Extended definition television transmission system

Details Extended definition television transmission system Extended definition television transmission system

1990-01-26

1991-09-03

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

358 12, 358141, H04N 7167

Patent

active

050460919

ABSTRACT:
Television picture transmission stage in which besides means for transmitting at least one picture characteristic extension video signal via at least one transmission path, means for scrambling at least a part of said extension signal or signals, and receiving stage comprising corresponding receiving and descrambling means. These stages are particularly intended for a television picture transmission system in which one or more video signals for extending the aspect ratio of the picture and the video signals for extending the horizontal and vertical definition of the said pictures are transmitted and transferred superposed on the conventional video signals which correspond to the original pictures, said extension signals having been submitted before transmission to a cyclic permutation from a cut point defined for each line with the aid of a pseudorandom sequence generator.

REFERENCES:
patent: 4908697 (1990-03-01), Tsinberg et al.

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