Encoding/decoding system with two-stages of encoding/decoding

摘要

A compression and decompression system for transmitting facsimile images in which the facsimile image is compressed in a vertical and a horizontal direction. The compressed facsimile image is decompressed by selecting a reference bit in the decompressed facsimile image and expanding the bit in a vertical and a horizontal direction in accordance with a binary value of bits near the selected reference bit.