ISO/IEC 10918-1 : 1993(E)
3.2
Symbols
The symbols used in this Specification are listed below.
A
probability interval
AC
AC DCT coefficient
AC
ji
AC coefficient predicted from DC values
Ah
successive approximation bit position, high
Al
successive approximation bit position, low
Ap
i
ith 8-bit parameter in APP
n
segment
APP
n
marker reserved for application segments
B
current byte in compressed data
B2
next byte in compressed data when B
=
X'FF'
BE
counter for buffered correction bits for Huffman coding in the successive approximation
process
BITS
16-byte list containing number of Huffman codes of each length
BP
pointer to compressed data
BPST
pointer to byte before start of entropy-coded segment
BR
counter for buffered correction bits for Huffman coding in the successive approximation
process
Bx
byte modified by a carry-over
C
value of bit stream in code register
C
i
component identifier for frame
C
u
horizontal frequency dependent scaling factor in DCT
C
v
vertical frequency dependent scaling factor in DCT
CE
conditional exchange
C-low
low order 16 bits of the arithmetic decoder code register
Cm
i
ith 8-bit parameter in COM segment
CNT
bit counter in NEXTBYTE procedure
CODE
Huffman code value
CODESIZE(V)
code size for symbol V
COM
comment marker
Cs
conditioning table value
Cs
i
component identifier for scan
CT
renormalization shift counter
Cx
high order 16 bits of arithmetic decoder code register
CX
conditional exchange
d
ji
data unit from horizontal position i, vertical position j
d
ji
k
d
ji
for component k
D
decision decoded
CCITT Rec. T.81 (1992 E)
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