H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/20
H04N 7/16 (2006.01) H04K 1/04 (2006.01) H04N 7/169 (2006.01)
Patent
CA 1182555
ABSTRACT OF THE DISCLOSURE A method and a system for secure transmission and reception of a video signal wherein parts of the video signal arranged in a first predetermined sequence are delayed in relation to each other to form an encoded video signal having its parts rearranged in sequence relative to their positions in the first predetermined sequence. Rearrangement of the video signal parts is accomplished by storing succes- sive parts of the video signal and retrieving the stored parts so that the transmitted video signal has in parts arranged in a sequence other than their normal sequence. A decoder at a remote location is provided for receiving and restoring the transmitted sequence of video signal parts to its original sequence. In a television scrambling system, the parts of the video signal are fields, lines or segments of lines and, rearrangement of the sequence of video signal parts is accomplished on a line segment, line or field basis. Codes may be transmitted to the remote location with the video signal or otherwise to indicate the manner in which the parts of the video signal have been rearranged.
371615
Block Robert S.
Martin John R.
Block Robert S.
Gowling Lafleur Henderson Llp
Martin John R.
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