公开(公告)号：US5184219A

公开(公告)日：1993-02-02

申请号：US691856

申请日：1991-04-26

申请人： Hyun-Deok Cho

发明人： Hyun-Deok Cho

IPC分类号： H04N7/015 ,  H04N7/087 ,  H04N7/12 ,  H04N11/04 ,  H04N11/24

CPC分类号： H04N7/087 ,  H04N11/006 ,  H04N19/587 ,  H04N19/30

摘要： An HDTV system wherein the HDTV signals may have the same frequency band as that of the conventional color television signals and be transmitted through a unoccupied channel of the conventional color television system, is disclosed. The HDTV system includes a ITLC circuit for compressing on time-base the digital signals; a band separation circuit for separating the output signal of the ITLC circuit into low and high frequency band signal; a motion vector detector for detecting motion vector from the low frequency band signals; a high frequency band signal processor for processing the high frequency band signals according to the output of motion vector detector; a first LPF for filtering the high frequency analog signal; a second LPF for filtering the low frequency analog signal; and a quadrature modulator for multiplying the output of the first and second LPF, respectively, by Cos .omega.t signal and Sin .omega.t signal, and thereafter adding the multiplied signals to each other to produce therefrom a transmission signal.

摘要翻译： 公开了一种HDTV系统，其中HDTV信号可以具有与常规彩色电视信号相同的频带，并通过常规彩色电视系统的未占用频道进行传输。 HDTV系统包括用于基于时间压缩数字信号的ITLC电路; 用于将ITLC电路的输出信号分离成低频和高频信号的频带分离电路; 运动矢量检测器，用于从低频带信号中检测运动矢量; 高频带信号处理器，用于根据运动矢量检测器的输出处理高频信号; 用于对高频模拟信号进行滤波的第一LPF; 用于对低频模拟信号进行滤波的第二LPF; 以及正交调制器，用于将第一和第二LPF的输出分别乘以Cosωω信号和Sinωt信号，然后将相乘后的信号相加，从而产生发送信号。

公开(公告)号：US5898464A

公开(公告)日：1999-04-27

申请号：US870448

申请日：1997-06-06

申请人： Hyun-Deok Cho

发明人： Hyun-Deok Cho

IPC分类号： H04N5/208 ,  H04N9/68

CPC分类号： H04N5/208

摘要： A method which can be used to enhance an outline of an image displayed in an image display apparatus such as a television receiver, and a circuit performing the method. The circuit includes a peaking signal generation circuit which generates a first peaking signal and a second peaking signal corresponding to an amplitude transition of a video signal. A first peaked video signal generation circuit generates a first peaked video signal by adding the first peaking signal to the video signal. A control signal generation circuit generates a first control signal based on a result of comparing a first-order differential signal developed by differentiating the video signal with a reference signal, and a second control signal by delaying the first control signal for the predetermined period. A first selection circuit selects either the video signal or the first peaked videos signal according to the first control signal. A second peaked video signal generation circuit generates a second peaked video signal by adding the second peaking signal to the first selected signal. And, a second selection circuit selects either the first selected signal or the second peaked signal to develop a second selected signal, and outputs the second selected signal as an enhanced video signal. Therefore, the circuit can enhance an outline of an image formed by a video signal without modifying an amplitude transition time of the video signal and introducing the preshoot and overshoot into the video signal.

摘要翻译： 可以用于增强显示在诸如电视接收机的图像显示装置中的图像的轮廓的方法，以及执行该方法的电路。 该电路包括产生与视频信号的幅度转变相对应的第一峰化信号和第二峰化信号的峰化信号产生电路。 第一峰值视频信号产生电路通过将第一峰值信号加到视频信号来产生第一峰值视频信号。 控制信号生成电路基于将通过对视频信号进行微分而产生的一阶差分信号与参考信号进行比较的结果生成第一控制信号，以及通过在预定时间段内延迟第一控制信号来产生第二控制信号。 第一选择电路根据第一控制信号选择视频信号或第一峰值视频信号。 第二峰值视频信号产生电路通过将第二峰值信号加到第一选定信号来产生第二峰值视频信号。 并且，第二选择电路选择第一选择信号或第二峰值信号以产生第二选定信号，并输出第二选定信号作为增强视频信号。 因此，电路可以增强由视频信号形成的图像的轮廓，而不改变视频信号的幅度转换时间，并将预拍和过冲引入视频信号。

公开(公告)号：US5200811A

公开(公告)日：1993-04-06

申请号：US685822

申请日：1991-04-16

申请人： Hyun-Deok Cho

发明人： Hyun-Deok Cho

IPC分类号： H04N11/08 ,  H04N5/455 ,  H04N5/60 ,  H04N7/015 ,  H04N7/087 ,  H04N7/12 ,  H04N7/46 ,  H04N11/24

CPC分类号： H04N11/006 ,  H04N19/186 ,  H04N19/587 ,  H04N19/59 ,  H04N5/455 ,  H04N7/015 ,  H04N7/087 ,  H04N5/44 ,  H04N5/60

摘要： A method for receiving a high definition television signal has been used by the band-splitting and sub-sampling method. The concrete embodiment for the method can be accomplished by converting the received radio frequency signal into a first intermediate frequency signal, and by splitting a second intermediate frequency signal and a narrow band intermediate frequency signal therefrom. The narrow band intermediate frequency signal is lacked a given fixed frequency to demodulate the second intermediate frequency signal in a quadrature phase-shift technique. The demodulated signal is low-pass filtered and converted into a digital signal to separate into a synchronizing, an audio signal, a control signal therefrom. The digital signal is processed at high frequency band according to the control signal, and delayed a given time. The delayed signal is added to the signal processed at high frequency band. The added signal is separated into a luminance and chrominance signals to convert into an analog signals.

摘要翻译： 用于接收高分辨率电视信号的方法已被频带分割和次采样方法所采用。 该方法的具体实施例可以通过将接收到的射频信号转换为第一中频信号，并通过从其分离第二中频信号和窄带中频信号来实现。 窄带中频信号缺少给定的固定频率以在正交相移技术中解调第二中频信号。 解调信号被低通滤波并转换为数字信号，以分离成同步音频信号，控制信号。 数字信号根据控制信号在高频段进行处理，延时给定时间。 将延迟信号加到在高频带处理的信号上。 所附加的信号被分成亮度和色度信号以转换为模拟信号。