Video Data Path; Transmission - Ricoh Aficio FX10 Service Manual

June 10th, 1997

1.5. VIDEO DATA PATH

1.5.1. Transmission

DIP: Digital Image Processor
DCR: Data Compression and Reduction
MDM: Modem
Immediate Transmission:
Scanned data form the contact image sensor passes to the DIP block in the
FCIP2. After analog/digital video processing, the DCR block compresses the
data for transmission. The compressed data then passes either to the FIFO
memory or to the ECM memory, before it is sent to the telephone line through
the modem.
Memory Transmission:
First, the scanned data is stored in the SAF memory after compression in the
DCR block.
At the time for transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other ter-
minal is done. The compressed data then passes either to the FIFO memory
or to the ECM memory, before it is sent to the telephone line through the mo-
dem.
Original
Contact Image Sensor Assembly
Image Sensor
Xenon Lamp
Amplifier
DIP
Video
Processing FCIP2
Memory
DCR
DATA/ADDRESS BUS
DRAM
Line Buffer
ECM/SAF
/FIFO
Memory
Memory
1-13
OVERALL MACHINE INFORMATION
FCU
MDM Amplifier
Attenuator
HIC
NCU
To the network
VIDEO DATA PATH
H523V506.wmf