Pictorial image compression device

Abstract

Abstract Disclosed is a pictorial image compression device comprising an A/D converter (1) converting an analog image input signal into digital image data, a clock dropout circuit (3) 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 (2) averaging the image data according to the partly dropped-out write clock, a memory (5) successively storing the image output data from the averaging circuit (2) in response to the partly dropped-out write clock, a reading circuit (6) reading out the image data stored in the memory (5), and a D/A converter (7) converting the image data read out by the reading circuit (6) 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.

Inventors

• 👤 Sigeharu Kawamoto
• 👤 Masahiro Nakanishi

Bibliographic Details