Signal transformation system and method for providing picture-in

Details Signal transformation system and method for providing picture-in Signal transformation system and method for providing picture-in

1993-10-07

1995-01-31

Kostak, Victor R.

Television

Basic receiver with additional function

For display of additional information

348407, H04N 5262, H04N 712

Patent

active

053862414

ABSTRACT:
The present invention relates to a novel method and system for providing high definition television receivers with a picture-in-picture (PIP) feature through the use of a reduced number of transform coefficients. The system comprises first decoding unit for decoding a main picture signal, second decoding unit for decoding a picture-in-picture signal by using a reduced number of transform coefficients including a d.c. coefficient, and position control means for providing a composite image composed of the main picture and the picture-in-picture on the screen. Interpolation of pixel data is performed by applying appropriate weight factors on neighboring pixel data based on the spatial relationship between the pixels and the heads generated by reduced motion vectors.

REFERENCES:
patent: 4139860 (1979-02-01), Micic et al.
patent: 4982288 (1991-01-01), Isobe et al.
patent: 5121205 (1992-06-01), Ng et al.
patent: 5157743 (1992-10-01), Maeda et al.
patent: 5202760 (1993-04-01), Tourtier et al.

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