Apparatus for generating a plurality of quasi-moving PIP/POP scr

Details Apparatus for generating a plurality of quasi-moving PIP/POP scr Apparatus for generating a plurality of quasi-moving PIP/POP scr

1997-07-16

1998-05-19

Burgess, Glenton B.

Television

Basic receiver with additional function

For display of additional information

348567, 348588, 348731, H04N 550

Patent

active

057542538

ABSTRACT:
An apparatus for generating a plurality of picture-in-picture/picture-out-picture (PIP/POP) screens, capable of achieving a fast tuning for a plurality of channels. In accordance with the invention, automatic gain control data associated with each channel is stored in a tuning memory upon an initialization thereof. Video data stored in a buffer video memory is displayed and stored in a main video memory. Write and read operations of these video memory are controlled in a handshake fashion using a flag. Upon a channel change, previously stored automatic gain control data and tuning frequency are used, thereby achieving a fast tuning. The apparatus of the invention can provide fast quasi-moving PIP/POP screens.

REFERENCES:
patent: 4249213 (1981-02-01), Imaide et al.
patent: 5420642 (1995-05-01), Baek
patent: 5434626 (1995-07-01), Hayashi et al.

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