Circuit arrangement for a television receiver comprising a video

Details Circuit arrangement for a television receiver comprising a video Circuit arrangement for a television receiver comprising a video

1987-05-11

1989-01-24

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 22, 358147, 358183, H04N 7087, H04N 974, H04N 5262

Patent

active

048004286

ABSTRACT:
A circuit arrangement for a television receiver including a video text decoder (30), producing signals from the video text data from which control signals for a picture display device can be derived. The circuit arrangement further including a television signal decoder (1), deriving from the television signal via a low-pass filter arrangement (15) the luminance signal which can be taken from the luminance signal output (18). The low-pass filter arrangement (15) has a first attenuation characteristic for suppressing the chrominance signal and a second attenuation characteristic for allowing all video text data to pass. The second attenuation characteristic of the low-pass filter arrangement (15) is used during the period of time in which the video text data occur. The input of the video text decoder (30) is coupled to the luminance signal output (18) of the television signal decoder (1).

REFERENCES:
patent: 4388639 (1983-06-01), Cox et al.
patent: 4393404 (1983-07-01), Cox et al.

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