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VIDEO DATA PATH
30 November, 1999
1.5 VIDEO DATA PATH
1.5.1 TRANSMISSION
Original
Contact Image Sensor Assembly
Image Sensor
L E D
FCU
Amplifier
DIP
Video
M D M
Amplifier
Processing
FCIP2
M e m o r y
D C R
DATA/ADDRESS BUS
Attenuator
D R A M
Line Buffer
E C M / S A F
HIC
/FIFO
M e m o r y
M e m o r y
N C U
To the network
H545V506.WMF
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.
1-14
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