Double window processing device for television system

Details Double window processing device for television system Double window processing device for television system

1997-12-02

1999-10-05

Hsia, Sherrie

Television

Image signal processing circuitry specific to television

Special effects

348565, 348566, H04N 545

Patent

active

059632704

ABSTRACT:
A double window processing device for a television system capable of providing a high picture quality of double window pictures displayed on a screen by matching the synchronization of main-channel and sub-channel pictures. The double window processing device includes a first luminance/chrominance (Y/C) separating section for separating a main-channel composite video signal into first luminance and chrominance signals, a second Y/C separating section for separating the main-channel and sub-channel composite video signals into luminance and color difference signals for each channel, matching the synchronization of the respective separated luminance and color difference signals, and producing second luminance and chrominance signals for double windowing by combining the synchronization-matched luminance and color difference signals, and a Y/C switching section for switching the first and second luminance and chrominance signals from the first and second Y/C separating sections, and outputting final luminance and chrominance signals in a double window mode to display on a display screen the main-channel and sub-channel pictures according to the final luminance and chrominance signals.

REFERENCES:
patent: 5815216 (1998-09-01), Suh
patent: 5831591 (1998-11-01), Suh

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