Automatic picture size control method for semiwide-screen televi

Television – Image signal processing circuitry specific to television – Special effects

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348556, H04N 974, H04N 546

Patent

active

060644451

ABSTRACT:
An automatic picture size control method for a semiwide-screen television receiver. According to the method, levels of left and right edge portions in all active period of one horizontal scanning line of a received television signal are sampled, and how many times a sampled level becomes a black level for a predetermined time is detected and counted. Thereafter, a size of a displayed picture is designated as a plus picture size or a normal picture if a counted value is larger than a predetermined first value, or smaller than a predetermined second value, respectively.

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patent: 5760837 (1998-06-01), Izawa et al.
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British Patent Office Search Report, dated Mar. 23, 1998.

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