**ISO/IEC 10918-1 : 1993(E)**

SC

context-index for coding of correction bit in successive approximation coding

Se

end of spectral selection band in zig-zag sequence

SE

context-index for coding of end-of-block or end-of-band

SI

Huffman code size

SIGN

1 if decoded sense of sign is negative and 0 if decoded sense of sign is positive

SIZE

length of a Huffman code

SLL

shift left logical operation

SLL

logical shift left of

by

bits

SN

context-index for coding of first magnitude category when V is negative

SOF

0

baseline DCT process frame marker

SOF

1

extended sequential DCT frame marker, Huffman coding

SOF

2

progressive DCT frame marker, Huffman coding

SOF

3

lossless process frame marker, Huffman coding

SOF

5

differential sequential DCT frame marker, Huffman coding

SOF

6

differential progressive DCT frame marker, Huffman coding

SOF

7

differential lossless process frame marker, Huffman coding

SOF

9

sequential DCT frame marker, arithmetic coding

SOF

10

progressive DCT frame marker, arithmetic coding

SOF

11

lossless process frame marker, arithmetic coding

SOF

13

differential sequential DCT frame marker, arithmetic coding

SOF

14

differential progressive DCT frame marker, arithmetic coding

SOF

15

differential lossless process frame marker, arithmetic coding

SOI

start-of-image marker

SOS

start-of-scan marker

SP

context-index for coding of first magnitude category when V is positive

Sq

vu

quantized DCT coefficient

SRL

shift right logical operation

SRL

logical shift right of

by

bits

Ss

start of spectral selection band in zig-zag sequence

SS

context-index for coding of sign decision

SSSS

4-bit size category of DC difference or AC coefficient amplitude

ST

stack counter

Switch_MPS

parameter controlling inversion of sense of MPS

Sz

parameter used in coding magnitude of V

S0

context-index for coding of V

=

0 decision

t

summation index for parameter limits computation

T

temporary variable

**CCITT Rec. T.81 (1992 E)**

**11**