Testing Bandwidth Vs. Low Light

By: Ethan Ace, Published on Jan 16, 2019

Nighttime bandwidth spikes are a major concern in video surveillance. Many calculate bandwidth as a single 24/7 number, but bit rates vary dramatically from day to night. But how much? 100% more? 500%? 1,000%?

day night

To find out we tested cameras from six manufacturers - Avigilon, Axis, Dahua, Hanwha, Hikvision, Uniview - to find out how each did, what was average, and who was worst and best and how much performance has improved in the past several years.

********* ********* ****** *** a ***** ******* ** video ************. **** ********* bandwidth ** * ****** 24/7 ******, *** *** rates **** ************ **** day ** *****. *** how ****? ***% ****? 500%? *,***%?

day night

** **** *** ** ****** ******* **** six ************* - ********, Axis, *****, ******, *********, Uniview - ** **** out *** **** ***, what *** *******, *** who *** ***** *** best *** *** **** performance *** ******** ** the**** ******* *****.

[***************]

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 ** **********:

2019

Much ******* ******** **** **** *****

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

The **********: ********** ** *** **** *********

*** **** ********* ****** change ** ****** *********** between *** ******** **** in **** *** ****** tested ** **** ** the ********* ** ********** IR ** ****** ***** camera ******, ******** ** only * ****** ** 2014 **** *** ******* was ***** ****.

********** ****, ** ** look ** **** ***** integrated ** ****** **** 2014, *********** *** **** more ******* ** **** averages, * ***% ******* increase.

2014 only

***** ****** *********** *** 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%

bandwidth cap minimal impact on details

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

01/16/19 08:49pm

*** ******* ** *** "***" *** "*****" ******* *** ****, correct?

Avatar

Ethan Ace

IPVM | In reply to Undisclosed #1 | 01/16/19 08:56pm

******.

Jeff Gack

IPVMU Certified | 01/17/19 02:27am

* **** ***** **** ******* *** ********* ******* ** *** camera **** * *** ***** **** *** **** ********* *********.

Donald Gordon

IPVMU Certified | 01/17/19 06:11pm

**'** *** ***** * *** ** ********** **** **** ***** the ********* ********* ******* *** ******** ******* ******** ** *****. We *** ********* ******* *** **** *** ********* ********:

- *** *** ** ** (***** ** *..***, ******* ** 50) - ********* ******* ***** ***********

- *** *** ** ** (***** ** *..***, ******* ** 50) - ********* ***** *********

- ********* *** ** ** (***** ** *..***, ******* ** 50) - ********* *********

*** ** ***** ******** ******** *** ******* ** *** ***** especially ****** *** ***. *** ********* ******* ***** *** ******** of *** ******* ***** ****** *** ** **** ***** ** a ****** ** ****** ***** ** *** ** **** **** value **** *** ** * ***** ****** ** *** ******* value.

*** ** ******* **** *** ***** ********* *** ********* ********* blooming. ** **** *****, *** ****** ******* *** *** *** we *** ***** *** *************. **** **** * *** ******* had *** ******** ******** *** ** *** ******* ********* ******** from * **** ****** *** ******* ** ** **** ** night *** ************ ** **** ** *** **** ** ******** by *** ********* ***** ****** ****** *******. *** ********* ********* were *** ******** *** ****** ************ ******* ******* ** *** System *******. ** **** ***** *** *.***+ ***** ** *** the *******.

Undisclosed Manufacturer #2

01/21/19 02:43pm

*** *** ** ***** **** ****** **** ****+ ******? ** a **********, ** ***** **** ** *********** ** *** ** H265 ***** * ********** ** **** ********.

Avatar

Ethan Ace

IPVM | In reply to Undisclosed Manufacturer #2 | 01/22/19 07:38am

***, **** ** *** *.***. ** ***** **** *.*** ***** be ** *********** ******** ****, *** **** ** **** ** significantly ******* *** ****** ** ******* **'* ******* ** *** test. ** ********, ****, *****, *** ****** *** **** *.*** models ********, **'** **** ** **** *****.

Undisclosed Integrator #3

01/21/19 03:20pm

**** **** ** ** **** **** ****, *** *** ********* this ** ******** ** **********?

Avatar

Ethan Ace

IPVM | In reply to Undisclosed Integrator #3 | 01/22/19 07:49am

* ***** **'* * *********** ** *******. ***** ******* *** generally ***** *** ****** ******* ****** ** **** ** **** categories. **'* ****** **** ** ****/**** **** **** ***'* **** in ************* *** ** *** *****, *** ** *****.

**** *** ***** ***** *** **** ****** ** *** ******** of ***** ******* (******), ***** **** *********** *** ***** ********* or *********. **** ** ***** ******* ******** *** **** *** ARTPEC **** **** ******* *** ** ***** **********. **, * believe **** ***** ****'** ******* **** ***** *** ****, ** could ****** ** * ****** ** ****** "******" *** **** efficient ***********.

************, **** ******* **** ** (*******, *** *** ******) ** good ** *** *****. **** *** *****, *****, ***** *** performers *** *** ***** ******* *** ***** ** ******** ** generally **** **** **** **** *********** *******.

**** *** ******* *** ** **, * ***** ** *** helps ** *** **** ******.

**** ** *** ** *** **** **** ** ***** **** best. * ****** ** ********* ****** **** **** ********** ****, too, ********** ** **** ****** *********** *** **/** ****** *******. And ***** ****** ****** **** ** *** ***** ****** ** much ** ***** ******/******* *******, ***** **** *********.

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