Toshiba E-STUDIO900 - Manual (Page 42)

PTM 2-17 B070/B071
2.3.2 IMAGE PROCESSING OVERVIEW
SBU:
Photoelectric conversion, Odd/even allocation, Amplification, A/D
Conversion (analog to digital), Light intensity detection (scanning)
BCU: Engine control, Scanner control, SBU settings, IPU settings, LDB
settings
IPU: Shading correction, Image Processing, Main/Sub scan
magnification, Video path switching, Image Compression/
Decompression. The GAVD on this board performs density
conversion processing, FCI processing, and edge processing, and
also generates the test patterns.
Controller: System control, software application control, image storage control,
file compression/decompression
LDB: 8-beam laser exposure, binary-to-grayscale conversion,
synchronization detection
CCD
PCI BUS
Polygon Motor
OPC
SBU
IPU BCU
LDB
Controller
HDD
Key
Data flow
Signal flow
B070D934.WMF