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June 30, 1998
2.3.14 COMPRESSION AND STORAGE
Circuit
IPU
The compression and storage circuit consists of the GA1 IC, GA2 IC, DRAM, and
the hard disk drive. The functions of each device are as follows.
GA 1:
GA 2:
DRAM (12 MB):
Hard Disk Drive:
FIFO
GA 2
2 M
2 M
D R A M
D R A M
2 M
2 M
D R A M
D R A M
Compressing/decompressing the 8-bit image data
Image rotation
Image data transfer to the HDD, FIFO memory, and GA2
Controls the HDD
Compressing and decompressing the image data
Image rotation
Image transfer to the DRAM, and GA 1
Image repeat
Image combine
Stores compressed data from GA1
Stores compressed data
Electrical sort
Misfeed back-up
2-41
IMAGE PROCESSING
GA 1
H D D
2 M
D R A M
2 M
D R A M
A229D626.WMF
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