VIDEO DATA PATH
21 May, 1999
1-14
1.5 VIDEO DATA PATH
1.5.1 TRANSMISSION
Immediate Transmission:
Scanned data from the contact image sensor passes to the DIP in the FCIP05.
After analog/digital video processing, the DCR (or the JBIG LSI if JBIG
compression is to be used) compresses the data for transmission. The compressed
data passes through the DCR buffer, then 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.
At the time of transmission, the DCR decompresses the data from the SAF
memory, then compresses it again (or the JBIG LSI compresses the data if JBIG
compression is to be used) for transmission. The compressed data passes through
the DCR buffer, then to the ECM memory before entering the telephone line
through the modem.
During G4 transmission, the compressed data from the DCR buffer passes through
the SiG4 board.
Parallel Memory Transmission
This feature allows the machine to scan a document into the SAF memory and
send the same document simultaneously.
The machine stores the processed video data in the SAF memory and sends the
data through modem at the same time.
Contact Image Sensor
F C U
T o P S T N
J B I G
F C I P 0 5
D I P
D C R
Amplifier
M o d e m
D A T A / A D D R E S S B U S
D R A M
Line
Buffer
E C M / D C R
Buffer
H I C
N C U
S A F
M e m o r y
SiG4
To ISDN
H547V509.WMF
