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VMGB-
370 User’s Manual
42
Profile
This function means that under the same bitrate, the more complex the profile is, the higher the
quality of the image is, and the requirement for network bandwidth is also higher.
I-Frame Interval
I-frame interval defines the number of frames between 2 I-frames.
In H.264 and H.265, an I-frame, or intra frame, is a self-contained frame that can be
independently decoded without any reference to other images. An I-frame consumes more bits
than other frames. Thus, video with more I-frames, in other words, smaller I-frame interval,
generates more steady and reliable data bits while requiring more storage space.
SVC
Scalable Video Coding (SVC) is the name for the Annex G extension of the H.264 or H.265 video
compression standard.
The objective of the SVC standardization has been to enable the encoding of a high-quality video
bitstream that contains one or more subset bitstreams that can themselves be decoded with a
complexity and reconstruction quality similar to that achieved using the existing H.264 or H.265
design with the same quantity of data as in the subset bitstream. The subset bitstream is derived
by dropping packets from the larger bitstream.
SVC enables forward compatibility for older hardware: the same bitstream can be consumed by
basic hardware which can only decode a low-resolution subset, while more advanced hardware
will be able decode high quality video stream.
Smoothing
It refers to the smoothness of the stream. The higher value of the smoothing is, the better fluency
of the stream will be, though, the video quality may not be so satisfactory. The lower value of the
smoothing is, the higher quality of the stream will be, though it may appear not fluent.
Display VCA Info
VCA information can be displayed by Player and Video.
Player
Player means the VCA info can be displayed by the dedicated player provided by the
manufacturer.
Video
Video means the VCA info can be displayed by any general video player.
