公开(公告)号：US5579390A

公开(公告)日：1996-11-26

申请号：US400832

申请日：1995-03-08

申请人： John O. Ryan ,  Ronald Quan ,  James R. Holzgrafe ,  Peter J. Wonfor

发明人： John O. Ryan ,  Ronald Quan ,  James R. Holzgrafe ,  Peter J. Wonfor

IPC分类号： H04H20/00 ,  H04K1/00 ,  H04K1/02 ,  H04L9/00 ,  H04N7/169

CPC分类号： H04N7/1696 ,  H04N7/1693

摘要： A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line, thus providing both security and concealment. The security is enhanced by filling in the gap between the nominal beginning of active video and the actual beginning of active video with a synthesized video signal which replicates the adjacent active video using a digitally generated filling pattern. Also, a random noise overlay further conceals the location of the gap. Additional concealment is provided by wiggling in time the location of the horizontal sync signal using one or two frequencies and also by randomly altering the location of the vertical sync signal. The NTSC digital encoding in accordance with the invention is simplified by using only two channels, chrominance and luminance, and by a heterodyne circuit for chrominance stability. NTSC encoding is enhanced by providing detail normally lost, by use of the chroma channel. Additionally, a non-standard video signal may be provided with a portion of the colorburst on the front porch of the horizontal blanking, thus allowing use of a relatively simple decoder.

摘要翻译： 视频加扰系统在视频帧的有效部分的位置处引起随机摆动，即时移，而不影响每个视频行中的水平同步信号和色突，从而提供安全性和隐藏性。 通过使用使用数字生成的填充模式复制相邻活动视频的合成视频信号，填充活动视频的标称开始与有效视频的实际开始之间的间隙来增强安全性。 此外，随机噪声叠加进一步隐藏间隙的位置。 通过使用一个或两个频率在时间上摆动水平同步信号的位置并且还通过随机改变垂直同步信号的位置来提供额外的隐藏。 根据本发明的NTSC数字编码通过仅使用两个通道，色度和亮度以及通过外差电路来实现色度稳定性被简化。 通过使用色度通道提供通常丢失的细节来增强NTSC编码。 此外，非标准视频信号可以在水平消隐的前沿上提供一部分色彩，从而允许使用相对简单的解码器。

公开(公告)号：US5438620A

公开(公告)日：1995-08-01

申请号：US202349

申请日：1994-02-28

申请人： John O. Ryan ,  Ronald Quan ,  James R. Holzgrafe ,  Peter J. Wonfor

发明人： John O. Ryan ,  Ronald Quan ,  James R. Holzgrafe ,  Peter J. Wonfor

IPC分类号： H04H20/00 ,  H04K1/00 ,  H04K1/02 ,  H04L9/00 ,  H04N7/169 ,  H04N7/167

CPC分类号： H04N7/1696 ,  H04N7/1693

摘要： A video-scrambling system induces a random wobble i.e., time shifting, in the location of active portion of the video frame, without affecting the horizontal sync signal and colorburst in each video line, thus providing both security and concealment. The security is enhanced by filling in the gap between the nominal beginning of active video and the actual beginning of active video with a synthesized video signal which replicates the adjacent active video using a digitally generated filling pattern. Also, a random noise overlay further conceals the location of the gap. Additional concealment is provided by wiggling in time the location of the horizontal sync signal using one or two frequencies and also by randomly altering the location of the vertical sync signal. The NTSC digital encoding in accordance with the invention is simplified by using only two channels, chrominance and luminance, and by a heterodyne circuit for chrominance stability. NTSC encoding is enhanced by providing detail normally lost, by use of the chroma channel. Additionally, a non-standard video signal may be provided with a portion of the colorburst on the front porch of the horizontal blanking, thus allowing use of a relatively simple decoder.

摘要翻译： 视频加扰系统在视频帧的有效部分的位置处引起随机摆动，即时移，而不影响每个视频行中的水平同步信号和色突，从而提供安全性和隐藏性。 通过使用使用数字生成的填充模式复制相邻活动视频的合成视频信号，填充活动视频的标称开始与有效视频的实际开始之间的间隙来增强安全性。 此外，随机噪声叠加进一步隐藏间隙的位置。 通过使用一个或两个频率在时间上摆动水平同步信号的位置并且还通过随机改变垂直同步信号的位置来提供额外的隐藏。 根据本发明的NTSC数字编码通过仅使用两个通道，色度和亮度以及通过外差电路来实现色度稳定性被简化。 通过使用色度通道提供通常丢失的细节来增强NTSC编码。 此外，非标准视频信号可以在水平消隐的前沿上提供一部分色彩，从而允许使用相对简单的解码器。

公开(公告)号：US4937679A

公开(公告)日：1990-06-26

申请号：US210665

申请日：1988-06-23

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： G11B15/02 ,  G11B5/027 ,  G11B20/00 ,  G11B20/02 ,  G11B27/024 ,  G11B27/028 ,  H04N5/913

CPC分类号： G11B20/00688 ,  G11B20/00086 ,  G11B20/00702 ,  G11B27/028 ,  H04N5/913 ,  G11B2220/455 ,  G11B2220/90 ,  G11B2220/91 ,  G11B27/024 ,  H04N2005/91314

摘要： A method and apparatus are described for preventing a dual deck video recorder from being used to record a copy-protected video signal. A switch is included on the recorder to indicate whether a video signal input to one of the deck locations for recording originates externally of the machine or internally at another deck location. Recording is prevented whenever the switch indicates that the video signal originates from the other deck location if the video signal at such location includes a selected copy-protect signal. If a video signal to be recorded comes from externally of the machine, copying of the same is prevented if (1) the video signal includes the copy-protect signal; or (2) the video signal to be copied is the same as the play back video signal and the latter has the selected copy-protect signal.

摘要翻译： 描述了一种用于防止双层录像机用于记录受拷贝保护的视频信号的方法和装置。 记录器上包括一个开关，用于指示输入到一个记录位置的视频信号是从机器的外部还是在另一个甲板位置的内部。 只要交换机指示视频信号来自另一台甲板位置，如果这样的位置处的视频信号包括所选择的复制保护信号，则防止记录。 如果要记录的视频信号来自机器的外部，则如果（1）视频信号包括复制保护信号，则防止其复制; 或（2）要复制的视频信号与播放视频信号相同，后者具有选择的复制保护信号。

公开(公告)号：US4916736A

公开(公告)日：1990-04-10

申请号：US203676

申请日：1988-06-07

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H04K1/00 ,  H04N5/913 ,  H04N7/169

CPC分类号： H04N7/1693 ,  H04N5/913 ,  H04N2005/91364

摘要： Time sequential information signals, such as color video signals having a line timing reference and an active video portion, are encrypted by time shifting the active video signal portion towards and away from the line timing reference signal in psuedo-random fashion prior to broadcasting or recording on tape or disk and transmittal to the user. The signals are decrypted by an inverse time shifting technique. By limiting the amount of time shifting between lines, potential signal degradation for color video signals is minimized, and drop out compensation processing is minimally affected, so that the color resolution and picture quality are substantially unaffected.Various levels of security are attainable, ranging from a simple security technique in which the intra field time shifting information is encoded along with the active video to a relatively sophisticated, high security level in which the number of decryption signal processing attempts and the time period within which decryption processing is permitted are limited.

公开(公告)号：US4314184A

公开(公告)日：1982-02-02

申请号：US127163

申请日：1980-03-04

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H04N3/16 ,  H03K4/69 ,  H03K6/02 ,  H01J29/70

CPC分类号： H03K4/693 ,  H03K6/02

摘要： A deflection coil driver includes a current driver stage comprising three power transistors, a first power transistor being caused to turn on via a class B transistor stage when an input signal of a first polarity is input to the class B stage, second and third power transistors being caused to turn on via said class B stage when the input signal has an opposite polarity. When turned on, the first power transistor couples current from a positive voltage source to the deflection coil, the second power transistor couples current from a negative voltage source to said coil, and the third power transistor couples said coil to ground. A transistor switch determines whether the second or the third power transistor is on, as a function of the voltage across the deflection coil. The current through the coil is also sensed and provides negative feedback to an input amplifier to ensure that the shape of such current matches the shape of the input signal.

摘要翻译： 偏转线圈驱动器包括具有三个功率晶体管的电流驱动器级，当第一极性的输入信号被输入到B类阶段时，经由B类晶体管级导通的第一功率晶体管，第二和第三功率晶体管 当输入信号具有相反的极性时，经由所述B级阶段导通。 当接通时，第一功率晶体管将来自正电压源的电流耦合到偏转线圈，第二功率晶体管将电流从负电压源耦合到所述线圈，并且第三功率晶体管将所述线圈耦合到地。 晶体管开关确定第二或第三功率晶体管是否导通，作为偏转线圈两端的电压的函数。 还感测到通过线圈的电流并向输入放大器提供负反馈以确保这种电流的形状与输入信号的形状匹配。

公开(公告)号：US4309723A

公开(公告)日：1982-01-05

申请号：US140281

申请日：1980-04-14

申请人： John O. Ryan ,  Joseph L. Corkery ,  Edward P. Sudyka ,  Gerow D. Brill ,  Anne M. Reagan ,  James R. Holzgrafe

发明人： John O. Ryan ,  Joseph L. Corkery ,  Edward P. Sudyka ,  Gerow D. Brill ,  Anne M. Reagan ,  James R. Holzgrafe

IPC分类号： H04N5/16 ,  H04N9/093 ,  H04N5/14 ,  H04N5/22

CPC分类号： H04N5/217

摘要： Precise, point-by-point correction of spatial and shading errors in a camera television picture are performed manually. The errors to be corrected are determined by visually examining a picture on a video monitor, by selecting an area for error correction which area corresponds to the type and extent of the specific error selected for correction. A position command increments or decrements an address by preselected steps to locate a movable "cursor" which, in turn, identifies the area being corrected. A correction command retrieves the data from the area identified, and which contains the error, selectively increments or decrements the data in preselected steps, and stores the new data back in memory. The process continues until the operator is satisfied with the correction results. Correction thus may be made point-by-point, along horizontal or vertical lines or areas, in selected corner areas, etc., of the picture.

摘要翻译： 手动执行相机电视图像中的空间和阴影错误的精确的逐点校正。 要校正的错误是通过视觉检查视频监视器上的图像来确定的，通过选择用于纠错的区域，该区域对应于选择用于校正的特定错误的类型和范围。 位置命令通过预先选择的步骤来增加或减少地址，以定位可移动的“光标”，其又标识正被校正的区域。 校正命令从识别的区域检索数据，并且包含该错误，以预选步骤选择性地增加或减少数据，并将新数据存储回存储器中。 该过程一直持续到操作者对校正结果满意。 因此，可以沿着水平或垂直线或区域，在图片的所选角落区域等逐点进行校正。

公开(公告)号：US4284960A

公开(公告)日：1981-08-18

申请号：US96727

申请日：1979-11-23

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H03F1/34 ,  H03F3/08 ,  H04N5/14 ,  H03F3/16

CPC分类号： H03F3/082

摘要： A light emitting diode is modulated by the output signal of a F.E.T. amplifier, and the resulting light signal is fed back to the amplifier input via an optical fiber and a light detecting photo diode. Thus, current feedback is achieved with very flat frequency response over a full frequency band by modulating a light emitting diode with the preamplifier output signal, reconverting the resultant radiation to an electrical signal, which is then fed back to the preamplifier input.

摘要翻译： 发光二极管由F.E.T.的输出信号调制。 放大器，并且所得到的光信号经由光纤和光检测光电二极管反馈到放大器输入端。 因此，通过利用前置放大器输出信号调制发光二极管，在全频带上具有非常平坦的频率响应来实现电流反馈，将所得辐射重新转换为电信号，然后将其反馈到前置放大器输入。

公开(公告)号：US4229767A

公开(公告)日：1980-10-21

申请号：US23512

申请日：1979-03-23

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H04N5/228 ,  H04N5/197 ,  H04N9/09

CPC分类号： H04N5/2283

摘要： A beam control circuit which instantaneously increases beam current just sufficiently to discharge a highlight, utilizes the fact that a substantially linear relationship exists between the grid current and the available beam current of a diode-gun camera tube. A tube grid control circuit provides means for calibrating the relationship between the incoming signal current and the available beam current. A highlight enable circuit coupled to the grid control circuit is pre-biased whereby the beam current of the tube is maintained at a constant value as long as the video signal current remains within its normal operating range, i.e., there are no highlights in the viewed scene. However, when the video signal current increases above the pre-bias level, as in the presence of a highlight, the highlight enable circuit conducts to cause a corresponding increase in the beam current of the tube, wherein the beam current maintains a pre-calibrated, substantially constant margin above the video signal current which is just sufficient to discharge the highlight.

摘要翻译： 瞬时增加光束电流的光束控制电路恰好足以释放高光，利用了二极管枪相机管的电网电流和可用束电流之间存在基本线性关系的事实。 管栅控制电路提供用于校准输入信号电流和可用束电流之间的关系的装置。 耦合到电网控制电路的高亮使能电路被预偏置，由此只要视频信号电流保持在其正常工作范围内，即管子的束电流保持在恒定值，即，在观察中没有亮点 现场。 然而，当视频信号电流增加到高于预偏置电平时，如存在亮点，高亮使能电路导致管的束电流的相应增加，其中光束电流保持预校准 ，高于视频信号电流的基本恒定的余量，这足以释放亮点。

公开(公告)号：US08014524B2

公开(公告)日：2011-09-06

申请号：US12815291

申请日：2010-06-14

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H04N7/167 ,  H04L9/32 ,  H04N7/08 ,  G06T1/00 ,  G06F12/00 ,  G06Q30/00 ,  G06Q10/00

CPC分类号： G06T1/0064 ,  H04N19/00 ,  H04N21/23892 ,  H04N21/8358

摘要： A robust technique to prevent illicit copying of video information notwithstanding the use of image scaling. A watermark is embedded into the video signal (e.g., DVD's content or other video sources) at different scales (i.e., sizes). The watermark is maintained at each scale for a predetermined time duration that is sufficient to allow the detector circuit in a DVD-recorder, DVHS recorder, DVCR, or any other digital format recorder to detect, extract, and process information contained in the watermark. At the end of the predetermined time duration, the watermark is changed to a different scale preferably on a pseudo-random basis to ensure that each one of all the scales in a predetermined scaling range is achieved a predetermined number of times. Thereby the recorder shuts off a number of times during play of the content, each time the detector circuit senses the watermark.

摘要翻译： 尽管使用图像缩放，仍然可以防止非法复制视频信息。 将水印以不同的尺度（即尺寸）嵌入到视频信号（例如，DVD的内容或其他视频源）中。 水印被保持在每个刻度上一段预定的持续时间，足以允许DVD记录器，DVHS记录器，DVCR或任何其它数字格式记录器中的检测器电路检测，提取和处理包含在水印中的信息。 在预定持续时间结束时，优选地以伪随机的方式将水印改变为不同的比例，以确保预定缩放范围内的所有尺度中的每一个都达到预定次数。 因此，每次检测器电路感测到水印时，记录器在播放内容期间关闭多次。

公开(公告)号：US07764790B2

公开(公告)日：2010-07-27

申请号：US10703681

申请日：2003-11-07

申请人： John O. Ryan

发明人： John O. Ryan

IPC分类号： H04N7/167 ,  H04L9/32 ,  H04N7/08 ,  G06T1/00 ,  G06F12/00

CPC分类号： G06T1/0064 ,  H04N19/00 ,  H04N21/23892 ,  H04N21/8358

摘要： A robust technique to prevent illicit copying of video information notwithstanding the use of image scaling. A watermark is embedded into the video signal (e.g., DVD's content or other video sources) at different scales (i.e., sizes). The watermark is maintained at each scale for a predetermined time duration that is sufficient to allow the detector circuit in a DVD-recorder, DVHS recorder, DVCR, or any other digital format recorder to detect, extract, and process information contained in the watermark. At the end of the predetermined time duration, the watermark is changed to a different scale preferably on a pseudo-random basis to ensure that each one of all the scales in a predetermined scaling range is achieved a predetermined number of times.

摘要翻译： 尽管使用图像缩放，仍然可以防止非法复制视频信息。 将水印以不同的尺度（即尺寸）嵌入到视频信号（例如，DVD的内容或其他视频源）中。 水印被保持在每个刻度上一段预定的持续时间，足以允许DVD记录器，DVHS记录器，DVCR或任何其它数字格式记录器中的检测器电路检测，提取和处理包含在水印中的信息。 在预定持续时间结束时，优选地以伪随机的方式将水印改变为不同的比例，以确保预定缩放范围内的所有尺度中的每一个都达到预定次数。