User manual

Nero Digital expert settings
Seite 54
 Maximum GOP size
The number in the Maximum GOP Size field indicates the number of frames permitted
between I-Frames.
 Maximum B-Frames
The number in the Maximum B-Frames field indicates the maximum number of
consecutive B-Frames that can be used in a GOP.
11.2.11 Encoder Tools
You can make the settings for the encoder process in the Encoder Tools entry.
These setting options are only available if you have selected Nero Digital AVC in the Nero
Digital category.
11.2.11.1
CABAC
CABAC (Context Adaptive Binary Arithmetic Coding) is a particular coding method. Instead
of bit sequences of variable length, it uses better arithmetic coding to achieve a 10 to 20%
data rate saving.
This is only used with MPEG-4 AVC.
11.2.11.2
Bidirectional prediction
The Bidirection Prediction setting permits encoding using B frames.
11.2.11.3
Macroblock Partitions
The Macroblock Partitions setting allows you to split macroblocks (see 4 motions vectors
per macroblock
).
11.2.11.4
Weighted Prediction
The Weighted Prediction setting allows reference frames to be weighted when predicting
motion. This increases coding efficiency, particularly in the case of cross-fading.
11.2.11.5
8x8 Transform
The 8x8 Transform setting allows the encoder also to use an 8x8 transformation as an
alternative to the standard 4x4 transformation (see
4 motions vectors per macroblock).
This setting permits better compression, particularly for HD resolution.
11.2.11.6
Deblocking Settings
Deblocking Settings operates like a soft focus on the sharp edges of the macroblocks. You
can use the control to change the intensity of this effect.