Method and system for secure transmission and reception of video information, particularly for television
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 20, 1983
Issued Date -
N/A
app pub date -
Mar 3, 1982
filing date -
Feb 25, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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 successive 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.
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