Hard Encrypted Video And Audio Television System (1986)
By Michael F. Jeffers, Joseph B. Glaab And John T. Griffin, General Instrument Corporation
There are many considerations involved in the design of a truly secure scrambled television signal. In the encoded mode, recognition of any portion of the original video and audio signals must be obliterated by the scrambling method. The recovery of both these signals must be protected by encryption techniques developed within a robust transmission system. The circuitry to reconstruct the signals must be reliable and consistent; and its cost must be in line with the benefit. Above all, the quality of the descrambled signals must match the original. We are confident that we have achieved these goals. In the following paragraphs we will discuss the problem areas and our solutions.
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