IMAGE PROCESSING
2-41
SM A229
Detailed
Descriptions
2.3.14 COMPRESSION AND STORAGE
Circuit
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: Compressing/decompressing the 8-bit image data
Image rotation
Image data transfer to the HDD, FIFO memory, and GA2
Controls the HDD
GA 2: Compressing and decompressing the image data
Image rotation
Image transfer to the DRAM, and GA 1
Image repeat
Image combine
DRAM (12 MB): Stores compressed data from GA1
Hard Disk Drive: Stores compressed data
Electrical sort
Misfeed back-up
IPU
GA 1
HDD
GA 2
FIFO
2M
DRAM
2M
DRAM
2M
DRAM
2M
DRAM
2M
DRAM
2M
DRAM
A229D626.WMF
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