ISO/IEC 10918-1 : 1993(E)
Encoder and decoder control procedures
(This annex forms an integral part of this Recommendation | International Standard)
This annex describes the encoder and decoder control procedures for the sequential, progressive, and lossless modes of
The encoding and decoding control procedures for the hierarchical processes are specified in Annex J.
There is no requirement in this Specification that any encoder or decoder shall implement the procedures in precisely
the manner specified by the flow charts in this annex. It is necessary only that an encoder or decoder implement the function specified
in this annex. The sole criterion for an encoder or decoder to be considered in compliance with this Specification is that it satisfy the
requirements given in clause 6 (for encoders) or clause 7 (for decoders), as determined by the compliance tests specified in Part 2.
Implementation-specific setup steps are not indicated in this annex and may be necessary.
Encoder control procedures
Control procedure for encoding an image
The encoder control procedure for encoding an image is shown in Figure E.1.
Append SOI marker
Append EOI marker
Figure E.1 Control procedure for encoding an image
Figure E.1 [D61], = 11.5 cm = 449.%
CCITT Rec. T.81 (1992 E)