Data separating circuit

Details Data separating circuit Data separating circuit

1994-07-25

1997-08-05

Lee, Michael

Television

Nonpictorial data packet in television format

Including teletext decoder or display

348465, H04N 700

Patent

active

056547641

ABSTRACT:
The present invention discloses a data separating circuit for separating digital data contained in a video signal. This invention uses a digital circuit formation rather than an analog circuit formation, in order to stabilize a slicing level. Such stabilization is quite important in TTX DATA separation in order to avoid detrimental effects of the environment, such as temperature variations, or errors in the analog components due to wide error tolerances. Furthermore, the present data separating circuit can analyze variations in the data ranges and in the present slicing level, and appropriately move the slicing level without being affected by noise or the transformation of signals, thereby precisely separating TTX DATA and being capable of adapting to changing conditions.

REFERENCES:
patent: 5136382 (1992-08-01), Meyer
patent: 5223930 (1993-06-01), Lato

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