Data encoding/decoding circuit

Communications: electrical – Audible indication – Percussion-type sound producer

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380 46, H04L 900

Patent

active

046896066

ABSTRACT:
In a data encoding/decoding circuit, a data encoding circuit includes a first clock, a first time setting circuit, a first random number generator, and a converter for receiving transmission data and converting the transmission data into output data with frame sync signals. A data decoding circuit includes a second clock, a second time setting circuit, a frame sync extracting circuit, a time correction circuit for correcting the time of the second clock, a second random number generator, and an inverter for inverting output data from the frame sync extracting circuit with a random number from the second random number generator and outputting the inverted data as decoded data.

REFERENCES:
patent: 3852534 (1974-12-01), Tilk
patent: 4202051 (1980-05-01), Davida
patent: 4369434 (1983-01-01), Mueller
"Privacy and Authentication: An Introduction to Cryptography", Proceedings of the IEEE, vol. 67, No. 3, Mar. 1979.
"Data Encryption Equipment", Sep. 1984-vol. 22, No. 9.

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