Fascicle 1 of the ARIB STD-B62 standard, published in 2014, defines Unicode mappings for a selection of the B24 extended characters (excluding, for example, those duplicated by JIS X 0213), as well as a few extended Kanji.[5] It also includes a mapping of utilised characters outside the Basic Multilingual Plane to the BMP's private use area.
The ARIB STD B24 standard defines multiple character sets and a method of switching between them. These include a Kanji set (an extension of JIS X 0208), an Alphanumeric set, a Hiragana set, Katakana sets of two distinct layouts and four mosaic sets.[6] The sets are selected using ISO 2022 mechanisms for 94-sets, using the following codes (proportional sets use the same layout as the corresponding non-proportional ones):[7]
Set
Type
Code (column/line)
Code (hexadecimal)
Code (ASCII character)
Comments
Kanji
2-byte
4/2
42
B
The escape code B used for the ARIB Kanji set[7] is used for the 1983 version of JIS C 6226 (JIS X 0208, of which the ARIB Kanji set is an extension) in ISO-2022-JP.[8][9]
Alphanumeric
1-byte
4/10
4A
J
JIS_C6220-ro (ISO646-JP, JIS X 0201 Roman set). Similar to ASCII, with two assignments differing. Escape code J matches usage in ISO-2022-JP.[9]
Proportional alphanumeric
1-byte
3/6
36
6
Hiragana
1-byte
3/0
30
0
Hiragana themselves follow the same layout as row 4 of JIS X 0208, but without a lead byte. Also adds several additional assignments for punctuation.
Proportional Hiragana
1-byte
3/7
37
7
Katakana
1-byte
3/1
31
1
Katakana themselves follow the same layout as row 5 of JIS X 0208, but without a lead byte. Also adds several additional assignments for punctuation.
This is a double-byte character set extending JIS X 0208.
Lead byte
The encoding bytes correspond to the row or cell number plus 0x20, or 32 in decimal (see below). Hence, the code set starting with 0x21 has a row number of 1, and its cell 1 has a continuation byte of 0x21 (or 33), and so forth. Most of the code corresponds to JIS X 0208.
Character set 0x7A (row number 90, traffic symbols)
Characters 90-45 through 90-63 and 90-66 through 90-84 (shown below shaded) are listed in the B24 standard only in table 7-10 (the list of extension characters), and are also the only characters in rows 90 through 91 which are not transport-related symbols; this is noted in the B24 standard in an endnote to table 7-10.[10] The remainder of the extensions are listed in both table 7-4 (the double-byte code chart) and table 7-10.[10]
ARIB STD-B24 Kanji (double-byte) set (prefixed with 0x7A)[5][11]
This section needs expansion. You can help by adding to it. (January 2019)
Shift_JIS variant
In addition to the modified ISO 2022 encoding, the B24 standard also specifies a Shift JIS encoding following JIS X 0208:1997, but with the addition of the extended characters in the kanji set.[1]
First byte
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
␀
␁
␂
␃
␄
␅
␆
␇
␈
␉
␊
␋
␌
␍
␎
␏
1
␐
␑
␒
␓
␔
␕
␖
␗
␘
␙
␚
␛
␜
␝
␞
␟
2
␠
!
"
#
$
%
&
'
(
)
*
+
,
-
.
/
3
0
1
2
3
4
5
6
7
8
9
:
;
<
=
>
?
4
@
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
5
P
Q
R
S
T
U
V
W
X
Y
Z
[
¥
]
^
_
6
`
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
7
p
q
r
s
t
u
v
w
x
y
z
{
|
}
‾
␡
8
9
A
｡
｢
｣
､
･
ｦ
ｧ
ｨ
ｩ
ｪ
ｫ
ｬ
ｭ
ｮ
ｯ
B
ｰ
ｱ
ｲ
ｳ
ｴ
ｵ
ｶ
ｷ
ｸ
ｹ
ｺ
ｻ
ｼ
ｽ
ｾ
ｿ
C
ﾀ
ﾁ
ﾂ
ﾃ
ﾄ
ﾅ
ﾆ
ﾇ
ﾈ
ﾉ
ﾊ
ﾋ
ﾌ
ﾍ
ﾎ
ﾏ
D
ﾐ
ﾑ
ﾒ
ﾓ
ﾔ
ﾕ
ﾖ
ﾗ
ﾘ
ﾙ
ﾚ
ﾛ
ﾜ
ﾝ
ﾞ
ﾟ
E
F
Second byte
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
Non printable ASCII character
Unaltered ASCII character
Modified ASCII character
Single-byte half-width katakana
First byte of a double-byte character, used by JIS X 0208
First byte of an ARIB extended character
Not used as first byte, unallocated space in JIS X 0208
Not used as first byte
Second byte of a double-byte character whose first half of the JIS sequence was odd
Second byte of a double-byte character whose first half of the JIS sequence was even
^Glossed as "temple" (i.e. Buddhist temple) in B24 table 7-10 (the list of extension characters).
^ abcdefSmall form (70% size per code chart / table 7-10) of a kanji character. Shown here simulated. Private Use Area code points shown are those used by the Nishiki-teki font.[13]
^ abcdefghijklmnopqrstuvwxyzaaabacadMusical abbreviation (or half thereof) not present in Unicode, simulated here with multiple characters. Private Use Area code points shown are those used by the Nishiki-teki font.
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