Ricoh FAX2000L - Video Data Path; Transmission

VIDEO DATA PATH 30 November, 1999
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1.5 VIDEO DATA PATH
1.5.1 TRANSMISSION
Immediate Transmission:
Scanned data from 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 entering 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 of transmission, the DCR block decompresses the data from the
SAF memory, then compresses it again after handshaking with the other terminal is
complete. The compressed data then passes either to the FIFO memory or to the
ECM memory, before entering the telephone line through the modem.
Contact Image Sensor Assembly
FCU
To the network
LED
Original
Video
Processing
Memory
FCIP2
DIP
DCR
Amplifier
MDM Amplifier
DATA/ADDRESS BUS
DRAM
Line Buffer
/FIFO
Memory
ECM/SAF
Memory
Attenuator
HIC
NCU
Image Sensor
H545V506.WMF