The Impact of Network on Video Quality - Michael McNamara

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29 Οκτ 2013 (πριν από 3 χρόνια και 7 μήνες)

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©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

#
AvayaATF

The Impact of Network on
Video Quality

Anatoli

Levine

Director, Product Management

Radvision, an Avaya Company

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Outline


Importance of Video
Quality


Factors affecting QoE


QoE challenge


Video Quality
measurement


Steps in implementing
Video


Evident Monitoring
Solution


3

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

The Importance of the Video Quality


Video services are becoming a popular mode of
communication


The visual sense is extremely important


How do network conditions affect Voice & Video
Quality?


Is your network ready to provide Video services?


4

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

IP Video Surveillance

Video Web Collaboration

Video Conferencing
& Telepresence

IM &Video
Messengers

Social Networking Sites

Video Conferencing
ASPs

Video Streaming

Video Mobile

Video is Everywhere!

5

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Parameters Affecting Quality of Audio ?

6


IP
Network

Receiver

Encoder

Sender

Packetize

Jitter


buffer

Decoder

Unpack

End
-
to
-
end perceived voice quality (MOS)

Loss, Delay,
Jitter,
Ordering,
Duplicate,…..

Distortion
& delay

Delay

Delay

Delay &
Loss

Codec
impairment

Delay

©2013 Avaya Inc. All rights reserved

February 26
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28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
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28, 2013 | Orlando, FL

2
-
20

Packets/frame

1:400

x20

250ms

Why Interactive Video Is So Unique ?

7

Interactive video is sensitive to latency

Video is high capacity

Video is error sensitive

Video traffic is not uniform or constant

+45ms /

-
75ms

Interactive video is sensitive to lip sync

Source: IEEE publications

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Parameters Affecting Quality of Experience

• Packet
loss

Encoding and Compression

8

Frame per seconds

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Audio / Video Quality Scoring


Mean Opinion Score (MOS)


The arithmetic mean of all individual observations,
ranging from
1
(Bad) to
5
(Excellent).



9

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Questions

10


Can my network support full video services ?


What is the expected video / audio quality after
full deployment ?


Do I expect to have interoperability issues ?

Pre
-
deployment

Post
-
deployment


Why do I suffer from pixelated video / freezes ?


How network conditions affect my video ?


Why do I have interoperability issues ?


Why do I have audio issues ?


In
-
Service


What is the status of the calls on my network ?


©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Video Quality Measurement

Methodology

11

©2013 Avaya Inc. All rights reserved

February 26
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28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Media Quality Becomes an Issue



Unmanaged
Networks



Varying Network
Capacities



Varying Devices

12

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Factors Affecting Video Over IP Quality

13

Source:
Packet loss, for instance, is considered by many to be the most annoying
disturbance in interactive video communications. In fact, in a poll question we posted
in a
recent webinar on user experience
, 46% of the participants chose packet loss as
the factor that affects the quality of real
-
time video most.

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Video Quality Measurement Methodologies

“Full
-
Reference”

Based

“No Reference”

Image Based

“No Reference”
Online

Real
-
time

14

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Video Quality Full
-
reference


Full
-
reference allows you to perform a Video Quality
analysis and compare the original video sequence to a
degraded one:


Unique synchronization algorithm developed by
Radvision take on consideration:


Different frame rates, Resizing, profile, codec,
bw
….


Partial picture, Picture in picture, Compression artifacts


Black period, Welcome frames, Logo additions, Title additions


Video Quality algorithm based on frame analysis


15

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Video Quality Real
-
time Measurement


Video Quality Online Standards


ITU G.1070 performs global video quality estimation
based on network and codec parameters that are
unprecedented in scope to guarantee that the tool
maintains the highest correlation with video quality test
results measured by individual perception.


ITU
-
T G.1070 (Objective Video Quality)


ITU
-
R BT.500
-
9. (Subjective)


Human Vision Survey


Extensive & Automated Human

Vision survey based on Full
-
Reference


Radvision Innovative techniques

16

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Human Vision Database


Video Quality Surveys


Unprecedented in scope (x1000 inputs)


Variable contents: video conferences, motion pictures…


Variable artifacts:
blockiness
, packet loss, blurriness…


Worldwide, different viewing preferences






17

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Extensive & Automated

Human Vision Survey


Guarantees high correlation with Human Perception


Database enhanced with state
-
of
-
the
-
art RV Full
-
Reference algorithms


RADVISION’s Human Vision Database was enhanced with
thousands of video samples and their references, designed for
objective analysis.


We applied state
-
of
-
the
-
art RV Full
-
Reference (FR) standard
Video Quality algorithms, and obtained a Full
-
Reference
recommended Video Quality score

18

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL


Innovative VQ Measurement
Algorithms


Additional algorithms for
performing global video
quality estimation, based on:


Packet
-
loss propagation


Quality score based on
compression level


Bit
-
rate and frame
-
rate
fluctuation as an indication of
quality


Quality score based on the
dynamism level of the video


Reason for Video Quality
degradation, as well as
optimization methods


19

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Effect of Packet Loss Propagation


Advanced techniques for packet loss propagation
analysis, based on:


Refresh rate


Intra frame or Intra macro blocks


Packet loss percentage


Packet loss patterns


20

Standard VMOS: 4.4

RV VMOS: 4.4

No Packet loss

Packet loss

Propagation

of


Packet loss

Standard VMOS:
3.4

RV VMOS:
2.4

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Video Quality, Image
-
Based


Performs Video Quality analysis without
reference and without network parameters,
based on image quality:


Blockiness
, blurriness, image loss, …


Video MOS is the aggregate of video


metrics


CPU consumption is very extensive

21

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

How to Detect Image Quality Loss


Video packet loss concealment detection based on
image content


Innovative research presented in 16th European
Signal Processing Conference (EUSIPCO2008)


Different algorithm for I
-
frame and P
-
frame


Over 90% detection precision


22

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Steps in Implementing Video

23

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Steps in Implementing Video


N
etwork
R
eadiness

for voice & video


T
est and
O
ptimize Your
N
etwork

R
eal
T
ime
M
onitoring

QoE

Assess

Optimize

Monitor

24

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

eVident

Video Monitoring

25

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

eVident Monitoring Solution

26

Service Provider

Video Network readiness

Room and network
assessment

Proactive monitoring

and management

Video Service readiness

Improving Video services

Enterprise

Video Network readiness

Pre
-
Call assessment

Room and network
assessment

Proactive monitoring

and management

Improve network visibility

System Integrator

Network readiness


as service

Video Service availability

Proactive monitoring

and management

Real
-
time monitoring

Easier deployment


Video Network Monitoring
-

Market Segment

Complete Video Monitoring Solution

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

eVident Monitoring Solution

27

The Intelligent and Easy Way to Monitor your Video Network

Radvision provides a software
-
based monitoring solution

for use during various stages of the network deployment cycle:

Pre & Post
Deployment Video
Network Readiness

Video Quality
Measurement and
Analysis

Real Time Video
Monitoring

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

eVident Benefits



Reduction in customer turn
-
up costs


Lower network operations
center costs


Monitor and proactively
troubleshooting V2oIP calls


Increased customer
satisfaction


Minimize deployment time


Providing
eVident

based
analysis as a service to
customers.

28

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Radvision’s PreVideo


PreVideo

ensures:


Network readiness for Voice
and Video over IP (HD)


Correct network configuration


Client/Server architecture


Topology emulation, including
interaction with various types
of infrastructures


Problem prevention by
proactive testing


Optimal end
-
user experience
(voice and video quality)

29

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

PreVideo



Distributed Solution

Manager


PreVideo


Agent Paris




PreVideo


Agent Tokyo


30

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

PreVideo
-

Functionality


Support SIP, H323,
CISCO/TIP


Voice & Video Quality MOS


Hundred of calls
simultaneously


XML


Remote Control API


Report PDF, EXL, WORD
Format


USB Agent Key (Plug &
Play)


Pre
-
Call Self Testing


QoS

31

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Analyze and Measure Your Audio & Video


Measure and analyze Audio and HD Video
Quality


Cause analysis


Quality improvement options


32

CAPTURE

NETWORK

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL


Real Time Video Monitoring Solution


Real
-
time QoE Monitoring


Non
-
intrusive (Agent
-
less)


Multiple Vendor Support (Radvision, Polycom,
Lifesize
, Tandberg, Cisco)


P2P and Conference Call


Problem Detection and Solution


CDR with QoE as Metrics (History)


Alerts on Problems (< threshold)


Alarms


System Performance Analysis


Analyzes QoE Trends & Reports


33

Actively Detects

Control your
infrastructure!

Tunes and
Optimizes your
Network

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

RVMON


Architecture

34

Radvision

EPs

can send

additional
information

WEB Interface

Reporting

Alarm

Notification

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Complete Monitoring Solution


Enhances pro
-
active efforts to avoid
service quality problems

before deployment;


Ensure high quality end
-
user
experience


Automate, isolate and analyze


video problems


Increases the efficiency of reactive
measures by providing real
-
time

analysis and diagnostics


Diagnostics and troubleshooting


Reduced customer service

response time


Optimizes intelligent database indexing and
integrated call history End
-
to
-
end
integrated solution



eVident Monitoring
-

Benefit

35

©2013 Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

©
2013
Avaya Inc. All rights reserved

February 26
-
28, 2013 | Orlando, FL

Articles

36

embedded
-
computing

TMCNET


blog.radvision

blog.radvision

©2013 Avaya Inc. All rights reserved

February
26
-
28
,
2013
| Orlando, FL

Thank you!

#
AvayaATF

37