Key ********
***** *** * *** key ********* **** **** test:
- ~***% ******* ********:****** ** ******* ******* from ***** ** **, bit **** ********* ** average ** ~***% **** day ** *****. ********* varied **** * *** of ~**% ** **** 400%.
- ******* ******* ****** ***** past *****:*** ***% ******* **** in **** **** ** roughly **% ***** **** the ***% ******* ** our **** *****.
- ** ******** ******:*** ******* ****** ** performance *********** ** **** vs. ******* ******* *** ********* ** integrated **, *** ***** in *** ******** ** cameras, ***** ** *** very ******* ******* ***** ago.
- *** (*** **** * cap) ***********:** ****** ********* ******, we ********* ***** ******* bit **** ****, ** this ****** *** ***** to **** ** *** as ******** ****** **** complex *****, *** **** bandwidth ** * ********* limit ** ***** ****** network ******* *** *******, with ******* ****** ** video *******.
**** **** ***** **** no ********** ****** ** how ****** ****** ***** on ************ ** **********. Each ************ *** ********** varied ******, *** ****** sizes *** ***** ** make * **** *************.
145% ******** *******
****** ***** ** *******, the ******* (****) ********* increase **** *** ** night *** * ***%. Note **** *** ****** was "****" ~**%, **** the ***% ******* ****** higher *** ** ******** 400%+ ********* ** **** cameras.
**** *** *** ******* arranged ** **********:

Much ******* ******** **** **** *****
** ******** ** *** 145% ******** **** ** current *****, ******* ** our **** **** ******** 498% ****** ********* ** night, **** *** ****** spiking ****** *,***% ******.

The **********: ********** ** *** **** *********
*** **** ********* ****** change ** ****** *********** between *** ******** **** in **** *** ****** tested ** **** ** the ********* ** ********** IR ** ****** ***** camera ******, ******** ** only * ****** ** 2014 **** *** ******* was ***** ****.
********** ****, ** ** look ** **** ***** integrated ** ****** **** 2014, *********** *** **** more ******* ** **** averages, * ***% ******* increase.

***** ****** *********** *** improved, **** **** ********* encoders, ****** *** **** sensitive *******, *** ****** processing, *** ******** ** infrared ***** ** ********* surveillance *** *** ***** positive ****** ** ********.
Root ***** ** ********* ******: ******** *****
*** ****** ** ***** spikes ** *** ******* moving *****, *** ****, static, *******, ** **** that ** ********* *********** **** *******.
** ***** **** **:

** ** *******, **** noise, **** *** **** contrast (***** *** ***** near **** *****) *** rapid ********* (******* ******), make ** ****** ** encode. ******,********* ******* *** ****** / ***** **** *** similar *** **********. ***** undermines **** ** *****.
Recommendation: *** *** **** * ***
*** *** ** ***** massive ********* ****** *** be ******* ** ******* *** **** * cap, **** ***** ** MBR(******* *** ****). **** method ****** ******** ** fluctuate ** ********* ** fit *** *****, *** only ** ** * specified *****, ** ***** point *** ****** ********* compression ** ****** ** drop ****** ** **** within *** *** (********* the ****** ** *********).
** *** *****, **** when **** ******************** ********* **** ** average ** ~** ** 35, ***** ******* *********** were *******, **** ****** bandwidth ***** ** **** 80%

Constant *** **** *** ***********
******** *** **** *** also ** **** ** prevent ******, ***** ** locks *** ***** ** one ********* ***** ********** of ******** ** *** scene. *******, ****** *** day, **** ****** *** less *******, *** *** waste *********/******* ** *** camera ***** **** *********** encode *** ***** **** set ** ***. ******* of ****, *** ** not *********** ****** ** the **** ****** ***** does *** ******* ***.
Digital ***** ********* ******
******* ****** ********* ***** is **** ** ****** spikes *** ** ********* noise ** ******* ***** reduction (***), ***** ******** to ******* ***** ****** by ********* ** ****. There *** *** *** methods, ******* (***** ********** in * ****** *****) and ******** (***** ********* by *********** ******** ******), which *** ********* ******** in ******. ***** ***, spikes *** ** *********** cut, **** **-**% ********** in *** **** ******** *** *****.
*******, *** *** **** introduce ******** *******, ** well, **** **** ****** of ******** ***** ********* causing **** ** ***** (shown *****), ********* ******* to *** ******* ** slow *******. ******* ** this, ***** ****** ** careful ** *** ******** DNR ** ******* ******.
*** **** ******* *** testing, *** *** ****** *** (******* ***** Reduction) ***** *** ****.
Test *******
** ****** ** ******* from *** ************* *** (~300 ***) *** ***** (~0.1 ***) ******** ****** scenes. *** ******* *********** levels **************** ***-** ****** ******* smart ****** **. ***** codecs **** ******* ** their ******* ******.
[****: **** **** *** originally ******** ** ****. We ********** ***** *** test ** **** *** republished *** ****** **** the *** ******* *** contrasting *** *** ****.]
Comments (8)
Undisclosed #1
The numbers in the "Day" and "Night" columns are Mbps, correct?
Create New Topic
Jeff Gack
I have found that turning the sharpness setting on the camera down a bit helps with the high nighttime bandwidth.
Create New Topic
Donald Gordon
We've had quite a bit of experience with this since the nighttime bandwidth overran our wireless network capacity at night. We use Hikvision cameras and made the following settings:
- WDR set to 25 (range is 0..100, default is 50) - decreases dynamic range sensitivity
- DNR set to 75 (range is 0..100, default is 50) - increases noise filtering
- Sharpness set to 25 (range is 0..100, default is 50) - decreases sharpness
All of these settings decrease the quality of the video especially during the day. The sharpness setting muted the vibrancy of the daytime video signal and in many cases on a camera by camera basis we had to back this value back off to a value closer to the default value.
The 4K cameras were the worst offenders for nighttime bandwidth blooming. In some cases, the camera ignored the MBR cap we set which was disappointing. Only just a few cameras had the blooming problems but we saw daytime bandwidth increase from 4 mbps during the daytime to 20 mbps at night and occasionally as much as 100 mbps as reported by the Milestone Smart Client System Monitor. The bandwidth increases were not constant and varied considerably between samples in the System Monitor. We were using the H.264+ CODEC on all the cameras.
Create New Topic
Undisclosed Manufacturer #2
Are all of these mpbs values with H264+ codecs? As a comparison, it would also be interesting to see if H265 makes a difference in this scenario.
Create New Topic
Undisclosed Integrator #3
Axis seen to de very well here, can you attribute this to anything in particular?
Create New Topic