Two-way data communication method and two-way data communication

Cryptography – Particular algorithmic function encoding – Nbs/des algorithm

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34082534, 348 13, 348 12, 348 1, 455 51, H04N 7167, H04N 714, H04N 700

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active

058870628

ABSTRACT:
The invention relates to a two-way data communication apparatus in television broadcast or data broadcast signal transmitted through telephone circuit, and a two-way data communication apparatus according to this method, and more particularly, in a system having a response server and an individual information server connected to a telephone circuit, the apparatus comprises data broadcast decoder means for decoding television broadcast or data broadcast signal transmitted through telephone circuit, display means for displaying the information of television broadcast or data broadcast, and a modem connected to the telephone circuit, and moreover by installing user information control means for controlling the individual information server, the individual information can be controlled exclusively, and by registering, updating, collating and confirming it securely, efficient keeping of user information and confidence are achieved, and problems in two-way communication are prevented.

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Szurkowski et al., "Interactive multimedia services for consumers and businesses", AT&T Technical Journal, vol. 74, No. 5, Sep. 1995-Oct. 1995, pp. 117-129.
Deloddere et al., "Interactive video on demand", IEEE Communications Magazine, vol. 32, No. 5, May 1, 1994, pp. 82-88.
European Search Report for Int'l Appln No. 96118345.6 dated Dec. 23, 1997.

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