DMG 3200/3100/3000 – User Manual
Page 220 (306)
The following parameters are available for video extended configuration:
Weighted
Prediction
In H264 mode, the encoder can employ Weighted Prediction to improve
the coding efficiency of fades and dissolves. It is recommended to have
this enabled.
Fade Detection
When a fade is detected, the GOP structure is adjusted to improve the
encoding efficiency of the fade. It is always enabled.
Scene
Change
Detection.
When a scene change is detected, the GOP sequence is adapted so that
the new scene starts with an I frame. It is recommended to have this
enabled.
GOP Size
Sets the number of frames in a GOP. Higher GOP will deliver better VQ,
but STB channel change will be longer due to larger gap between I
frames. The GOP size may vary if Scene Change Detection is enabled
because I frames will be inserted to improve VQ.
8.5.5 MPEG-2 Parameters
The following parameters are available for MPEG-2 configuration:
Figure 8.33-
Universal Transcoder- dense broadcast MPEG-2parameters
Intra DC Precision
Quantization resolution of the DC (luminance) component in intra
frames. Normal setting is 8 bits. Consider to increase precision when
encoding at high bitrates. Valid range: 8 - 10bits and Auto.
Intra DC Precision
Number of bits to use for Intra-DC values. Modes to use for Intra-
VLC: MPEG-1, Alternate or Auto.
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