Tested: Lowering Bandwidth at Night is Good

Avatar
Ethan Ace
•Published Dec 29, 2014 05:00 AM

********* ****** ** *** ***** *** commonplace,**** ********* ** *** ** ***% over ******* ******.

**** ********** ******** ********* ****** ** night, ******** ** ***** ******. *** example, ** **** ****** ******** ***/* during *** ***, *** ****/* ** night, *** *** ****** *** ** to ***/* (** **** ****) ******* any ******* ****.**** *** ****** ******* ******* ***** by **%.

** **** ******, ** ***** *** test ******** ** ******** ******* *** to ******* *********** ****** *** **** to **** *********** ***** ** ****** the ********* *********:

  • **** ******* ********** **** **** *********** video **** ** *** *****?
  • *** ***** ******* ** **** ******* more ********* ** ******* ** ****** compression ******?
  • *** *** **** ******** ** *********** impact *********?

Key *******

***** *** *** *** ****** **** this ****:

  • ********************* (*.*. ************) **** ** ** ** *** little ****** ** *** ***** (~*.** lux) ***** ******* ** **** **** PPF ****** (**+) ***** ********* ********** bitrates ** ** ******* ** **%.
  • **** ** ********* **** *** (***+) were ******** *********** ** ******* ****, with **** ********** ** ******* ******** and ********* ********** ** **** ****.

Why **** *******

**** *** '****' ************ ******* ******** with ******** *** *****. **** **** produce * '******' *****, **** ** almost ****** ******* ** ******** ***** image ********** /**** *******. **** **** ******* ********* ******* noise ***** ** **** ****** ** encode / *********** **** ******* *****, spiking ********* *** ******* *****. ****** advancing******* ***** *********** ******** **** *** ********, ********* consumption ** ***** *** ****** **** the ********** ******* *****. *** **********, see:*******: **** / *** ****** ** Surveillance ************** *** (******* ***** *********) *****.

Recommendation: *** ***

***** **** ******** ********** *** ************** of *** ** **** ******** *** CODEC *************, ********** ********* ** ****** ** *** ** *** ******. ******* ********** ******** ** **** streaming ****** ***** *********** ******* ***** quality ******* *** **** ******* ** performance. *** ***** ***** ******* ****** such ** ********* ******* ***** *** artifacting ****** ***** ******* *** **** than *** ******** ** ************ **** when ******* **** ***** *** ***.

Compression ****** ** *******

*** ********** ** *** *********** ** set *** ********, *** ***** ****** ************ *********** **************** ** ******* ***** ******* / Compression *************.

Image ***********

*** *********** ***** ***** **** ****** at ******* *********** ****** (* **) and ** **** **** (* **) that ****** ********* *********** ** **-**%.

****** ******* *** ***** ********** *** similar ** **** ************ ******, **** no ***** ***********. **** ** *** camera (*, *****) *** ****** ******* moderately ***** ** *** ******** ** Q28 *** **** ** ******* ** an ********* **** ****** ***** / FoV.

IPVM Image

Bandwidth **********

********** ************ **** ** ** ** resulted ** *********** ******* **********, **% on *******, **** ** *** ***** below. ****** *********** ******* ******* ********* from ******* ***** ******* ** *** light ******, ** ***** "***********" ****** larger *** **** *******, ********* **** bandwidth.

IPVM Image

Greater ****** ** ******* *****

******* ** ***** ******* ********* *********, it *** ** ******** ** ******** compression ** *** ****** **** ****, even ****** *** ***. *******, **** quantization *** **** ******* ****** ** daytime ***** **** *** ***** ******** seen *****, ** **** ** *** recommended.

*** *******, *** ***** ***** ***** the ******* ** ********* ************ ** full ***** (~*** ***). ****** ******* become **** ********* ** *******, **** macroblocking ****** *** *******'* **** **** pixelated *** *******/*******. *** **** ***** becomes **** ********* ** **** *** at ***** */* *** ******, ** well.

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***********

******** ******* / ********* ** *********** settings ** *******, ** ***** *** materially ****** ******* *****. *******, ***** if **** ******'* ********* *********** ****** at ***** (**** **, **** **** IR). *** ***** *******, ********* * VBR '***' **** ** ******* **** your *** **** ******* *********** *** a ******** ** **** *** ******** stream ** ********* ** *****.

** ***** **, *** *** **** 50% ** **** ********* ** ***** while ****** ********** ****** ** ***** quality.

Comments (4)
SP
Sean Patton
•Dec 29, 2014

Awesome report Ethan, I had started doing this in the last 6 months with no complaints, but not a lot of feedback either.

(1)
Avatar
Jonathan Lawry
•Dec 29, 2014
Trecerdo, LLC

Thanks! No more complaints from the family at night when my home-office exacqVision system would slow down the network.

U
Undisclosed #1
•Dec 29, 2014
IPVMU Certified

In those cases when available, would it be correct to set the compression levels directly thru the use of distinct day/night profiles, in addition to the VBR setting?

(3)
JH
John Honovich
•Dec 29, 2014
IPVM
In reply to Undisclosed #1

Yes, good point, for those manufacturers who support it.

(2)
(2)