Method for picture-in-picture insertion and device for performin

Details Method for picture-in-picture insertion and device for performin Method for picture-in-picture insertion and device for performin

1991-08-23

1994-11-29

Powell, Mark R.

Television

Basic receiver with additional function

For display of additional information

348715, H04N 5272

Patent

active

053694422

ABSTRACT:
In a method for picture-in-picture insertion, successive frames of a small picture to be inserted into a main picture having successive frames are alternatingly written frame-wise into a memory region of a memory device. A decision signal is generated at a beginning of a display of the main picture, for deciding from which of the two memory regions a stored frame of the small picture is to be read out. Frames of the small picture are read out from whichever memory region enables joint-line-free insertion of the small picture into the main picture.

REFERENCES:
patent: 4665438 (1987-05-01), Miron
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patent: 4987493 (1991-01-01), Canfield
patent: 4991013 (1991-02-01), Kobayashi
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IEEE Transactions on Consumer Electronics, Feb. 1979, pp. 152-159; Masuda: "Fully Digitalized Color Picture in Picture Television System".
IEEE Transactions on Consumer Electronics, Aug. 1987; pp. 230-238; Masuda et al: "Picture in Picture System with a Digital Memory for VCRS".

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