Advanced Camera Bandwidth Test Results

Author: Ethan Ace, Published on Aug 12, 2013

[WARNING: If you think surveillance is all about 'leadership' and 'salesmanship', leave now. This in-depth technical report exposes never revealed patterns significantly impacting bandwidth and storage.]

There's much more going on than might appear. Surely you are aware of the relationship between resolution and bandwidth. Hopefully, you also understand the impact of compression levels even with the same resolution. Many of you also know that bandwidth can vary depending on the scene (think stairwell vs. intersection).

Our testing started off with some experiments with the same scene but different FoV.

For instance, compare the images below. Which of these scenes consumes more bandwidth?

How about these?

We continued with more experiments. How about sharpness?

We went further testing the bandwidth impact of varying:

  • Contrast
  • Brightness
  • Color
  • Focus
  • WDR

Some of them were fairly constant, but many produced massive swings in bandwidth consumption. Even more fascinating, the results often varied across camera lines tested including Axis, Avigilon, Bosch, Dahua and Sony.

[*******: ** *** ***** ************ ** *** ***** '**********' *** 'salesmanship',***** ***. **** **-***** ********* ****** ******* ***** ******** ******** ************* impacting ********* *** *******.]

*****'* **** **** ***** ** **** ***** ******. ****** *** are ***** ** *** ************ ******* ********** *** *********. *********, you **** ********** ********* ** *********** ********** **** *** **** **********. **** ** *** **** **** that ********* *** **** ********* ** *** ***** (***** ********* vs. ************).

*** ******* ******* *** **** **** *********** **** *** **** scene *** ************.

*** ********, ******* *** ****** *****. ***** ** ***** ****** consumes **** *********?

*** ***** *****?

** ********* **** **** ***********. *** ***** *********?

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

  • ********
  • **********
  • *****
  • *****
  • ***

**** ** **** **** ****** ********, *** **** ******** ******* swings ** ********* ***********. **** **** ***********, *** ******* ***** varied ****** ****** ***** ****** ********* ****, ********, *****, ***** and ****.

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

Key ********

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

  • *********** ********* ******* *************, *** **** ****** ****** * ****** line, **** **** *** ***** ******* ********** (**********, **********, *********** levels, ***.), *********** ** *.* ** * **/* ******** ****** cameras ****** *** *** *****. 
  • ********* * *****'* ***** ** **** ******** ** *********** ********* variations (** **** ** +/-**%) **** ****** *** ***** ***** remained *** ****.
  • ********** ***: ****** **** **** ******'* ********* ** ****** ***** ** view ** * **** ************ *** **** ****** ***** ******** in * **%+ ******** ** *********.
  • *************: ******** ** ***** ******, ********* **** **** ** ****** ** a **** ******** ** * ******** ** ~**% *******. *******, The **** *****'* ****** ******* ********* *** *** *********** ******** in ********* *** **** ****** *****.
  • ********** *********: ****** **** ******* ******** ** ******* ********* ** **** camera ******** ** ~**-**% ******** ** *********, ****** ******* **** greatly ******* ** **** ******.
  • ********** *********: ********** ********* **** ******* ** ******* ******** ** ~**% increase ** ********* ** *******, **** ** ********* *********** ** image *******. ****** **** ******** ***** **** **** ******** (*****, blowing ******, *******, ******, ***.) *** *** ******** **** ** bandwidth.
  • ********* **********: ********* ******** ****** ******* ******* *************, **** **** ******** * much ******* ********** *****. *** **** ***** *** *******, *** sharper ** ******* ******* **** **** ************'* ********.
  • *** ****** ***** ******* ** ******* **** ***** ******** ** differences ** *********.
  • ** **** ******, ********* ********* **** *** *** ****** **, though *** ********** ****** ************* **** ***** ** *****.
  • **** ***** ******* *********: *** **** ****** **** *** **** *** ** ***** a ****** ***, *** ***** *** ********* *********** ***. **** being ******** *** ** ***** ******* ********* *********** **%+.
  • ******** *** ***** ********* ******: ***** ********* ** ******** *** ***** ******** ******** ** up ** **% ********* ** ********* ******** ** ******* ********. Increasing ***** ******** ** ******* ********* ********* ** ***% ** more.
  • **********: ****** ******** *** *****, ********** *** ********** ********** **** decreased ********* *** ** **** ** ******* ** ****** ******** images ** ************.

***************

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

  • **** **** ******** ****** ** *** ******** ***** *** ***. **** ** **** **** ********* **** ************ ******* (*** * portable **** *****) ******* ********** ** *** ** *** **** scene *** ***** *********** *********** *** ***** *********** **** ************* across *************.
  • ** ******* ***** ******* **************** ** ********* ******* ** ********* ******.
  • ******** ******** *********** * *** ** ****** *********, *** ** **** ** test ** ** ***** ** ****** *** ******* *********.

******* ********** ** ********* *** ** ****** ** ******** ***** settings, **** ** **********, ********, *** *****. *******, ***** ****** be ******* **** ********* ***** ** ***** *********** ****** ***** quality.

Wide **. ****** ***

** *****, ***** ****** ** **** **** **** ******* **** narrow ****** ** ****, ****** *** ** *** ******* ****** of ******* ** *** *****. *******, ***** ******* **** ******** pixels *** ****, ******* **** ****** ** ***** *******, ** found **** ********* *** ******** ** **** *****. ************, ******* in ****** ******* * **** ****** **** ** *** ***** when ***** ******** ****** ** ****, ******* ********** *********.

** ****** ** **** ** *** ********* ********* **** *** cameras. *** ********** ****** *** * ********* ** ***** ******* which **** ********** **** *****.

************

** **** *****, ** *** ** *** ******* ****** ** active ************ ****** **** ****. ******** ***** ******* *** ***** light ** ***** **-** ***** *** ****. ** ***** ********* increased ** *** *******, ** ******* ** **-**%. *** ***** NBN-733V *** ** ******* ** **** ****, ********** **** **********.

*****

** **** *****, ** *** ** *** ******* ******* * high ****** ******* *****, ** *** ** *** ****** *** running *** *******. ********* ********* ** ***** **% ** **** scene, *** ** *** ********* ******* ** ********** ******** **** in **** ******* ** *** *****, **** ** *** *******, track, ***** **** *****, *********, ***., *** ** ***** ********** to ******* ***** *** ***********. ** *** ****** ***, ***** ******* did *** ****** ** ****** ********, ** *********** *** ********* were ******* ***********.

****/******* ***

*******, ** **** ***** ** *** ** *** ******* ******* a ****** ****, ** *** ******* ***. ** **** ****, bandwidth ** **** ******* *********, *** ** ***** **** ** removal ** ***** (***** **** ****** ** *** ****) **** the ********** ** *** *****. ***** ******* **** ** *** narrow *** *** *** ******* *** **** ***** ** ****** as *** ****** ***** ** *** **** ***. **** **** in **** **** *** ***** ******** *********, ****** ***** *******. This ** *** ** ***** **** ** *** ****** ******* sharpness, ***** ***** *** **** ****** *** **** **** *********** in *** *****, ********, *** ****** ******* *** **** ***** cameras ** *******.

*********

********* *** ********* ** ********* ******** ** ***** ********** ** bandwidth. *** ******* ** **** **** **** ********** **** ********** patterns ** *** *****, ********* *****, ******, ********, ******, ******, and ******. ******* ***** *** ********* *** ********* *** ** the ********** ** ***** ********, ********* ** ******* ****** *********. We ****** ********* ** ******** ******, ** ******* ******* *********** in ***** *******. ******* ****** ******, ********* ** ****** ************, model, *** ******** ****.

*** *******, ** *** ****** *****, ***** *** ********** *** visible ** *** *******, *** ********** ** ******* ******* ** the ******* *** ******** ***** ** *** ***** *** ***** relative ** ********* ** *** ********, **** *****, *** ***** cameras. ****** *** * ***** ********* ** ****** (***** ***** for **** **** *******).

*******, ** ******* ******, **** ** **** ******* ****, *********** in ******* ******* **** *********** ** **** *******, ****** *** Q1604 ******* ********** ********** (***** ***** *** **** **** *******).

*****, **** **** ***** ***** ******* **********, ***** *** ** standards *** ********* ******* *******, ******* ********, ********, ********, *** adjustment ****** **** ************ ******* ******, **** **** *** **** manufacturer. *** *******, *** **** ***** *** ***** **** *** sharpest ****** ** *** **** ** *** ********. ** *** minimum ********* (* ** * ***** ** ***), ** *** sharper **** *** ******** **'* ******* (*** ** * ***** of ***), ** **** ** **** *****, ******* **** **** detail ** *** ***** *** ****** **********:

*** ***** *******, ***** ***** ****** ****** ** *** *** ******* of ****** ***** *****, ** ** **** ********** ** *********** between *******, ** **** **** ** ********* **********.

Focus ******* 

**** **** *********, ***** ******* ** ***** *** ************ ****** bandwidth. *** ** ****** ********** ** ******* *********, ********* ** reduced **** ******* *** **** ******** *** ** *****, ******* differences ***** *** *** ** *********** ********** ******* ***** **********. This ********** ***** **** ********* ** **** ****, ***** ** Axis ****** ** ** *******:

 

WDR ** **. ***

** **** ** *** **** ******, ********* ********* **** ******* WDR ** ******** ** ***. ** *** ************ *****, **** was *** ** ********** ******* ********* ** ******** ****** *****, such ** ***** *** ********* *** ****** ****** *** ******. Turning *** ** **** ********* ******** ** *** ******* ** the ******* *** ** *** **** *****, ********** ***********.

** *** **** *****, *** ***** ********* **** ******* ** the *****, **** ** *** *****, *****, *** ***** ******** in *** **** *****, ********** *********, ****** *** ** ************* as *** ************.

****** *** ***** *** **** *********, *** *****'* ********* ********* in *** ***** *****. **** ** *** ** *** ******'* WDR ********, ***** ********* **** **** *******, *** *** ****** to ***** ********** *** *** ****** ****** ** *** ** the *****. **** *** ** **** ******** ***** ** *** image, **** ** *** ***** ****** **** ** *** **** field, *** *** ********* ***** ****** ***.

Other ***** ***********

** **** ******** ***** ***** **********, **** ** ********, *****, and **********. **** *********, *** ***** ** ********** *** ******* settings ****** ****** ******* *******, ** ******* ** ********* *** image ******* **** ***********. *******, ** *** *****, ********* ***** factors ********* ******* ** ** ***** ****** ********* *******. ***** may **** **** ***** **** ********* ***** ******* ********* ********, but *** ******** ******* ** ***** ******* *** ********* **** to *** ** **** ****** *** ******** ***** ***** *****.

********

****** ******** ******** ** **-**% ********* ** ********* ** *** the ******* ** ******. *******, ***** ********** ****** *** ******* to *** **** ******* *** ******, ********* ** * ********* dull ******* *****. ******** ********* ******** ** *** ******* ********* spikes ***** ***** **********, **** ** ***** ****** *******.

**********

********* ********** ********* ******** ** ******* ********* ********* ******* **-**% compared ** ******* ********. *******, **** ***** ********* *** **** substantial ******** ****** ** ***********, ********** ** *** ***** ********. Unlike ******** *** *****, ********* ** ********** **** ** ********* in *********, ***** *** ***** ******* ****** ***, **** **** of ** ********* ***** *****.

*****

******** ***** *** *** ******** ****** ** ********* ** ***** settings ******, ** ******* ** ***** **% ******** ** ********. However, ********** ***** *** **** ******* ******, ********** ********* ** about **%. **** **** ** ******* *******, *** ****** ******* monochrome, **** ** ***** *********** **********, ***** ** *** **** end ******* **** ** ************** *** ****.

Comments (26)

*****, *** *** *** ***!? ******* ******* ** *** **** cab **** ** ***** ** ***. **** *** * ****** cool *******. **** ******** ****. * ** ******* **** *** 6 **** ******* ******** *** ******* *** * **** **** a ***** ** ***** **** **** ******. **** ** *** good ****.

*****, **** ******. *** ***** ***** ******* *** *** ** in-camera ******* ***** ** ****** *********,******* *** ***** ** ***** ** ** ********. * ***** this ****** ** *** **** *** *** ************* ******* *** have ******* *****?

[**** ********: *** *** ************ ********* ******* ******* *****?]

***** ******!

*****,

** ***** *** ************ ******* *** ********* ******** *** ***** compression ******** **** ** *** **** ********* **?

*** *******, ** ** ******** *** ***********....*** ** *** ********* to **** **** ** *** **** ******?

** ***** ** **** ** ******* ** *** ***** ** these ********** ** *** ********** *******. ** *** >>>> *********** >>> ********* ** *** >>>> ********* >>>***********.

**** ******, ***** *** **** ***** ********** *****:
*** ** *.*** ** ******+ ***********.

*** ******* *** "*****-******" ******* **** ******* ******** ** ***** Supreme ****** *******. **** **** ** ** ***** ***** ******* and **** ** ** ******** ****** ******* ** ******* **** or ***** ******* ** * ****** *****, ******** *****'* ******, only *** ***** **** ****** ****** *** ********* *** ******** in *** */****** ***** ******* *** "**********" ******* ** *** set **** ** ***** **********.

**** *** * ********* ******** ********** *** **. ******* **** of ********** ***** ****.

******* ***** ***** ** ** *********** ****. ***** *** *****!

***** *********** *****. ***** *** *** **** ****.

* ****** *****, ** *** *** *** ****, *** *** we ******* ********** ** ********* & ******* *********** **** **** test *******?

*** **** ****** ** ********* ******** ******** & ******* ***** is ** **** **** ***** ***** **** ******* ** *** end-user ******** *** ******* *** **** ******* *********.

*** ** ** *** ****** ******** ** ***** *** ********. In **** ***** *** *** ***** ************ ******** *** ** a **** ***.

@ *** ********:
********** * ********* ***** ******** *** ****** *** ******** ***********.

**** *** * *** ** *** *****-**** ******** ******* ************ bandwidth, ********** ***/** ******* ************.

*******(***** ******* ******* **** ********* ****** ***** *.*** ******** *******):

****/** @ ***** = +/- *.***** ***
**** @ ***** = +/- ***** ***
***** @ ***** = +/- ***** ***

** ** ****** ** *** ****** ******** *** **** ** cameras ********* ** **.****, * *** ********* ***** ** * 4Mbps = (******* ********** *** ********* *********** *** ********)

**** **** * *** ******** **** *** ***** ****** *********** based ** ***** *** ***, ****** ****** ****** ***** ***** and ** ****** ********* ****.

*** ****'* **** **, ** *'** ***** ** ******* *** back ** *** *** **** ***. ******* ***-***** ********* *** push * **** ** *** ****** (*.***) ***** ** ** 16+Mbps *** ****** ********* ** ****** *** ****** ******* ** even ** ***** **** ********* * *** ****'* *** ******* of *** ********** **** *******.

** **** ***** ** * **** ** *****, ******* *** balance ******* *******/******** ** ** ****:

*.*** & ****

* **** *** * *********

@ ****, **** **** ********* ***** *****.

**** ******* **** ***** *'* **** (***** ******) *** ******* INSIST ** *****. *****'* ****** *** **** *** *** *** explain ** **** *** "**'* *** *** **** ***'*"...

** **** ** ********* ** **** **** *** ***** **** them **** ******* ************ ** ******** ** *** ***-***** ******* 180+ **** ** ******* *** *********** ********...

*******,

**'* * **** ** ********! ********* *** ******** ** ********* easier **** ******* *** *&*'* ** **** ********** **** ***** requirements...

** *** * ** * *** *** **** ******* & 12 ** ** *** *** ******* ***** *******. **** ****** the ******** ** **********.

Stephen *********** : Vivoteks solution sounds interesting, it's very similar to a ********** * ***** ***** *** (* **** **** ***** *** **** *....., but * ** ******** ** *** ******* ****** **** ******* in **** **** - *** ****** ****** **** **** * think).

*'* **** ** **** **** ***** *** ******'* *********** ********; using ** *** ** ***** **** ** ****** ** ****** like * ******** ****, *** ** **** ***** * ********** kernel ** *** *** ***** **** ** *** ** *** compressor. *** ********** ****** **** ***** ***** ***** ** ** amplified, *** ***** **** *****'* ******** **** (******* ****** *** *** ** * ** ***). *** ****** *** ****** *** * ********** ****** **** the ***** **** ** *** **** ******** - ** *** can ****** *** ** ** ** ********* (**** **** ******* encoding ********* ***, *** ** *** *** *** *********** *** much, **** ****** ** **********).

*******, *'* **** ***** ************* ***** ** *** ******** *******. I **** ***** * *****'* ******* *** **** ** ** on * ****** **** ** ******* ** *** **** **. one **** ** ********** - *** ** ***** **** **** any ****** ********* * *** **** ******.

* ******* *****'* *** **** *** *** ** - ** the ******** ******** * ******* *** *** *******, **** *** just **** ** ****** *** ******* ************ ***********, ** ** customers ********* ****** ******** *** *** ** ***** *********? *** big * **** ** *** ****** ** ******* *********? * would ******* ** *** * ****** ***** **** ** *** system.

******,

** ******* *********** ** *** *********** ******** *** * ******. Good ***** ** *****. **** ** * ****** *** ** a ***** *** ** ** *** **** ********* ***** **** is ********* ******. *******, ** ********* **** *** **** ************ that **** ** ** ** ********.

** *** **** ********: "*** *** * **** ** *** budget ** ******* *********? * ***** ******* ** *** * fairly ***** **** ** *** ******."

******* ** * *** ****. **'* *** ** *** ** the ******* ******* ***** ** **, *** ~**% ** ** entire ****** ** *** *********** *** ****** *********** (****** ** obviously ******* ** ***** **** *** ******* ********, ***** *********** vary ************ - ***:***** **** *****,******* ******** *****).

*** *** ***** **** ******* ** **** ********** ** **** a **** ** *** **** (***** *** ** **% ** common) *** **** ** ***** ** * ***** ******** ** the *** ** *** ******* ("**** ** *** ** ** but ** **** **** ****"), ***** *** ********** *** *** user **** ** ****** *** **** **.

***********, ** ******** *** * **** ********** ********* ******* ******* *****. ****** *** ********* **; *'** *** * **** ** the ******.

****, **** ******** **: *********/***********. *** ****** **: * ***'* think **, ****** * *****'* ****** **. ********* ** * big *******, ********, *** ***** ********* **** **** ***** ** on *** **.

*******, ****** *** *** *** ** *******. * **** ** a ****** ************* **** **** ****** ******* ** ********* *********, but **** ** *** ***** * ******** ******* ** ******* changing ***** ******* ***********. ** *** **** **** ****. ** far ** ***, ** ***** ** ********* ** **** ***** now ******* ** *** ****** ******* **. **'* ********** **** to, *** ** ***** **** ********** *******.

** ***** ************ ***** ** ******, "* **/* *** * resolution *** * ***** ****". ****, *** *** ** **** but *** *** ****** ***** ** ** *** ********* ****** you ************ *** *** **** ****** ** *** **** ********** (i.e., *** ********** ** **** ******** *** *** *** *** model ***).

** ***'* ********: "** *** *** *** ****, *** *** we ******* ********** ** ********* & ******* *********** **** **** test *******?"

* ***'* *** *** **** ***. ******* *** **** ** narrow *** **** ***** **** *** **** ** ******** ******* in * *** ** ******** ********** ** *** ***** **** but ************* **** *** **** **** *** ******** ** *********, roads, ***. ****, ***** ** ********** ****** ************* ** ****** model, **'* **** ** ******* * *** ** ***** ** without ********* ******** *** ******** *** ***** ******.

**** - ***** ****, ***** *** **** ****.

****** ******. *****, ***** *** ***** *** *** ****, * just **** ***********.

**** ****** ** * ***** *********** ** *** **** ************* BW *** ******* *********** **** ** **** ***** ***** *********** (Axis, *******, *******,..) ***** *** "****" **********. ***** ****!

**** ********* ***** "*** ********":

** **** ******, ********* ********* **** *** *** ****** **, though *** ********** ****** ************* **** ***** ** *****.

** ************ ** ******* ********* ***** "*** ** ** ***":

** **** ** *** **** ******, ********* ********* **** ******* WDR ** ******** ** ***.

** * ******* *********?

** *******, *** ****'* ******* *********. *** ****** * ****. It ****** *************** **** *****. *'** ******* *** ******.

***** ** * ******* ** "********** ***", ***** *** *** findings. ** ****** **** ****** **** ********* ** ******.

***** *****. ***** *** *** **** *********** *******.

********** *** ***: ****** ** *** **********, ****** *** **** not ***** *** *** ********* ** ****** **** *********. ** depends *** ******* ** *** *****. *** *** *** *** Details ****** * ***** *** *** ***** ** ********.

****, *** ** **** **** ********* *** *** ***** *** road ** ***** **** ** ***** ********* ********* ******* ** the ******** ** *** ****, ***** *** ***** ** **** of *** *****.

** ***. **** ***** **** ** *** ********* *** *****.

* ***'* **** **** **** ******* *** ******, ** *** anybody ***** *** **** ****.

* ** **** **** ******** ** * ** ****** ******, at ***** **** **** **** * *****!

***** ******* *****.

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