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Network Camera User Manual
UM Network Camera User Manual 071421NA 24
estimate the HDD consumption by its maximum average bitrate. Compared to H.264, H.264+ reduces
storage by up to 50 percent with the same maximum bitrate in most scenes.
When H.264+ is enabled, Max. Average Bitrate is configurable. The device uses a recommended
maximum average bitrate by default. You can adjust the parameter to a higher value if the video quality
is not satisfactory. Maximum average bitrate should not be higher than the maximum bitrate.
NOTE:
When H.264+ is enabled,
Video Quality
,
I Frame Interval
,
Profile,
and
SVC
are not
configurable.
• H.265
H.265, also known as High Efficiency Video Coding (HEVC) and MPEG-H Part 2, is a compression
standard. In comparison to H.264, it offers better video compression at the same resolution, frame rate
and image quality.
• H.265+
H.265+ is an improved compression coding technology based on H.265. By enabling H.265+, you can
estimate the HDD consumption by its maximum average bitrate. Compared to H.265, H.265+ reduces
storage by up to 50 percent with the same maximum bitrate in most scenes.
When H.265+ is enabled, Max. Average Bitrate is configurable. The device gives a recommended
maximum average bitrate by default. You can adjust the parameter to a higher value if the video quality
is not satisfactory. Maximum average bitrate should not be higher than the maximum bitrate.
NOTE: When H.265+ is enabled, Video Quality , I Frame Interval , Profile , and SVC are not
configurable.
• I-Frame Interval
Defines the number of frames between two 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 intervals, generate 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 that can only decode a low-resolution subset, while more advanced hardware will be able
decode a high quality video stream.
•
MPEG4
MPEG4, referring to MPEG-4 Part 2, is a video compression format developed by the Moving Picture
Experts Group (MPEG).