Circuit and method for compensating for position of main picture

Details Circuit and method for compensating for position of main picture Circuit and method for compensating for position of main picture

1994-05-06

1996-11-12

Peng, John K.

Television

Synchronization

Control of picture position

348567, 348568, H04N 545, H04N 3227

Patent

active

055745075

ABSTRACT:
A method and apparatus for compensating for a position of a main picture displayed on a display screen of a display includes a sub-picture processor, a chroma processor and a display controller. The sub-picture processor receives an intermediate frequency signal of a sub-picture, and produces a sub-picture video signal of a predetermined aspect ratio from the intermediate frequency signal. The chroma processor receives a main picture video signal representing the main picture, and the sub-picture video signal. The chroma processor generates a composite video signal from the main picture video signal and the sub-picture video signal, and outputs the composite video signal to the display. The display controller controls the sub-picture processor and the display such that the main picture and the sub-picture are displayed on the display screen with a position of the main picture shifted on the display screen in a first mode of operation.

REFERENCES:
patent: 5237417 (1993-08-01), Hayashi et al.
patent: 5285284 (1994-02-01), Takashima et al.
patent: 5331349 (1994-07-01), Kim
patent: 5365278 (1994-11-01), Willis
patent: 5369444 (1994-11-01), Ersoz et al.
patent: 5452012 (1995-09-01), Saitoh
patent: 5453796 (1995-09-01), Duffield et al.

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