Advanced Video Processing and Networking
Table 6.5 Impairment Reduction Details
Impairment Reduction Comments
Spatial Filtering The amount of filtering is configurable.
6.7.1.6.1 InLoop Filter
For H.264 encoding, the perceived image quality is further enhanced by utilizing a
de-blocking filter in the feedback loop. This filters the frames after decoding, but
before they are stored in the decoded picture buffer, in order to try and remove block
edge artefacts.
6.7.1.6.2 Temporal Noise Reduction
When the CE/SWO/MCTF license is enabled the pre-processor can provide
temporal noise reduction which is motion adaptive (backs-off the filtering with
motion) to the sub-frame level.
6.7.1.6.3 Stills Detection Control
Setting this to other than Off will override the in-built intelligent stills detection. This
saves bit rate but has undesired video quality effects on complex stills.
6.7.1.6.4 Film Mode
The pre-processor identifies 3:2 pull-down sequences. Based on this information the
encoding engine identifies the appropriate fields as repeated. Film Mode can only be
used for SD inputs with a frame rate of 29.97 Hz.
6.8 VCM Video Operating Modes
Note: The output of the VCM may contain a discontinuity when the operating
mode (profile, buffer mode etc.) is changed.
6.8.1 Non-seamless Modes (CBR, Low Delay, Mega Low Delay, Compatibility,
Ultra Low Delay or Stripe Refresh)
When operating in a non-seamless mode, the output of the module may be
discontinuous when the bit rate is changed.
6.8.1.1 Constant Bit Rate (CBR) Mode (CE-x, CE-xA, CE-a and CE-HEVC)
The module supports a CBR constant bit rate mode (standard delay).
Any audio configuration is supported when the video is configured for CBR buffer
mode.
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