Television – Image signal processing circuitry specific to television – Special effects
Patent
1992-07-28
1994-02-08
Powell, Mark R.
Television
Image signal processing circuitry specific to television
Special effects
358451, H04N 1353
Patent
active
052852814
ABSTRACT:
Disclosed is a pictorial image compression device comprising an A/D converter converting an analog image input signal into digital image data, a clock dropout circuit producing a dropout indication signal and a partly dropped-out clock on the basis of a write clock and data of a selected compression rate, an averaging circuit averaging the image data according to the partly dropped-out write clock, a memory successively storing the image output data from the averaging circuit in response to the partly dropped-out write clock, a reading circuit reading out the image data stored in the memory, and a D/A converter converting the image data read out by the reading circuit into an analog signal, so that images can be continuously compressed without highlighting undesirable discontinuity at the edge of each image. Thus, the device can continuously compress image data in spite of its simple circuit structure.
REFERENCES:
patent: 4729012 (1988-03-01), Jose et al.
patent: 5029017 (1991-07-01), Abe et al.
Kawamoto Sigeharu
Nakanishi Masahiro
Matsushita Electric - Industrial Co., Ltd.
Powell Mark R.
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