Texas Instruments DM6467, User Manual

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5-1
Chapter 5
Frequently Asked Questions
This chapter provides answers to few frequently asked questions relating
to using this encoder.
Table 5-3. FAQs for H264 Encoder on DM6467.
Question Answer
What are the parameters that
need to be set in the config file
to encode interlace content
(1080i)? The following parameters need to be set in the config file to encode
interlace content (1080i):
‰
InputContentType
base class parameter = 1 for interlace
coding.
‰
profileIdc
= 100 (High Profile)
‰
levelIdc = 40 (for 1080i)
This version of the encoder does not support High Profile features.
Does H.264 Encoder on
DM6467 support fixed NAL
size? If it supports, what are the
parameters that should be
configured to enable this? Yes, the encoder can support fixed NAL size. To enable this, the
profileIdc parameter should be set to 66 (Baseline Profile) and
following dynamic input parameters needs to set:
‰
sliceMode = 2 (Slice based on packet size)
‰
sliceUnitSize
= 1500 (size of the NAL unit)
‰
numRowsInSlice = 0
How to disable slice based
encoding? To disable slice based encoding, configure the
sliceMode
dynamic
input parameter as 0 (no slice).
How to enable/disable loop
filtering in the encoder?
To enable loop filtering, the dynamic input parameter
LoopFilterDisable should to be set to 0. To disable loop filtering, it
should be set to 1.
Can the encoder support
PicAFF encoding?
No, currently the encoder does not support this feature.
Can the encoder do color
conversion from 422 to 420?
Yes, the encoder can do color conversion. If the dynamic input parameter
ChromaConversionMode
is set to 0, the color conversion is done by
dropping alternate lines. If it is set to 1, color conversion is done by
averaging the two lines.