Inset picture centering in a pix-in-pix system
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United States of America Patent
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-
Jul 9, 1991
Grant Date -
N/A
app pub date -
Apr 20, 1989
filing date -
Apr 20, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A PIP system stores data indicative of the location of the center point of an inset picture with respect to a display screen center point in a memory area of a first size. The inset image data is read out of the memory area beginning with the data stored in a memory location known as the 'read address'. When a ZOOM-IN or ZOOM-OUT command is received, data representing a new video image of a different size is stored for display in an unused memory area of a different size, a new inset center point is computed, and a new read address is computed, so that the displayed centers of the new inset area of a different size, and the old inset area are substantially the same.
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