Full-field teletext system with dynamic addressability

Details Full-field teletext system with dynamic addressability Full-field teletext system with dynamic addressability

1983-10-19

1986-07-15

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082554, 358 84, 455 2, H04Q 900, H04N 718

Patent

active

046009213

ABSTRACT:
The present invention permits a teletext system operator to adjust subscriber access to service levels individually by adjusting a code at the head end station. A head-end station transmits a tier description page and a tier authorization page. The tier description page divides the data base into a group of tiers each comprising a defined range of pages. The authorization page lists authorization codes for all subscribers, one code per subscriber. Each subscriber station includes a permanent location code. When access is requested by the subscriber, the subscriber station uses the location code to acquire the authorization code transmitted by the head-end station. The authorization code indicates which tiers the subscriber station may decode. To change the service, the system operator may change the authorization codes at the head-end station or change the range definitions for the service level tiers.

REFERENCES:
patent: 4225884 (1980-09-01), Block et al.
patent: 4484217 (1984-11-01), Block et al.
patent: 4533948 (1985-08-01), McNamara et al.

Affiliated with

Also associated with

Rating

Full-field teletext system with dynamic addressability does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Full-field teletext system with dynamic addressability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Full-field teletext system with dynamic addressability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1743206