MPEG-4 Profiles and Levels - A Practical Guide to Video and Audio Compression - page 675

I-slices

●

P-slices

●

De-blocking filter on decode

●

No field coding for interlacing

●

No adaptive frame/field coding

●

Quarter-pixel motion vectors

●

Macroblock segmentation for temporal prediction

●

Variable-length coding (CAVLC)

●

CABAC not supported

●

Arbitrary slice ordering

●

Flexible macroblock ordering

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Redundant slices

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G.5.2 Main Profile

This profile is designed to support broadcast-TV applications. Most of the baseline profile
is supported, but a few items are omitted and a few new features are added. The main pro-
file capabilities are the following:

I-slices

●

P-slices

●

B-slices

●

De-blocking filter on decode

●

Field coding for interlacing

●

Adaptive frame/field coding

●

Weighted prediction to support bit-rate bursting on transitions

●

Quarter-pixel motion vectors

●

Macroblock segmentation for temporal prediction

●

Variable-length coding (CAVLC)

●

CABAC

●

G.5.3 Extended Profile

The extended profile is available for use when building streaming-video systems. It is a
superset of the baseline profile with some additional features. It also includes most of the
main profile capabilities. Here is a summary of what it supports:

I-slices

●

P-slices

●

B-slices

●

De-blocking filter on decode

●

Field coding for interlacing

●

Adaptive frame/field coding

●

Weighted prediction to support bit-rate bursting on transitions

●