公开(公告)号：US20120194746A1

公开(公告)日：2012-08-02

申请号：US13417798

申请日：2012-03-12

申请人： RAYMOND WILLIAM HALL ,  DONALD E. PARRECO

发明人： RAYMOND WILLIAM HALL ,  DONALD E. PARRECO

IPC分类号： H04N5/16

CPC分类号： H04N9/72

摘要： A feedback circuit for restoration of DC in electrical signals is presented. A sample pulse representing a DC portion of an electrical signal is generated. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the electrical signal during this DC portion. The offset voltage feeds back through a summing node to the electrical signal thereby restoring the video signal to the desired DC voltage level with respect to ground.

摘要翻译： 提出了一种用于恢复电信号中DC的反馈电路。 产生表示电信号的DC部分的采样脉冲。 采样脉冲触发采样和保持电路以在该DC部分期间获取电信号中的正确偏移电压。 偏移电压通过加法节点反馈到电信号，从而将视频信号恢复到相对于地面的期望的DC电压电平。

公开(公告)号：US20080106643A1

公开(公告)日：2008-05-08

申请号：US11557938

申请日：2006-11-08

申请人： RAYMOND WILLIAM HALL ,  GARY DEAN COLE ,  Donald E. Parreco

发明人： RAYMOND WILLIAM HALL ,  GARY DEAN COLE ,  Donald E. Parreco

IPC分类号： H04N11/06 ,  H04N5/38 ,  H04N7/04

CPC分类号： H04N7/108 ,  H04B3/10 ,  H04L25/0272 ,  H04L25/0296

摘要： A system capable of transmitting and receiving high frequency video signals across various lengths of a twisted pair cable while maintaining video quality is presented. The system includes a transmitter and a receiver tandem coupled together over twisted pair cable. Each video component is mixed with a reference signal in the transmitter and driven differentially onto the twisted pair cable. Upon detection of a signal in the twisted pair cable, the receiver adjusts its internal gains until the known characteristic of the reference signal is achieved. The receiver than automatically adjusts the skew & DC offset. Thus, the receiver is able to automatically measure the degradation in video quality and appropriately compensate the video signals for the accumulated degradation caused primarily by the transmission between the transmitter and the receiver. The compensated video may subsequently be provided to a video display device.

摘要翻译： 提出了能够在保持视频质量的同时在双绞线电缆的各种长度上发送和接收高频视频信号的系统。 该系统包括通过双绞线电缆耦合在一起的发射器和接收器。 每个视频组件与发射机中的参考信号混合，并且差分地驱动到双绞线上。 当检测到双绞线电缆中的信号时，接收机调整其内部增益，直到达到参考信号的已知特性。 接收机自动调整偏移和直流偏移。 因此，接收机能够自动测量视频质量的劣化，并且适当地补偿主要由发射机和接收机之间的传输引起的累积衰落的视频信号。 随后可以将补偿的视频提供给视频显示设备。

公开(公告)号：US20110063507A1

公开(公告)日：2011-03-17

申请号：US12847971

申请日：2010-07-30

申请人： RAYMOND WILLIAM HALL

发明人： RAYMOND WILLIAM HALL

IPC分类号： H04N5/46

CPC分类号： H04N7/0102

摘要： A video format identification system includes a master clock circuit which provides timing and counting signals, a synchronization activity detector operatively coupled to the master clock circuit, and a synchronization width qualifier configured to filter out noise or reference burst signals from showing up as sync signals. The system also includes a synchronization detector which regulates the rate of the incoming sync signal, a color burst sampler providing a window for sampling a reference color burst after the sync signal has occurred, and a color burst detector which looks for at least three transitions from a burst signal before it qualifies the as an appropriate reference color burst. A format sample timer generates sample clock signals. A format sample counter produces “take format” signals which are utilized by a set of format counter. The system further includes a video format identifier which enables a particular video format to be directed to a respective video connector.

摘要翻译： 视频格式识别系统包括提供定时和计数信号的主时钟电路，可操作地耦合到主时钟电路的同步活动检测器，以及被配置为滤除噪声或参考突发信号从而显示为同步信号的同步宽度限定器。 该系统还包括调节输入同步信号的速率的同步检测器，在同步信号发生之后提供用于采样参考彩色脉冲串的窗口的彩色脉冲串采样器以及寻找至少三个转换的色同步检测器 之前的突发信号被认定为适当的参考颜色突发。 格式采样定时器产生采样时钟信号。 格式采样计数器产生由一组格式计数器使用的“采用格式”信号。 该系统还包括使特定视频格式被引导到相应的视频连接器的视频格式标识符。

公开(公告)号：US20110128447A1

公开(公告)日：2011-06-02

申请号：US12895545

申请日：2010-09-30

申请人： RAYMOND WILLIAM HALL

发明人： RAYMOND WILLIAM HALL

IPC分类号： H04N5/21

CPC分类号： H04N5/52 ,  H04N5/21 ,  H04N7/108 ,  H04N9/68

摘要： A method and apparatus for automatic reduction of noise in video signals transmitted over conductors is presented. The present invention provides an adjustable amount of noise filtering matched to the amount of gain provided by an adjustable gain amplifier to a received video signal. One or more stages of a multi-stage discrete gain amplifier is provided with a corresponding noise filter circuit. The filter circuit is matched to the frequency response of and the amount of gain provided by the discrete gain amplifier stage. When the amplifier stage is applied to the received signal, the corresponding noise filter for that stage is invoked as well. In that manner, the amount of noise filtering applied to a video signal automatically varies with the amount of amplification provided to that signal.

摘要翻译： 提出了一种通过导线传输的视频信号中自动降低噪声的方法和装置。 本发明提供了与可调节增益放大器对接收的视频信号所提供的增益量相匹配的可调整量的噪声滤波。 多级离散增益放大器的一个或多个级设置有相应的噪声滤波器电路。 滤波电路与离散增益放大器级的频率响应和增益量相匹配。 当放大器级应用于接收信号时，也会调用该级的相应噪声滤波器。 以这种方式，施加到视频信号的噪声滤波量自动随着提供给该信号的放大量而变化。