
申请日：1988-09-07
CPC分类号： H04N7/015 , H04N11/002 , Y10S348/903 , Y10S348/904
摘要： Apparatus and method of synchronizing the component signals of a multi-component augmented television signal between its generation reception are disclosed. The disclosed apparatus includes circuitry which generates a training signal that indicates the position of the first pixel in each horizontal line interval of the video signal. This training signal is inserted into one horizontal line interval of the active video signal for transmission. The receiver includes circuitry which separates the training signal and derives a timing signal from it. The timing signal is used to define the pixel positions of various decoded components of the received video signal to facilitate their combination. The timing signal is also used to align the color subcarrier signal and to generate other carrier and subcarrier signals used in the decoding process. Two training signals are disclosed: a pseudo-random noise sequence and a time-reversed, all-pass filtered, raised-cosine 2T pulse.
摘要翻译： 公开了在其生成接收之间同步多分量增强电视信号的分量信号的装置和方法。 所公开的装置包括生成指示视频信号的每个水平行间隔中的第一像素的位置的训练信号的电路。 将该训练信号插入到有源视频信号的一个水平线间隔中以进行传输。 接收机包括分离训练信号并从其导出定时信号的电路。 定时信号用于定义接收到的视频信号的各种解码分量的像素位置，以便于它们的组合。 定时信号还用于对准彩色副载波信号并产生在解码过程中使用的其它载波和副载波信号。 公开了两个训练信号：伪随机噪声序列和时间反转全通滤波的升余弦2T脉冲。
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2.发明授权Adaptive television ghost cancellation system including filter circuitry with non-integer sample delay 失效自适应电视重影消除系统包括具有非整数采样延迟的滤波器电路
公开(公告)号：US4864403A
公开(公告)日：1989-09-05
申请号：US153748
申请日：1988-02-08
CPC分类号： H04L25/03038 , H04N5/211
摘要： A television signal ghost cancellation system is described in which a microprocessor is used to develop a mathematical model of the transmission channel which produced a ghosted video signal. The microprocessor determines the coefficient values and delay values for a digital IIR filter from this model. The system uses the IIR filter to cancel ghost signals from the ghosted video signal. The IIR filter includes circuitry for interpolating between successively delayed sample values to cancel ghost signals which are delayed by a non-integer number of sample periods.
摘要翻译： 描述了一种电视信号重影消除系统，其中使用微处理器来开发产生重影视频信号的传输信道的数学模型。 微处理器从该模型确定数字IIR滤波器的系数值和延迟值。 该系统使用IIR滤波器从重影的视频信号中消除重影信号。 IIR滤波器包括用于在连续延迟的采样值之间内插的电路，以消除延迟了非整数个采样周期的重影信号。
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3.发明授权
公开(公告)号：US4980767A
公开(公告)日：1990-12-25
申请号：US494941
申请日：1990-03-14
申请人： Tzy-Hong Chao , Burton R. Saltzberg , Jin-Der Wang
发明人： Tzy-Hong Chao , Burton R. Saltzberg , Jin-Der Wang
CPC分类号： H04L27/2331 , H04L25/03133 , H04L27/38 , H04N5/211 , H04N7/015
摘要： The present invention covers the notion of determining signal dispersion characteristics, such as amplitude, phase and delay, by transmitting training sequences. More specifically, each sequence comprises a plurality of predetermined symbols and is transmitted two or more times. Detection of each training sequence is provided by a correlator at the receiver. This detection creates a signal peak for each training sequence at the output of the correlator. Between the peaks, a "quiet zone" is created which permits signal dispersion in this zone to be characterizerd with respect to amplitude, phase and delay. Two different quiet zones are utilized to resolve ambiguities which arise in determining the aforesaid signal dispersion characteristics.
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4.发明授权Sampled data filtering system, including a crossbar switch matrix, as for a ghost cancellation system 失效采样数据过滤系统，包括交叉开关矩阵，如重影取消系统
公开(公告)号：US4727424A
公开(公告)日：1988-02-23
申请号：US919494
申请日：1986-10-16
申请人： Tzy-Hong Chao
发明人： Tzy-Hong Chao
摘要： A sampled data filter used in a television automatic ghost cancellation system employs a single chain of cascaded delay elements and a crossbar switch matrix to implement the several different delayed sequences of samples that are used by the system to cancel several ghost signals. The rows of switch elements in the crossbar switch matrix are coupled to the individual delay elements, and the columns of the matrix are coupled to sample scaling circuitry. The scaled samples are summed to develop a psuedo-ghost signal which is combined with the input signal to cancel the ghost signal components.
摘要翻译： 在电视自动重影消除系统中使用的采样数据滤波器采用级联延迟元件的单链和交叉开关矩阵来实现由系统使用以取消多个重影信号的几个不同的延迟序列。 交叉开关矩阵中的开关元件行被耦合到各个延迟元件，并且矩阵的列耦合到采样缩放电路。 将缩放的样本相加以形成伪输出信号，该信号与输入信号组合以取消重影信号分量。
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