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SKYROS Corporation VideoNet 8.4 User guide
Picture 3.5.1-12
Original image
It’s necessary to draw attention to face, eye outline, hair
Picture 3.5.1-13
DVPack 1.42
(-)
Blocking
(+)
Good sharpness of borders
(-)
Low details
Picture 3.5.1-14
DVPack 2
(+)
No blocking
(+)
High sharpness of borders
(+)
High details
Frame size
At the same visual quality size of video image frame, compressed by
DVPack 2
method, is considerably smaller than in case of using
DVPack 1.42
method.
The table below lists average sizes of video image frames (in Kb), compressed by
DVPack 1.42
and
DVPack 2
methods (for full-format video image with average
motion intensity):
Visual quality level
Low quality (PSNR*=35.5)
Good quality (PSNR=38.0)
High quality (PSNR=40.5)
DVPack 1.42™
10.5
24.1
75.8
DVPack 2™
2.8
7.4
18.3
Method of compression
* Mehod of peak signal to noise ratio calculation (PSNR).
As is clear from the table, using of
DVPack 2
allows to reduce size of compressed
image by half or to one quater as compared with
DVPack 1.42
(depending on
detailing degree of image, quantity of motion and othe factors) on assumption that
visual quality is the same or better. Thus using of
DVPack 2
algorithm considerably
bate demand to storage volume for high resolutions of video image, what provides:
• deeper storage at the same hardware configuration;
