Digital Signal Processing Reference
In-Depth Information
to reduce computational load on the decoder. It supports CAVLC
entropy coding.
Main Pro
le (MP)
This is optimized for broadcast applications, with support for
interlaced video. It also has features for weighted predictions,
meaning the predicted frame made up of proportions of the
values from several frames. This is used to efficiently compress
fades and dissolves in the video. All three frame types
e
I, P and B
are supported
as well as features for interlaced video. It
supports the CABAC entropy coding.
e
Extended Pro
le (XP)
This profile is optimized for internet streaming applications,
where both high compression rates and the ability to cope with
data loss is important. It's able to tolerate data losses during
transmission or switching. Some additional features are included
to make it easier to interface to the streaming network layer.
High Pro
le (HiP)
Intended for high-definition video applications, high profiles
are used on video disks such as Blu-ray. The high profiles are
a superset of the main profile, and support extended bit widths,
higher chroma-sampling options, frequency-dependent quanti-
zation and use of the higher computational 8
8 DCT transform.
Progressive High Pro
le (PHiP)
This profile is used in high-definition video applications, but
does not have any support for interlaced video features.
High 10 Pro
le (Hi10P)
Professional broadcast studios use high 10 profiles to process
high-definition video. This uses 10 bits per sample, rather than
the eight bits often used in consumer products.
High 4:2:2 Pro
le (Hi422P)
Similar to the Hi10P, Hi422P adds support for 4:2:2 chroma-
sampled video, and is mainly used in professional broadcast studios.
High 4:4:4 Predictive Pro
le (Hi444PP)
Again for professional broadcast applications, using up to 4:4:4
chroma sampling Hi444PP allows up to 14 bits per sample. The
color planes can optionally be coded separately.
