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PROFILE
The profile defines the subset of bit stream features in an H.264 stream, including color reproduction and additional video compression. It is
important that the selected profile is compatible with the recording device so that a stream can be decoded and viewed.
Baseline: A simple profile with a low compression ratio. A baseline profile is compatible with more recorders but uses more bits to compress
quality video than the other profiles. This profile supports I-frames and P-frames. Use the baseline profile in applications with limited scene
changes; for example, an indoor scene with a single, unchanging primary light source and minimal motion.
Main: An intermediate profile with a medium compression ratio. Main is the default profile setting. This profile is compatible with most
recorders and uses fewer bits to compress video than the baseline profile; however, it uses more bits than the high profile. The main profile
supports I-frames, P-frames, and B-frames.
High: A complex profile with a high compression ratio. This is the primary profile for high-definition television applications; for example this is
the profile adopted for Blu-ray and HD-DVD. The high profile supports I-frames, P-frames, and B-frames.
GOP STRUCTURE
The group of pictures (GOP) structure is the sequence in which frames are placed within a video stream. The GOP structure always includes
intra-coded frames (I-frames) and predictive coded frames (P-frames), but it can also include bi-directionally predictive coded frames (B-frames).
Each GOP structure starts with an I-frame: an image of the complete scene that is used as the reference frame in the structure. P-frames record
data changes that are different than the previous frame. This allows the video encoder to save space since the data of the I-frame is not
duplicated. B-frames not only capture data changes from the previous frame, but they also capture the data changes from the frame after the
B-frame. B-frames are more compressed than P-frames and require more processing power to be decoded.
The encoder can be configured to use one of the following GOP structures:
IP: A compression that uses only I-frames and P-frames to provide low latency and a high level of decoder support. This GOP structure is
compatible with more recorders and decoders than IBBrBP.
IBBrBP: A compression that provides the highest quality image at a given bit rate, but it also increases the latency of the video and requires
more processing power for decoders.
ADVANCED SHARPENING
The Advanced Sharpening setting enhances picture detail by sharpening the edges in the picture. When this mode is enabled, there is a trade-off
between image quality and the resources required for processing power. The maximum camera resolution and image rate will not be available,
but the edges of the image seem sharper. Only use this setting if you cannot achieve the sharpness level you want by adjusting the digital
processing settings of the camera. The default setting for Advanced Sharpening is Off.