-
公开(公告)号：US4884136A
公开(公告)日：1989-11-28
申请号：US250160
申请日：1988-09-28
IPC分类号： H04N19/50 , H04N5/14 , H04N7/015 , H04N11/04 , H04N19/00 , H04N19/423 , H04N19/59 , H04N19/80 , H04N19/85
CPC分类号： H04N7/0152 , H04N19/503 , H04N5/144
摘要： The motion detection circuit is so constructed that an interframe difference signal is passed through a horizontal direction LPF and a vertical direction LPF in cascade connection, and the interframe difference signal thus obtained is divided by the value obtained by mixing an edge signal of an image and the image level signal of the image by a mixing circuit, thus providing a motion signal.
摘要翻译： 运动检测电路被构造成使得帧间差分信号在级联连接中通过水平方向LPF和垂直方向LPF，并且将由此获得的帧间差分信号除以通过混合图像的边缘信号和 通过混合电路的图像的图像级信号，从而提供运动信号。
-
2.发明授权TV signal recording and reproducing apparatus employing a digital interface and including signal drop-out compensation 失效TV信号记录和再现装置采用数字接口并包括信号丢失补偿
公开(公告)号：US4943858A
公开(公告)日：1990-07-24
申请号：US314089
申请日：1989-02-23
CPC分类号： H04N9/88 , H04N7/0152
摘要： A recording and reproducing apparatus is disclosed in whic
摘要翻译： 公开了一种记录和再现装置
-
公开(公告)号：US4963969A
公开(公告)日：1990-10-16
申请号：US314087
申请日：1989-02-23
CPC分类号： H04N5/52
摘要： Disclosed is an automatic gain control device which comprises: a first amplitude detection circuit for detecting an average amplitude value of a television video signal, a peak amplitude value of the same television video signal, or a value obtained by mixing the average amplitude value and the peak amplitude value with a predetermined mixing ratio; a second amplitude detection circuit for detecting an amplitude value of a vertical or horizontal synchronizing signal in the television video signal; an amplitude control circuit for controlling an amplitude of an input television video signal; a synchronization circuit for detecting a vertical synchronizing signal and a horizontal synchronizing signal in the television video signal so as to generate various pulses including a clock pulse synchronized with the input television video signal by controlling an oscillation frequency of an oscillation circuit; and a synchronization phase lock detection circuit for detecting whether the synchronization circuit has been pulled into synchronism with the input television video signal, so that the amplitude control circuit is controlled by an output of the second amplitude detection circuit when synchronization phase-lock is established while controlled by an output of the first amplitude detection circuit when the synchronization phase-lock comes out.
摘要翻译： 公开了一种自动增益控制装置，包括：第一幅度检测电路，用于检测电视视频信号的平均振幅值，相同电视视频信号的峰值振幅值，或通过混合平均振幅值和 具有预定混合比的峰值振幅值; 第二振幅检测电路，用于检测电视视频信号中的垂直或水平同步信号的振幅值; 幅度控制电路，用于控制输入电视视频信号的幅度; 用于检测电视视频信号中的垂直同步信号和水平同步信号的同步电路，以通过控制振荡电路的振荡频率产生包括与输入电视视频信号同步的时钟脉冲的各种脉冲; 以及同步锁相检测电路，用于检测同步电路是否已被拉入与输入的电视视频信号同步，使得当建立同步锁相时，幅度控制电路由第二幅度检测电路的输出控制，而 当同步锁相出来时由第一幅度检测电路的输出控制。
-
公开(公告)号：US4912556A
公开(公告)日：1990-03-27
申请号：US314182
申请日：1989-02-23
CPC分类号： H04N5/208
摘要： There is provided an apparatus for compensating a contour of a television signal in a TV signal processing apparatus in which a predetermined control signal including a field interpolation control signal to control an interpolating method when reconstructing by an interpolation an image signal which was band compressed by the sub-Nyquist sampling is time sharingly multiplexed for a blanking period, wherein a signal of a still area processed by a still image system processing circuit and a signal of an animation area processed by an animation image system processing circuit are mixed by a mixing circuit every pixel, when the mixed signal is used as an input signal to the subsequent circuits, the OR of the binary signal of the movement amount and the field interpolation control signal transmitted from the transmission side is calculated, the still and animation areas are distinguished by the OR signal, and a contour is emphasized by a two-dimensional contour compensating circuit for the signal in the animation area.
摘要翻译： 提供了一种用于补偿TV信号处理装置中的电视信号的轮廓的装置，其中包括场插值控制信号的预定控制信号，用于当通过内插重建由内插方法压缩的图像信号时控制内插方法 子奈奎斯特采样在消隐期间进行时分复用，其中由静止图像系统处理电路处理的静止区域的信号和由动画图像系统处理电路处理的动画区域的信号由混合电路每个 像素，当混合信号被用作后续电路的输入信号时，计算出从发送侧发送的移动量的二进制信号与场插值控制信号的“或”，静止和动画区域由 OR信号，并且轮廓被二维轮廓补偿电路强调 信号在动画区域。
-
公开(公告)号：US5008753A
公开(公告)日：1991-04-16
申请号：US314090
申请日：1989-02-23
申请人： Hiromu Kitaura , Mitsuo Isobe , Isao Kawahara , Yoshio Hirauchi , Yuichi Ninomiya , Yoshimichi Ohtsuka , Yoshinori Izumi
发明人： Hiromu Kitaura , Mitsuo Isobe , Isao Kawahara , Yoshio Hirauchi , Yuichi Ninomiya , Yoshimichi Ohtsuka , Yoshinori Izumi
IPC分类号： H04N5/18
CPC分类号： H04N5/18
摘要： A clamp system for television signal comprises a first clamp device for clamping to a clamp control voltage supplied from an external source by a horizontal clamp pulse and a second clamp device for controlling the DC potential of the television signal by adding the externally-supplied control voltage to an input television signal. The first clamp device is used during the period requiring an early clamp start, and the second clamp device is operated under normal conditions.
摘要翻译： 一种用于电视信号的夹紧系统包括用于通过水平钳位脉冲钳位到由外部源提供的钳位控制电压的第一钳位装置和用于通过将外部提供的控制电压相加来控制电视信号的直流电位的第二钳位装置 输入电视信号。 在需要早期夹紧启动的期间中使用第一夹紧装置，并且第二夹紧装置在正常条件下操作。
-
公开(公告)号：US4970594A
公开(公告)日：1990-11-13
申请号：US314102
申请日：1989-02-23
摘要： A television video signal control system is disclosed in which an amplitude control signal and a clamp voltage control signal digitally detected in the automatic gain control and clamp voltage control of a television signal receiver respectively are applied alternately to a single D/A converter. The resulting analog signal is sampled and held alternately at holding circuits corresponding to the two control signals. A D/A converter for converting the two control signals from digital to analog state is thus saved as compared with the prior art.
摘要翻译： 公开了一种电视视频信号控制系统，其中分别将电视信号接收机的自动增益控制和钳位电压控制中数字检测的幅度控制信号和钳位电压控制信号交替施加到单个D / A转换器。 所得到的模拟信号在对应于两个控制信号的保持电路处交替采样和保持。 因此与现有技术相比，可以节省用于将两个控制信号从数字转换为模拟状态的D / A转换器。
-
公开(公告)号：US4891699A
公开(公告)日：1990-01-02
申请号：US314088
申请日：1989-02-23
申请人： Masanori Hamada , Takeshi Inoue , Mitsuo Isobe , Yuichi Ninomiya , Yoshimichi Ohtsuka , Yoshinori Izumi
发明人： Masanori Hamada , Takeshi Inoue , Mitsuo Isobe , Yuichi Ninomiya , Yoshimichi Ohtsuka , Yoshinori Izumi
摘要： When the receiving system for a band-compression image signal receives a dropout signal representing a dropout portion of an image signal, an output of the third delay circuit of the temporal filter for motion detection processing, that is, motion information of an image signal, which precedes by one field, and a dropout signal activate the signal selection control circuit to produce an output signal for controlling the operation of the signal selection circuit, so that an output signal of the first delay circuit is selected for a static portion of an image, and an output signal of the dropout compensation circuit is selected for a moving portion of an image, so as to effect compensation control of the dropout portion of an image signal, thereby preventing deterioration of the quality of an image.
摘要翻译： 当带式压缩图像信号的接收系统接收到表示图像信号的压差部分的压差信号时，用于运动检测处理的时间滤波器的第三延迟电路的输出，即图像信号的运动信息， 其前置一个场，并且一个丢失信号激活信号选择控制电路以产生用于控制信号选择电路的操作的输出信号，使得第一延迟电路的输出信号被选择用于图像的静态部分 ，并且为图像的运动部分选择压差补偿电路的输出信号，以便实现图像信号的压差部分的补偿控制，从而防止图像质量的劣化。
-
公开(公告)号：US4757272A
公开(公告)日：1988-07-12
申请号：US880836
申请日：1986-07-01
IPC分类号： H04L27/227 , H03D3/18 , H03D3/24 , H03K9/04 , H04L7/04
CPC分类号： H04L27/2277
摘要： A demodulator for regenerating and demodulating a carrier signal from a four-phase PSK received signal having a data symbol preamble and a fixed phase (one of four phases) of a particular time width using a synchronous detection type demodulating system (remodulation type demodulating system). The demodulator includes an orthogonal demodulating circuit and a remodulating circuit for regenerating a carrier signal which is the data signal during a preamble transmission period from a received modulated signal. The remodulating circuit includes a demodulator having an AFC circuit for detecting a frequency change using a narrow band filter, means for suppressing frequency changes of the four-phase PSK modulated signal received and means for rendering constant the frequency of the regenerated carrier signal passing through the narrow band filter.
摘要翻译： 一种用于使用同步检测型解调系统（再调制型解调系统）从具有数据符号前导码和特定时间宽度的固定相位（四相一个）的四相PSK接收信号再生和解调载波信号的解调器， 。 解调器包括正交解调电路和再生电路，用于在从接收的调制信号的前导码传输周期期间再生作为数据信号的载波信号。 再调制电路包括具有用于使用窄带滤波器检测频率变化的AFC电路的解调器，用于抑制接收的四相PSK调制信号的频率变化的装置，以及用于使再生的载波信号的频率恒定的装置， 窄带滤波器。
-
9.发明授权Divisionally time-compressed subsample transmission and motion-compensated reproduction system for a high definition color television picture signal 失效用于高分辨率彩色电视图像信号的分时间压缩子采样传输和运动补偿再现系统
公开(公告)号：US4745459A
公开(公告)日：1988-05-17
申请号：US33878
申请日：1987-04-02
CPC分类号： H04N11/006 , H04N7/12
摘要： A high definition color television picture signal is unified by time-axis compressed integration (TCI) and the bandwidth thereof is extremely narrowed by dot-interlace subsampling. As a result, a narrow band transmission picture signal accompanied with a control signal adapted to the restoration of the received original picture signal, which is suitable for satellite broadcast, can be obtained through a comparatively simple arrangement. The received narrow band transmission picture signal can be restored by the interpolation adapted respectively to the stationary picture and the motion picture under control of the control signal or the picture-motional information detected from the received picture signal in combination with the control signal, so that the original high definition can be sufficiently maintained through comparatively simple receiving equipment.
摘要翻译： 高分辨率彩色电视图像信号通过时间轴压缩积分（TCI）统一，其带宽由点间隔二次采样极大地缩小。 结果，可以通过相对简单的布置来获得伴随适用于恢复接收到的原始图像信号的适合于卫星广播的控制信号的窄带传输图像信号。 控制信号或从接收到的图像信号检测到的图像运动信息与控制信号相结合，分别适应于静止图像和运动图像的接收窄带传输图像信号可以恢复，从而 通过比较简单的接收设备可以充分保持原有的高分辨率。
-
公开(公告)号：US4692801A
公开(公告)日：1987-09-08
申请号：US863232
申请日：1986-05-14
CPC分类号： H04N11/02 , H04N7/0152
摘要： In a bandwidth compressed transmission system in which a frequency band of a television signal of 2:1 interlace system is compressed, on an encoder side, by interfield offset subsampling at a first sampling frequency corresponding to a substantially upper limit frequency of the television signal and, after an output signal thus subsampled is applied to a LPF for passing a signal component having an aliased portion resulting from the interfield offset subsampling and having a cut-off frequency substantially equal to one half of the first sampling frequency, by interframe offset subsampling at a second sampling frequency lower than the first sampling frequency and higher than one half of the first sampling, so that a multiplexed subsampled transmission signal which does not include an aliased portion of reverse phase results from the interframe offset subsampling. When decoding, interframe interpolation processing of a multiplexed subsampled transmission signal is performed to obtain a signal for a still picture portion, while intrafield interpolation processing of the same transmission signal is performed to obtain a signal for a motion picture portion. An interframe difference of the transmission signal is detected to obtain a motion detection signal. The signals for still and motion picture are linearly mixed in accordance with the motion detection signal. Motion can be detected completely by utilizing an interframe difference. An arrangement of a receiver can be made simple and improves picture quality.
摘要翻译： 在压缩2:1隔行扫描系统的电视信号的频带的带宽压缩传输系统中，在编码器侧通过对应于电视信号的实质上限频率的第一采样频率的场间偏移二次采样，以及 在将这样二次采样的输出信号应用于LPF之后，通过帧间偏移次采样来通过具有由场间偏移次采样得到的混叠部分的信号分量并具有基本上等于第一采样频率的一半的截止频率 第二采样频率低于第一采样频率并且高于第一采样的一半，使得不包括反相的混叠部分的多路复用二次采样传输信号来自帧间偏移次采样。 当解码时，执行多路复用二次采样发送信号的帧间插值处理，以获得用于静止图像部分的信号，同时执行相同发送信号的场内插值处理以获得运动图像部分的信号。 检测发送信号的帧间差异以获得运动检测信号。 用于静止和运动图像的信号根据运动检测信号被线性混合。 运动可以通过利用帧间差异来完全检测。 可以使接收机的布置简单并且提高图像质量。
-
-
-
-
-
-
-
-
-
搜索结果
13 条记录 (耗时 0.029 秒)