-
公开(公告)号：US20120194746A1
公开(公告)日：2012-08-02
申请号：US13417798
申请日：2012-03-12
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。
-
2.发明授权Method and apparatus for automatic compensation of video signal losses from transmission over conductors 有权用于自动补偿通过导体传输的视频信号损失的方法和装置公开(公告)号：US08330550B2
公开(公告)日：2012-12-11
申请号：US11309122
申请日：2006-06-23
摘要： A method and apparatus for automatic compensation of insertion loss in video signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of video over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a video signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the video signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.
摘要翻译： 提出了一种通过导体传输的视频信号中自动补偿插入损耗的方法和装置。 本发明特别适用于CAT-5或类似双绞线电缆长距离传输视频。 具有已知形式和强度的参考信号（例如脉冲信号）被提供给承载来自发射机到接收机的视频信号的分量的每对导体。 接收器包括用于每个导体对的可调增益放大器，在该导体对上传输视频信号的分量。 放大器的增益最初设置在初始电平（例如，它们的最大增益），以允许检测参考信号。 一旦在导体对中检测到参考信号，则调整放大器增益，使得参考信号的电平大致恢复到其原始形式和强度。
-
公开(公告)号：US08154664B2
公开(公告)日：2012-04-10
申请号：US12861316
申请日：2010-08-23
CPC分类号： H04N9/72
摘要： A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.
摘要翻译： 提出了视频信号中DC恢复的反馈电路。 从水平同步信号产生表示输入视频信号的后沿的采样脉冲。 采样脉冲触发采样和保持电路，以在后沿期间获取输出信号中的正确偏移电压。 偏移电压通过导致偏移的电路或输入放大器的上游的求和节点反馈，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：US07787057B2
公开(公告)日：2010-08-31
申请号：US11309558
申请日：2006-08-22
CPC分类号： H04N9/72
摘要： A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.
摘要翻译： 提出了视频信号中DC恢复的反馈电路。 从水平同步信号产生表示输入视频信号的后沿的采样脉冲。 采样脉冲触发采样和保持电路，以在后沿期间获取输出信号中的正确偏移电压。 偏移电压通过导致偏移的电路或输入放大器的上游的求和节点反馈，从而将视频信号恢复到相对于地面的期望的DC电压电平。
-
5.发明申请METHOD AND APPARATUS FOR VIDEO TRANSMISSION OVER LONG DISTANCES USING TWISTED PAIR CABLES 审中-公开使用双绞线的长距离视频传输的方法和装置公开(公告)号：US20080106643A1
公开(公告)日：2008-05-08
申请号：US11557938
申请日：2006-11-08
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：US20080062326A1
公开(公告)日：2008-03-13
申请号：US11309558
申请日：2006-08-22
IPC分类号： H04N9/72
CPC分类号： H04N9/72
摘要： A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.
摘要翻译： 提出了视频信号中DC恢复的反馈电路。 从水平同步信号产生表示输入视频信号的后沿的采样脉冲。 采样脉冲触发采样和保持电路，以在后沿期间获取输出信号中的正确偏移电压。 偏移电压通过导致偏移的电路或输入放大器的上游的求和节点反馈，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：US08634028B2
公开(公告)日：2014-01-21
申请号：US13417798
申请日：2012-03-12
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：US20110069236A1
公开(公告)日：2011-03-24
申请号：US12861316
申请日：2010-08-23
CPC分类号： H04N9/72
摘要： A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.
摘要翻译： 提出了视频信号中DC恢复的反馈电路。 从水平同步信号产生表示输入视频信号的后沿的采样脉冲。 采样脉冲触发采样和保持电路，以在后沿期间获取输出信号中的正确偏移电压。 偏移电压通过导致偏移的电路或输入放大器的上游的求和节点反馈，从而将视频信号恢复到相对于地面的期望的DC电压电平。
-
9.发明申请公开(公告)号：US20070300284A1
公开(公告)日：2007-12-27
申请号：US11309122
申请日：2006-06-23
IPC分类号： H04N7/16
摘要： A method and apparatus for automatic compensation of insertion loss in video signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of video over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a video signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the video signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.
摘要翻译： 提出了一种通过导体传输的视频信号中自动补偿插入损耗的方法和装置。 本发明特别适用于CAT-5或类似双绞线电缆长距离传输视频。 具有已知形式和强度的参考信号（例如脉冲信号）被提供给承载来自发射机到接收机的视频信号的分量的每对导体。 接收器包括用于每个导体对的可调增益放大器，在该导体对上传输视频信号的分量。 放大器的增益最初设置在初始电平（例如，它们的最大增益），以允许检测参考信号。 一旦在导体对中检测到参考信号，则调整放大器增益，使得参考信号的电平大致恢复到其原始形式和强度。
-
-
-
-
-
-
-
-
搜索结果
9 条记录 (耗时 0.015 秒)
