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H.265+
H.265+ is an improved compression coding technology based on H.265. By enabling H.265+, you
can esmate the HDD consumpon by its maximum average bitrate. Compared to H.265, H.265+
reduces storage by up to 50% with the same maximum bitrate in most scenes.
When H.265+ is enabled, Max. Average Bitrate is congurable. The device gives a recommended
max. average bitrate by default. You can adjust the parameter to a higher value if the video quality
is less sasfactory. Max. average bitrate should not be higher than max. bitrate.
Note
When H.265+ is enabled, Video Quality, I Frame Interval, Prole and SVC are not congurable.
I-Frame Interval
I-frame interval denes 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 objecve of the SVC standardizaon 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 reconstrucon quality similar to that achieved using the exisng H.264 or H.265
design with the same quanty of data as in the subset bitstream. The subset bitstream is derived
by dropping packets from the larger bitstream.
SVC enables forward compability for older hardware: the same bitstream can be consumed by
basic hardware which can only decode a low-resoluon subset, while more advanced hardware
will be able decode high quality video stream.
MPEG4
MPEG4, referring to MPEG-4 Part 2, is a video compression format developed by Moving Picture
Experts Group (MPEG).
Network Camera User Manual
15
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