Compatible digital processing unit for teletext and control meth

Details Compatible digital processing unit for teletext and control meth Compatible digital processing unit for teletext and control meth

1991-07-29

1994-02-01

Kostak, Victor R.

Television

Nonpictorial data packet in television format

Including teletext decoder or display

348464, H04N 704

Patent

active

052836479

ABSTRACT:
The present invention relates to teletext, in which the character multiplex signals of the international title standard can be processed together with those of the North America teletext standard by a compatible digital processing unit for the teletext and a method thereof. A timing clock signal and a byte clock signal are generated if character multiplex signals of the international title standard are provided, in order to store the character multiplex signals in a programmable RAM in synchronization with the generated clock signals and to generate the interrupt request signals at the same time. The character multiplex signals transmitted in the international title standard are compatibly converted into the North America teletext standard in response to the interrupt request signals.

REFERENCES:
patent: 4841365 (1989-06-01), Guenot et al.
patent: 4933764 (1990-06-01), Kinghorn

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