30 November, 1999 VIDEO DATA PATH
1-15
Overall
Information
1.5.2 RECEPTION
Data from the line passes to the modem through the NCU and hybrid integrated
circuit (HIC). After the modem demodulates the data, it passes through either the
FIFO or the ECM memory to the DCR block, which decompresses it into raster
image data. At the same time, the compressed data passes to the SAF memory as
a backup in case of mechanical problems during printing (this is known as
substitute reception).
The raster image data then passes to the page memory for printing. After a page of
data has been stored in the page memory, the data is sent to the LDDR through
the LIF block.
FCU
From the Network
NCU
HIC
Amplifier
MDM
FCIP2
DCR LIF
Data/ Address Bus
DRAM
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
Page
Memory
Copy Paper
LDDR
H545V507.WMF
MDM: Modem
DCR: Data Compression and Reduction
LIF: Laser Interface
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