ISO/IEC 10918-1 : 1993(E)
Nb
number of data units in MCU
Next_Index_LPS
new value of Index(S) after a LPS renormalization
Next_Index_MPS
new value of Index(S) after a MPS renormalization
Nf
number of components in frame
NL
number of lines defined in DNL segment
Ns
number of components in scan
OTHERS(V)
index to next symbol in chain
P
sample precision
Pq
quantizer precision parameter in DQT segment
Pq(t)
quantizer precision parameter in DQT segment for quantization table t
PRED
quantized DC coefficient from the most recently coded block of the component
Pt
point transform parameter
Px
calculated value of sample
Q
ji
quantizer value for coefficient AC
ji
Q
vu
quantization value for DCT coefficient S
vu
Q
00
quantizer value for DC coefficient
QAC
ji
quantized AC coefficient predicted from DC values
QDC
k
kth quantized DC value used in prediction of AC coefficients
Qe
LPS probability estimate
Qe(S)
LPS probability estimate for context index S
Qk
kth element of 64 quantization elements in DQT segment
r
vu
reconstructed image sample
R
length of run of zero amplitude AC coefficients
R
vu
dequantized DCT coefficient
Ra
reconstructed sample value
Rb
reconstructed sample value
Rc
reconstructed sample value
Rd
rounding in prediction calculation
RES
reserved markers
Ri
restart interval in DRI segment
RRRR
4-bit value of run length of zero AC coefficients
RS
composite value used in Huffman coding of AC coefficients
RST
m
restart marker number m
s
yx
reconstructed value from IDCT
S
context index
S
vu
DCT coefficient at horizontal frequency u, vertical frequency v
10
CCITT Rec. T.81 (1992 E)