CHAPTER 3 PCL5C - 8
♣ Bits/index
Specifies the palette size at 2
n
. n indicates bits/index. (n=4 2
4
=16 palettes)
When the encoding mode is 0 or 1, the palette size selected by the bits/index value specifies the range of the
index No., which can be used for raster data.
The values specified by the encoding mode are listed below;
Encoding Mode Bits/Index
0 0,1,2,3,4,5,6,7,8
1 1,2,4,8
2 1
3 8
♣ Bits/value (#1, #2, #3)
Each value indicates a color as follows;
#1: red
#2: green
#3: blue
When the encoding mode is 0 or 1, it ignores this setting. The black/white reference, described later, is set.
When the encoding mode is 2, it shows the number of planes that are required to send each color.
When the encoding mode is 3, it shows the number of bits that are required to send each color.
It sets the black reference to 0. (Valid when the Encoding mode is 0 or 1.)
It sets the white reference to 2
n
-1. (Valid when the Encoding mode is 0 or 1.)
2) Long Format
MSB LSB
0 - 1 Format (0) Encoding mode
2 - 3 Bits / index Bits / value #1
4 - 5 Bits / value #2 Bits / value #3
6 - 7 White reference for value #1
8 - 9 White reference for value #2
10 - 11 White reference for value #3
12 - 13 Black reference for value #1
14 - 15 Black reference for value #2
16 - 17 Black reference for value #3
The long format allows you make the setting of the white/black reference in addition to the ones available in the
short format.
♣ White reference for value #1, #2, #3
This mode specifies the white value (the lowest level of density).
Each value indicates a color as follows;
#1: red
#2: green
#3: blue
Range: -32767 ~ 32767
When the encoding mode is 2 or 3, this setting is valid.
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