Bandwidth Guide For Video Surveillance

Author: Ethan Ace, Published on Sep 11, 2014

Bandwidth is one of the most fundamental, complex and overlooked aspects of video surveillance.

Many simply assume it is a linear function of resolution and frame rate. Not only is that wrong, it misses a number of other critical elements.

The most basic commonly missed element is scene complexity.

Contrast the 'simple' indoor room to the 'complex' parking lot:

Even if everything else is equal (same camera, same settings), the 'complex' parking lot routinely requires 300%+ more bandwidth than the 'simple' indoor room because there is more activity and more details.

Making it tougher, while it is easy to contrast scenes like the 2 above, there's no simple way to gauge relative scene complexity. And, even with scene complexity factored in, many other drivers exist.

In this industry leading guide, we break down 10 total drivers including:

  • Resolution: Does doubling pixels double bandwidth?
  • Compression: How do compression levels impact bandwidth?
  • CODEC: How does CODEC choice impact bandwidth?
  • Framerate: Is 30 FPS triple the bandwidth of 10 FPS?
  • Low light: How do low lux levels impact bandwidth?
  • Field of view: Do wider views mean more bandwidth?
  • Sharpness: How does this oft-forgotten setting impact bitrate?
  • WDR: Is bitrate higher with WDR on or off?
  • Color: How much does color impact bandwidth?
  • Manufacturer model performance: Same manufacturer, same resolution, same FPS. Same bitrate?

Understanding bandwidth is critical because it impacts network load and storage use / cost.

********* ** *** ** *** **** ***********, ******* *** ********** aspects ** ***** ************.

**** ****** ****** ** ** * ****** ******** ** ********** and ***** ****. *** **** ** **** *****, ** ****** a ****** ** ***** ******** ********.

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

******** *** '******' ****** **** ** *** '*******' ******* ***:

**** ** ********** **** ** ***** (**** ******, **** ********), the '*******' ******* *** ********* ******** ***%+ **** ********* **** the '******' ****** **** ******* ***** ** **** ******** *** more *******.

****** ** *******, ***** ** ** **** ** ******** ****** like *** * *****, *****'* ** ****** *** ** ***** relative ***** **********. ***, **** **** ***** ********** ******** **, many ***** ******* *****.

** **** ******** ******* *****, ** ***** **** ** ***** drivers *********:

  • **********: **** ******** ****** ****** *********?
  • ***********: *** ** *********** ****** ****** *********?
  • *****: *** **** ***** ****** ****** *********?
  • *********: ** ** *** ****** *** ********* ** ** ***?
  • *** *****:*** ** *** *** ****** ****** *********?
  • ***** ** ****: ** ***** ***** **** **** *********?
  • *********: *** **** **** ***-********* ******* ****** *******?
  • ***: ** ******* ****** **** *** ** ** ***?
  • *****: *** **** **** ***** ****** *********?
  • ************ ***** ***********: **** ************, **** **********, **** ***. **** *******?

************* ********* ** ******** ******* ** ******* ******* **** *** storage *** / ****.

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

**********

** *******, * ****** ************ ****** ******* ***** ***** (***, 2MP, ***.) *** *********. *******, ********** ****** ************* *** ****** are ***********. ** **** *******, **** ******* ******** ** * far **** **** ****** ***** (*.*., **** **% **** ********* for ***% **** ******) ***** ****** **** ** *** ******* than ****** (*.*., **** ***% **** ********* *** ***% **** pixels). ***** **** ** ******* ******* / ******* **** ************* why ****** ******** ** ***** **** ** ********.

** * **** ** *****, *** *** *** ** ***** when ********** ********* ********** ****** **********. *******, ** ******** ********* measurements ** ****** ******* ** **** * **** ** ***** may ** *** ** * ***.

***********

***********, **** ***** ** ************, *** ** ******* ************ ** bandwidth: *** ****** *** ***********, *** ***** ********* **** **.

********: *********** *** ********** *** *** ********* ******. ** **** courses, ** ********* *** ************* *** *** ***. **********, ** our ********, ** *** ****** ** ****** ** ** ***** / *****. *********** ** *** ******* ********** ***** ****** ***.

*** *******, *** ***** ***** ***** *** ****** ** *********** across **** ********* ******* (****: **** *.***, ************ / *********** is ******** ** * ******** ***** ** * ** **, higher ******* **** ***********, ***** *******).

******** ************ **** ** (**** ***********) ** ** (*******) ******** in ** ***** * ** ******** ** *********, ***** ******* lowering ** ** ** (**** *** ***********) ******** ********* ** 5-11x ********* ** *** ******.

************, ************* *** ********* ****** *** *********** *** ***** *********** levels **** **** ****** ****** ********** ** **** ****** ************ level ** ****. **** *** *** * ******* ***** **** 1-100,***** ****** *** ****** **** ** "***, ****, ****", *** others *** *** ****** *-** ************ *****. **** ***** ***** just **** ** *** ******* ** ***:

*** ***** ****** ************ *********** ************* **** ****** ** ************* ************ *********** *** *** ** standardize * ****** ****** ********* *****.

******

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

  • *****-***** ****** **** ** *.*** *** **** ******** ******* ****** in ** *****, **** ********* ******** ****** *** ******** **** the ******* ** *** ***** **** ***** ** *****, *********** a ***** ********* *******. *** *******, ** * ******* ***** through ** ***** *******, **** *** ****** ********** *** ****** between ****** *** *** ***********, ***** *** ****** ********** ** not.
  • *****-***** **** ****** ****** **** ********** ***** ** ** *****, compressing ******* ****** ** *************. **** ******* ** ****** ********* ** **** ***** **** be **-******* *****, ********** ** *** ******** ** *** *****.

*** **** ******** ** ******* ** *** *****, *** *** the **** ******* *****, *** *.***, *** ** *** ********* advantages **** ****-* *** ****** ****. ** ****.*** *******- ******* *** ********* **************, *.*** ******** *** **** ********* ** *** ****** **** MJPEG, **** ** *** ***** *****:

*** **** ** ***** *** ***** ***** ***********,*** *** ***** ********.

*-****** **. *-******

** *****-***** ******, ****** ***** ******* *** **** ***** ** view *** ****** *-******, ***** ***** ******* **** ******* *** P-frames. ******* **** ******* * **** *****, *** **** *-****** in * ******, *** ****** *** *********.

** ****** *** *****, *** *-***** *** ****** ** *** best ******* ******* ********* *** ***** *******. *** *** *-****** may ********** ****** *******, **** **** "******" ** ******** *********, while **** **** *** *-***** *** ****** ******** ****** ** no ******* *******, **** ** **** *****:

******** *** ****** ** *-****** (****** **** * ** * to * ****** ********) ******** ******* ********* **********, ** **** below, ******* *** ****** ******** ***** ******* ******.

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

*** **** ******* ** * *** * ***** ****** ** bandwidth *** ***** ******* *** ****.*** * ** * ***** ****.

Frame ****

***** **** ******* *********, *** *** *****-***** ****** **** ** H.264, ** ** **** **** ******. ** ** *** ******** frame **** ** ***, *** ******** ** ********* ** ****** to ** *** ****, ***** **** * ** * ***** more *********. ************ ****, ** **** **, **, *** * fps ************ ** *********** *** ****** ** *** **** ** a ********** ******* ** *** ********** ****. *** ******* ******** were ** *******:

  • * ***: *.*** **/*
  • ** ***: *.*** **/* (*** *** ****** ** * ***, but **** ** *********)
  • ** ***: *.*** **/* (** *** ****** ** ** ***, but **** ****** *********. *** ****** ** * ***, *** only ** *********)

(***** ************ **** **** ** * * ***** *** ****** with ************ ************ ~**.)

*** **** ****** ** ***** ****'* ****** ** *******, *** our***** **** ***** *** ***** ************.

Low *****

******** ** *** ****, *** ***** ******** **** ** ******* of ****** ***% ****** (**** *****). **** ** ****** ****** by ********* ******* ***** ****** ** **** ****** ** ****.

*******, *** *** ************ *** ************ **** ** ****** ****:

  • ******* ***** ******************* **** ******** ** ****** *****, ******* ******** ***** ****** on **** *******.
  • ********* *** ** ********** ** ******* ******* ** ******* ****** at *****. ******** ** ****** ***% ** ***/***** ******, ********** IR ******* ********* ** ** ******* ** ***% *** ** IR ************ (**** *****).

*** **** ******* ** *** *****'* ****** ** *********, *** our********* ** *** ********* ******.

Camera ***** ** ****

***** ** ****'* ****** ** ********* ****** ********* ** ***** width ******* **** ******* ******* ** *** *****. ** ****** with ***** ***** ** ****** *******, **** ** ***** ** other ******* **********, ******** *** ***** ** **** **** ****** increase *********. ** ****** **** ********** *** ******** *** ********** backgrounds, **** ** ******* ****, *******, ********* ****** ** *****, etc., ********* *** ***** ** **** **** ******** ********* *** to **** ** ***** **** ******* ***** ***********.

*** *******, ** *** **** ***** *****, ********** *** ***** of **** ******* ** * ~**% ******** ** ********* *** to **** ****** ******* *** ******* ** *** ***** ******** to *** ******** ***** ** ****.

*******, ** * ****************/**********, ********* ********* ** **** **% ** *** ******* ***** when ******** *** ***** ** ****. ** *** ******** ***, more ******* ** ********* *** *******, *** *** ********** ******* of *** ******* ******* *** *** ** **** ** ****, making *** ***** **** ********* ** ******.

*** ******* ******* ** ***** ** ****'* ****** ** *********, see *********** ****** ********* ****.

*********

********* *** * **** ****** ** ********* ***********, *** ** is ****** ********** ****** *************, **** ** *********** ***********.********************* **** **** (****** ****** *********** ******) ******* ** *** scene, **** ** ****** *** ****** ********, ***** ** ****** and ****** ** *****, ***. ******* **** ****** ** *****, bandwidth *********.

*** *******, ** *** *** ***** (**** *********** ****** ********* ****), ******* ********* ** ****** ***% **** ******* ** ******* sharpness ** **************, *** ****** ***% ** *** **** *****.

Wide ******* ***********

***'* ****** ** ******* ****** ********* ** *** ****** *** the *****. ***** ****** ******** **** *********** ****** ********* ****, **** ********* *** ** ** ** **** *** ** an ******* ************ *****, ********* *********, ** **** ******* *** visible (******* *** ***** ** *********, ** *** ********, ***.).

*******, ******* ** ** ******* ***** *** ****** *****, ********* decreases. ** **** ****, *** ***** ********* ******** ******** ** some ***** ** *** *****, **** ** *** ***** *** bleachers ** *********/****** *** ***. ******* ** ****, ***** ***** *** **** similarly ******* *** ****** ** ********, ******** *******.

**** **** *** ***** *******, ***** ******* *** ****, ********* on *** **** **** ****** ***** *** **** *****, *** they ****** ******** **** *** ** ****** **, *** ****.

*****

** ********* ****** (******* ************ ** ************** *******), ***** *** minimal ****** ** *********. ** *** ******** *****, ****** **** default ***** ******** ** ********** ********* ********* ** ** **/*, about ** *% ********.

*******, ************** *********** ********** **** *********. ** **** *******, ********* ********* ** over ***% **** ******** ***** ******** *********** ** ***** ******* *****, ***** **** ******* ************** ******* such ** ***** ******** (**** ** *** *** *****).

*** ********* ******* ** * *********** ************ ***** ***** ** 'save' ********* ********* ********* ******* **** (***** ** ****** ****).

Manufacturer ***** ***********

****** ******** ****** ** * ***** ************'* ****, *********** *********** in ******* *** *****, ******* *** ******* ***** *** **** resolution *** *********. **** *** ** *** ** ********* ***** sensors ** ********** ***** ****, ********* ******* ******** ** **** model, ****** ** ***** *** ***** ***********, ** *** ****** of ***** *******.

*** *******, *** ********* ***** ***** *** *******, ** **** Q1604 *** **** *****, **** ****, ** ***, *** ** a ~**' ********** ***, ** *********** ** ~***. ******* ***** factors ***** ************, ** **** **** *** ****** *****, *** Q1604's ******* *** *** **/* ***** *** ***** ******** *.** Mb/s, ****** ** *** *********.

Measure **** *** *******

** **** ***** *****, ***** *** *** ****, **** ***** for ********** ********* (*** *********) *******, **********. *** **** ******* impact **, *** **** ** **** *** ****** ** ********** to **** ******* ****** *** ******.

****** ** ** ********* ** ********** ***** ******* ****** *********, use **** ********* **** **** *** ************ ** *** ******* you **** ** ******. **** **** ****** *** **** ******** estimates *** ******** *** ***********.

Comments (16)

********* ******* ***** !!... **** ** *** **** ****. ** only *** **** ********** ** ******** *********** *** **** ** in ***** ** ********* **** ** ********* ******* **** *********, I ***** **** * *** ** ********* ********* .... *'** heard ****** **** ** ******* ** ** *.** ** **** (misleading ********* **** ** *** ********)...

******* ** ***** **: *****, ***** ********, ** *** ********. HSDPA ** ** ******** ** **&* *** *** * ************ tech ******* ** *** **. ***** **** * *** ************ network ********* ****** ** *.**, *.***, ***. ********* *** ************ standards ****'* **** *** ** **** ************ ** *** ** label.

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

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

:)

*, ******,***!

**'* ***** ****** **** ** ***** ** *******, *** **'* not ***** ** ***** **** ****** ** *** ***** ****.

**** ****, ** ***** **** ** * *********** ******** *** industry ****** ** ********* *** *** ** ** *** ** our*******.

*****, **** *** *** ********** **** ** ******* *** ***** rate ****** ** *********?

**'** **** ******** ***** **** ***** ** ******** *********** (** and **) **** *** *****. *** ********** ****** ******* *** same *****.

*****, ****** *** ************ *******.

*** ********;

**** *** ********** **~**% ********* ***** ** *** ********** ********* bandwidth ** **** ******. *** *******, ** *** ******* ** 1GB, ** ** **** *********** ** **** ****** ********* ***** of ***~*****.

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

******, ********* *** ****** ***** ** * **-**% ********* ******, so ** ** ** ***/*, **** *** ***-*****/*. *********, **'* the ***** *** ******.

***, ** *******, ******* * **** ***** *** ******** *** measured ** **** (***** **** *). ************ **** *** ****** (b/s).

**** ****-******** **** ** ***** ** *********** ********** *** *** packet ******** ** ***/**.

** ********** *****, ** *** **** * ***** *******, *** you **** *** ** **** ** ******** ****** *** *******, you ****** *** * ******** **** ** ** ******* (*** = ****). ******* ***'** ****** *** * ******** **** ** at ***** ** *******, ******* **** **** *** ** ** broken **** ******* *** *********** ** ******. *** ******* ** adding *** *********** "*******" ** *** **** ******* ****** ******* more **** ** ********. *** **** **** **** ********** **** other ******* ** *** *******.

*** **** ** ***** *** **** * ***** ******* *** transfer ****** **** ** * **** ** ***** **% **'* rated ******** ***.

**** ******* ******* *** **** **** ** ** ******* **** even **** *** ********, *** ********* ****** ** *** ****** is *** ****** ***** ** ** *****. * ****** **** a ***** *** ******* ***** ******** *** ** ************ *.***** or **** ** *****.

** *** **** * ********* ******* *** *******/******** ****, * would *** ** **** **** **% ** *** ***** ******* speed *** ******* *********. **: * ******* ******* ***** **** 70Mbps ** "******" *********. ** *** **** *** ******* ****** at *****, *** ****** ** **** ** ******* ** ******* on **** ******* ******* ******* **** ***** ******* ********** ******.

** *** ******* ** ******, ** **** * *** **** variables.

* *** ********* **** ** **** *****, **** ******, ********* models ***** **** ****** ** ********!. *** ******** ** ** mind **: ***** ** **** *****? ***** ** ** **** efficient? ********* ** ***** ************* (+***, +***... *******).

** **** *******, **** ***** **** *** **/* *** **** M3004 **** *,*** **/*, ****** **** ***** *******, *** ***** almost ** ***** **** ********, ** * ***** ******* **** cameras ** **** *******/**** ** ****** ****, **** ******** ** the *** ** ******** *** **** *** ********* ***, **** space ** **** ***** ** ** **** ** ******** *****.

******* ***** **** ** ***** ****, ****** $*** **. ***** at $***. (********* *****)

**, ** * ****** **** ***** ** *** ******, **** more ****** ** ******* **** *******, *** **** **** ** spend **** ** *** ******* (**** ***** ** ***/*******) *** more **** ****** ** *** ********?

** **** ** **** ** **** **** ****, ***** ** can *** **** **** ******, *** **** ** *** ******* of *******, ******** ***** ** *** ***** ***** ** ***** more ** *** ****** ****, ** **** ** *** *******/******* side.

******* ******** *** ****** *** ********** ***** ****. * ***** link ******** **** **** (*** *******) *** ***** *******. ****'* a *** ** ******* *** * *** ** *****. ******* topologies *** ** ******** ** ******* *** ********* ****** ***** without *** **** ********** ****. *** *** ******* ************ ********** and **** **** *** ***** ******* ***** ** ************. ** while **** ******* ********* ** ********* ** ******* **** *******, I ***** ***'** **** **** *** ********** **** ***** ** comparison ** *** **** ** *******--********** ** **** ********* ***** are *******.

*****, *'* ******** *** *** ****** **** ****. ****** ********* the ******** * **** * ******** ** *******: *** ***** Bandwidth *** *********** ******* *** **** ********** ** *** ********* (i.e. ***** ** ********)?

******** *****'* **** ** ***** ****** *, ** *'* ********** that *** ********** ** *** ******* ********* ** ***'* ****** based ** ***** ** ********.

*** ***** ********* ******* *** *** **** ******* **'* ***** or ********. *** *** ********** **** ******** (*********) ** ***** you **** **** ** ** *** ******** ********* ** **** stable. *** *******, **** ***** *** ********** ** ********* *** going ** **** **** ***/* ** *****/* *** **** ******** bandwidth ***** ****** ** *** **** ********* ** *** *******, what ***** ****** *** ****** ** ******, ** ***** ****, etc. ** ***** ***** ******** ** ***** *.

******** #*: ******* ** ********** ********* ** ** ******* **** ** *** ****** ****'* ** the **-**** ********. ** **** **** ** **** ** ***********?

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

****, *** **** *** *** **** **** ********. ***** **'* a *** ****, ** ***'* **** ****** ** ******** ******** (by **********). **** ****** **** **** ******, **** **** ** print ** ***, **** ** **** ****.

**** ** * ***** ***** **** ***. **** ********* ***'* understand **** *** ******* **** **** ******'* ** *** **** way **** ****.

******

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