首页> 外国专利> PROCESS TO RECOVER VERTICAL DETAIL IN NTSC TELEVISION DECODING, PROCESS TO MODIFY STANDARD TELEVISION SIGNAL, PROCESS TO PROVIDE A NON-STANDARD VIDEO SIGNAL, SYSTEM TO DECIFY NON-STEP PROCEDURE VIDEO SIGNALS TO DELETE A VIDEO SIGNAL, ENCODER, DECROSSER, PROCESS TO CROSS VIDEO SIGNS, SYSTEM TO CROSS VERTICALLY VIDEO SIGNS, PROCESS AND SYSTEM TO SUPPRESS THE PRESENCE OF HORIZONTAL DELETION, AND PROCESS TO CROSS VIDEO SIGNALS

PROCESS TO RECOVER VERTICAL DETAIL IN NTSC TELEVISION DECODING, PROCESS TO MODIFY STANDARD TELEVISION SIGNAL, PROCESS TO PROVIDE A NON-STANDARD VIDEO SIGNAL, SYSTEM TO DECIFY NON-STEP PROCEDURE VIDEO SIGNALS TO DELETE A VIDEO SIGNAL, ENCODER, DECROSSER, PROCESS TO CROSS VIDEO SIGNS, SYSTEM TO CROSS VERTICALLY VIDEO SIGNS, PROCESS AND SYSTEM TO SUPPRESS THE PRESENCE OF HORIZONTAL DELETION, AND PROCESS TO CROSS VIDEO SIGNALS

机译：在NTSC电视解码中恢复垂直详细信息的过程，修改标准电视信号的过程，提供非标准视频信号的过程，用于确定非临时性过程视频信号的系统，用于删除视频的信息，用于还原视频信号的信号，标志，用于垂直交叉显示的系统，用于抑制水平偏离的过程和系统以及用于交叉显示视频的过程

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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. IMAGE

机译：视频加扰系统在视频帧的有效部分的位置中引起随机摆动，即时移，而不影响每个视频行中的水平同步信号和色同步，从而提供安全性和隐蔽性。通过用合成的视频信号填充活动视频的标称开始与活动视频的实际开始之间的间隙来增强安全性，该合成视频信号使用数字生成的填充模式复制相邻的活动视频。而且，随机噪声叠加还掩盖了间隙的位置。通过使用一个或两个频率及时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，可以提供额外的隐藏。通过仅使用两个通道，色度和亮度，以及通过用于色度稳定性的外差电路，简化了根据本发明的NTSC数字编码。通过使用色度通道提供通常丢失的细节，可以增强NTSC编码。另外，可以在水平消隐的前沿的非标准视频信号上提供一部分色同步信号，从而允许使用相对简单的解码器。 <图像>

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公开/公告号BR9204414A

专利类型
公开/公告日1993-05-25

原文格式PDF
申请/专利权人 MACROVISION CORPORATION;
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申请/专利号BR19929204414
发明设计人 JOHN O. RYAN;RONALD QUAN;JAMES R. HOLZGRAFE;PETER J. WONFOR;
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申请日1992-11-16
分类号H04N9/82;
国家 BR
入库时间 2022-08-22 05:12:29

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