Automatic level adjusting system for a television receiver

Facsimile and static presentation processing – Static presentation processing – Attribute control

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Details

358 34, H04N 973

Patent

active

049300040

ABSTRACT:
An automatic level adjusting system for a television receiver which is suitable as its automatic white balance adjusting circuit. In the manufacturing-process of the television receiver, desired data is selected from a positional data group of black or white reference pulse signal to be inserted into a video signal and is stored in a non-volatile memory, whereby when an image is reproduced, black or white level of the video signal is adjusted automatically on the basis of the data stored in the non-volatile memory. Thus, the insertion position of black or white reference pulse signal can be changed without modifying the hardware of the television receiver so that the automatic level adjusting system can be applied commonly to different types of television receivers.

REFERENCES:
patent: 4646161 (1987-02-01), Tsuchiya et al.
patent: 4679065 (1987-07-01), Umezawa
patent: 4700218 (1987-10-01), Thomsen et al.
patent: 4706108 (1987-11-01), Kumagai et al.
patent: 4746970 (1988-05-01), Hosokawa et al.
patent: 4797733 (1989-01-01), Takagi et al.
patent: 4860092 (1989-08-01), Hieda

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