公开(公告)号：US5099328A

公开(公告)日：1992-03-24

申请号：US621434

申请日：1990-12-04

申请人： Kazuo Kobo ,  Yutaka Miki ,  Kiyotake Fukui ,  Hiroyasu Shinbo ,  Mikio Sasaki ,  Takashi Yamaguchi ,  Takaaki Gyoten ,  Hidefumi Horiuchi

发明人： Kazuo Kobo ,  Yutaka Miki ,  Kiyotake Fukui ,  Hiroyasu Shinbo ,  Mikio Sasaki ,  Takashi Yamaguchi ,  Takaaki Gyoten ,  Hidefumi Horiuchi

IPC分类号： H04N5/21

CPC分类号： H04N5/211

摘要： A ghost canceller includes a ghost cancelling circuit, waveform memories, a CPU, a training signal generating circuit, and a ghost variation detection circuit. By taking in GCR signals from the waveform memories into the CPU, synchronous addition and field sequence processing are effected, and they are transferred to the training signal generating circuit. The input video signal is changed over to the training signal to cancel ghosts, and when ghost variations are is not detected by the ghost variation detection circuit, the input video signal is fed into the ghost cancelling circuit, and is delivered as an output video signal.

公开(公告)号：US4896213A

公开(公告)日：1990-01-23

申请号：US885825

申请日：1986-07-15

申请人： Kazuo Kobo ,  Kiyotake Fukui ,  Toshiro Nozoe ,  Noriaki Morotomi

发明人： Kazuo Kobo ,  Kiyotake Fukui ,  Toshiro Nozoe ,  Noriaki Morotomi

IPC分类号： H04N5/44 ,  H04N5/21 ,  H04N7/035

CPC分类号： H04N5/211 ,  H04N7/035

摘要： A ghost cancelling reference signal transmission/reception system, which allows a built-in ghost cancelling device to eliminate group-delay distortion, frequency-amplitude characteristic distortion, ghost components generated in a signal transmission path. A digital signal is superposed on a television signal in a vertical blanking period of the television signal as a ghost cancelling reference signal.

摘要翻译： 重影消除参考信号发送/接收系统，其允许内置重影消除装置消除组延迟失真，频率幅度特性失真，在信号传输路径中产生的重影分量。 数字信号在电视信号的垂直消隐期间叠加在电视信号上作为重影消除参考信号。

公开(公告)号：US5353069A

公开(公告)日：1994-10-04

申请号：US59266

申请日：1993-05-11

申请人： Kazuo Kobo ,  Kazuya Uyeda ,  Robert Ho ,  Takashi Yamaguchi

发明人： Kazuo Kobo ,  Kazuya Uyeda ,  Robert Ho ,  Takashi Yamaguchi

IPC分类号： H04N5/21 ,  H04N5/213

CPC分类号： H04N5/211

摘要： A waveform equalizing system includes a clock reproducing phase locked loop circuit for reproducing a clock signal from a television signal; a transversal filter; a first selector circuit for alternatively passing the television signal or an output of a first memory to the transversal filter; a CPU for extracting reference signals contained in the television signal from the input and output of the transversal filter through two second memories respectively and for performing a synchronous addition of the same; the first memory for storing a reference signal processed by the synchronous addition; and a second selector circuit for alternatively delivering the television signal or an output of the transversal filter in response to a control signal from the CPU. The CPU is arranged for calculating a phase difference between the clock signal of the clock reproducing circuit and its ideal form from the reference signal processed by the synchronous addition and controlling a clock signal phase of the clock reproducing phase locked loop circuit to correct the phase difference.

摘要翻译： 波形均衡系统包括用于从电视信号再现时钟信号的时钟再生锁相环电路; 横向过滤器 第一选择器电路，用于交替地将电视信号或第一存储器的输出传递到横向滤波器; CPU，用于通过两个第二存储器分别从横向滤波器的输入和输出中提取包含在电视信号中的参考信号，并且用于执行其同步相加; 用于存储通过同步加法处理的参考信号的第一存储器; 以及第二选择器电路，用于响应于来自CPU的控制信号交替地传送电视信号或横向滤波器的输出。 CPU被配置为从由同步加法处理的参考信号和时钟再现锁相环电路的时钟信号相位计算时钟再现电路的时钟信号与其理想形式之间的相位差，以校正相位差 。

公开(公告)号：US5495299A

公开(公告)日：1996-02-27

申请号：US359924

申请日：1994-12-20

申请人： Hidekazu Suzuki ,  Masashi Kubota ,  Kazuo Kobo

发明人： Hidekazu Suzuki ,  Masashi Kubota ,  Kazuo Kobo

IPC分类号： H04N5/21

CPC分类号： H04N5/21

摘要： A noise reducer for outputting a noise-reduced signal by extracting noise included in an input video signal so as to produce a noise signal and by subtracting the noise signal from the input video signal is provided. The noise reducer includes: a signal processing portion which includes: a delay means for delaying the noise-reduced signal by a predetermined time period thereby outputting a delayed signal; a first subtracter for subtracting the delayed signal from the input video signal thereby outputting a differential signal; an orthogonal transformer for conducting orthogonal transformation on the differential signal, each pixel block of the differential signal being transformed as a unit, thereby outputting an orthogonally transformed signal; a nonlinear processing portion for conducting nonlinear processing on the orthogonally transformed signal based on a predetermined threshold thereby outputting a nonlinear processed signal; an orthogonal inverse transformer for conducting an inverse transformation of the orthogonal transformation on the nonlinear processed signal thereby outputting an inversely transformed signal; an attenuator for attenuating the inversely transformed signal by a predetermined coefficient thereby outputting the noise signal; a second subtracter for subtracting the noise signal from the input video signal thereby outputting the noise-reduced signal; and an adaptive control portion for controlling at least one of the predetermined threshold and the predetermined coefficient based on at least one of the differential signal and the orthogonally transformed signal.

摘要翻译： 一种降噪器，用于通过提取包括在输入视频信号中的噪声来输出噪声降低信号，以产生噪声信号，并通过从输入视频信号中减去噪声信号。 降噪器包括：信号处理部分，包括：延迟装置，用于将噪声降低信号延迟预定时间段，从而输出延迟信号; 第一减法器，用于从输入视频信号中减去延迟信号，从而输出差分信号; 用于对差分信号进行正交变换的正交变换器，将差分信号的每个像素块变换为单位，从而输出正交变换的信号; 非线性处理部分，用于基于预定阈值对正交变换的信号进行非线性处理，从而输出非线性处理信号; 正交逆变换器，用于对非线性处理信号进行正交变换的逆变换，从而输出反变换信号; 衰减器，用于衰减反变换信号预定系数，从而输出噪声信号; 第二减法器，用于从输入视频信号中减去噪声信号，从而输出降噪信号; 以及自适应控制部分，用于基于差分信号和正交变换信号中的至少一个来控​​制预定阈值和预定系数中的至少一个。

公开(公告)号：US4673979A

公开(公告)日：1987-06-16

申请号：US743366

申请日：1985-06-11

申请人： Kazuo Kobo ,  Noriaki Morotomi ,  Takeshi Sato

发明人： Kazuo Kobo ,  Noriaki Morotomi ,  Takeshi Sato

IPC分类号： H04N7/035 ,  H04N7/087

CPC分类号： H04N7/035

摘要： A digital data reproducing system which carries out quantization by the frequency over the transmission rate with respect to waveform distortion created by a group delay caused by ghosts and repeaters or the like when digital information signals are received so as to thereby perform waveform equalization, and which carries out phase correction to thereby enable data reproduction about equivalent to that quantized by an ideal sampling timing, thus realizing entire digitization of the data reproducing system.

摘要翻译： 数字数据再现系统，当接收到数字信息信号时，对由重影器和中继器等引起的组延迟所产生的波形失真，通过传输速率的频率进行量化，从而进行波形均衡，以及哪些 执行相位校正，从而能够实现与理想采样定时量化的数据相当的数据再现，从而实现数据再现系统的全部数字化。