Apparatus for managing software using quantity

Details Apparatus for managing software using quantity Apparatus for managing software using quantity

1995-07-14

1998-12-08

Gregory, Bernarr E.

Cryptography

Cryptanalysis

380 9, 380 10, 380 20, 380 23, 380 25, 380 29, 380 49, H04L 900, H04L 906

Patent

active

058481540

ABSTRACT:
A DES decrypting unit decrypts video data frames encrypted and compressed based on MPEG standards, when receiving them. The decrypted video data frames are expanded one by one in a MPEG expansion circuit. Each time the single frame is expanded, the MPEG expansion circuit outputs a completion-of-frame-expansion signal to a host control CPU. The host control CPU counts the completion-of-frame-expansion signals and reduces an accounting count value in an accounting data memory in accordance with this count value. The host control CPU output character pattern image data from a pattern generator when the accounting count value becomes 0. The character pattern image data is superimposed on a video signal in an adder circuit.

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