METHOD FOR SCRAMBLING PAL, SECAM AND NTSC COMPOSITE VIDEO SIGNALS AND DECODER FOR UNSCRAMBLING SAID SIGNALS

摘要

method of scrambling video signals 11 composite pal secam and ntsc signals by the trouble and subtext decoder process method of the invention is to change (a) the beginning of the embrouila set of composite video line of a picture image at the start of the useful part of the line. figure 2.