公开(公告)号：US5343528A

公开(公告)日：1994-08-30

申请号：US28652

申请日：1993-03-09

申请人： Ari Heikkinen

发明人： Ari Heikkinen

IPC分类号： H04N5/782 ,  H04N7/167

CPC分类号： H04N5/782

摘要： A procedure and a decoder for decrypting the encryption of a coded video signal at a given point of time, in which the decoder (1) is tuned to a given receive channel for a given point of time using the channel and timer system of a video recorder (2) electrically in conjunction with the decoder by means of a video connection (VIDEO). The decoder (1) is tuned to a home channel while in a stand-by, whereby it receives data from the home channel. The mode of the input (IN1) of the video connection of the decoder is detected, and if a video signal is detected to approach from the video connection (IN1), said video signal from the video connection (IN1) is coupled to the decryption circuits (7) of the decoder. When the entry of the video signal from the video connection (IN1) ends, a signal from the home channel is coupled to the decryption circuits (7) of the decoder.

摘要翻译： 一种用于在给定时间点解码编码视频信号的加密的过程和解码器，其中使用视频的信道和定时器系统将解码器（1）调谐到给定时间点的给定接收信道 记录器（2）通过视频连接（VIDEO）与解码器电连接。 解码器（1）在待机状态下被调谐到归属通道，由此从主通道接收数据。 检测解码器的视频连接的输入（IN1）的模式，并且如果视频信号被检测为从视频连接（IN1）接近，则来自视频连接（IN1）的所述视频信号被耦合到解密 电路（7）。 当来自视频连接（IN1）的视频信号的输入结束时，来自归属通道的信号被耦合到解码器的解密电路（7）。