6. Sub Scan Resolution Conversion
Since the scanner always scans at 15.4 line/mm resolution, sub scan resolu-
tion has to be converted when transmitting to a terminal which is not capable
of higher resolutions.
Standard: The first and third lines in each four-line group are OR processed
for transmission. Other lines are deleted.
Detail: Pairs of lines are OR processed for transmission.
Fine: All the scanned lines are transmitted.
In memory transmission, if the other terminal cannot receive a message at
Fine resolution, alternate lines (even-numbered lines) are deleted before
transmission.
Cut
Cut
OR
Processing
3.85 l/mm
Transmit
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
A
A
A
A
A
A
A
A
A
Feed
1st Line
2nd Line
3rd Line
4th Line
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
H521D513.wmf
Transmit
OR
Processing
Feed
OR
Processing
7.7 l/mm
7.7 l/mm
1st Line
2nd Line
3rd Line
4th Line
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
A
A
A
A
A
A
A
A
A
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
H521D514.wmf
Transmit
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
AAAA
Feed
1st Line
2nd Line
3rd Line
4th Line
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
15.4 l/mm
H521D515.wmf
May 22nd, 1995
DETAILED SECTION DESCRIPTIONS
SCANNER
2-9