HDTV system having picture-in-picture function

Details HDTV system having picture-in-picture function HDTV system having picture-in-picture function

1995-11-14

1997-08-12

Hsia, Sherrie

Television

Basic receiver with additional function

For display of additional information

348566, 348567, H04N 545

Patent

active

056570929

ABSTRACT:
A HDTV system having a PIP function for implementing a PIP image by reconstructing an intraframe image with low resolution, includes a first tuner & channel decoder for receiving a video signal for a PIP via an antenna, a first depacketizer for receiving a signal generated in the first tuning & channel decoder and separating and outputting the same, a second tuning & channel decoder for receiving a video signal for a main screen via an antenna, a second depacketizer for receiving a signal generated in the second tuner & channel decoder and separating and outputting the same, a PIP decoder for receiving the video bit stream of the first depacketizer to reconstruct only the intraframe into a PIP image, a main video decoder for receiving the video bit stream of the second depacketizer and outputting a main image, a multiplexer for multiplexing the outputs of the PIP decoder and the main image decoder, and a VDP portion for receiving the output of the multiplexer and converting the luminance and chrominance signal into R, G and B signals to then be displayed. Therefore, the circuit is simplified owing to the adoption of fewer memories than a main video decoder and the cost is reduced.

REFERENCES:
patent: 4827343 (1989-05-01), Naimpally
patent: 4965669 (1990-10-01), Canfield

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