quickguide_videomos_jun2009

8/6/2019 QuickGuide_VideoMOS_Jun2009

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Quick Guide forVideo MOS

MeasurementJun, 2009CHINA(Hong Kong)Couei APAC Ltd.

Unit206, 2/F, No.8 Science West Avenue,Hong Kong Science Park, Shatin,

New Territories, Hong Kong

T +852 2210 7004F +852 2210 7017

www.couei.com


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Voice Quality - Voice MOS

Subjective voice quality measurement

Modeling of human auditory perception

Real voice quality

Slow and higher cost

Objective voice quality measurement

Comparison of original and distorted sound based on

numerical calculation

Non-real voice quality

Quick and lower cost

PoorQuality

BadQuality


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Voice Quality Voice MOS

System or DeviceUnder Test

MOS

ReferenceSignal

MOS

Comparison of input and output sound (Reference type)

PESQ (Perceptual Evaluation of Speech Quality)

MOSAlgorithm

MOSResult


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Video Quality Video MOS Algorithm

MQAS by AMC Tech To measure video MOS by frame. To calculate MOS value based on PSNR. Quality level: 1 (bad) ~ 5 (Excellent) Simple algorithm

Video QT by HFR To measure video MOS by frame.

To calculate MOS value based on not only PSNR but also time relatedelements such as Jerky or Stall. Simple algorithm

PEVQ by OPTicom To measure video MOS by AVI video clip. To calculate Video MOS based on PSNR, Blur, Jerky, Stall.

To require PC resources as it calculates with video files.


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Video Quality - Video Phone Protocol

WCDMA CS Protocol(By CS Video Call)

EVDO Rev.A PS Protocol(By PS Video Call)

Type Desciption

H.223 To transmit actual video and audio data at H.324M protocol.

H.245

Signaling protocol to open VT session at H.324M protocol

To include Terminal Capability Set, Master Slave Determination, OpenLogical Channel, and etc.

RTP (Real Time Protocol) To transmit actual video and audio data as packet.

SIP (Session InitiationProtocol)

Signaling protocol to open VT session


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Video/Audio MOS Quality

To measure video file transmitted through test mobile camera.

For Full Reference Video MOS, to take reference video by extracting the video

at test mobile after encoding to DM and extracting video at DM with decoder.

AMR

Camera

Ear Jack

Encoder Encoder

H.263/MPEG4 AMR

RTP or H.223

RF

Decoder

H.263/MPEG4

RTP or H.223

LCD Ear Jack

(ReceiveVideo)

RF

Decoder

(ReferenceVideo)

Video MOS PC DecoderPC Decoder


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Video Phone Setup Time

MO MT

CS Call Connected

H.324M Signaling Setup(TCS, MSD, OLC)

Video/Audio Packet Transmit

A

B

SetupTime

C

Setup Time The moment when the sender video phone

presses Sending button The moment when the receiver video

phone receives the first video frame.

CS Call Connected(A) The moment when the sender video phone

presses Sending button The moment when the receiver video

phone presses Receive button.

VT Signal Setup Time(B) Call Connected moment ~ H.245:

OpenLogicalChannel moment

VT Final Setup Time(C) VT Signal Setup moment ~ Media Packet

receive moment

Start Call

First imageframe received


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LG Mobile Phone Setting

Mobile DM should be set to USB Diag or USB CDC. If mobile DM is set to Serial, measurement is impossible

due to video packet loss.

Setting

Samsung W350for SKT sales

Diagport

Menu 0 (press firm for a while) 0821 - >SIO- >Port Map->Diag Monitor->USB CDC

Samsung W380for SKT sales

Diagport

Menu 0(press firm for a while) 0821 - >SIO- >Port Map->Diag Monitor->USB CDC

For LG mobiles for SKT sales, to change mobile driver to LGPID Driver before program connection.

How to change mobile driver: Idle window at mobile #872#743349# select LG PID Driver.

For Samsung mobiles for SKT sales, to set Diag Monitor formobile Port Map to USB CDC. (OPTis Port Setting: Port Type= Modem)


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Mobile Alias Setting

WCDMA CS Video Call

Logmask

H324 SIG, H324 Video/Audio SDU; H324 Statistics Send Key

Samsung U700: Send Key 0x5B;32 Receive Key: 0x5B


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Mobile Alias SettingEVDO Rev.A PS Video Call

Logmask: PPP(IP) Data Frame

Send Key- Samsung: (a2 or a0..), LG: (10..)


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Auto Call Setting CS Video Call

Call Setting

1. Transmission/receive and alternation2. Destination mobile number3. CODEC

SKT: H.263 KTF: MPEG4 SKT and KTF: H.263

Video Quality1. Algorithm and measurement type, number of

MOS measurement2. Clip time

Audio Quality1. Audio quality measurement options

Video MOS Event1. Bad Quality, C.B.Q, Continuous B.Q CountSetting

2. Video, Audio Threshold Setting


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Auto Call Setting PS Video Call

Call Setting1. Transmission/receive and alternation2. Destination mobile number3. Algorithm

Video Quality1. MOS measurement type2. Number of MOS measurement

3. Clip time

Audio Quality1. Audio quality measurement options

Video MOS Event1. Bad Quality, C.B.Q, Continuous B.Q

Count Setting2. Video, Audio Threshold Setting


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CS Video Call Event Flow


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Video Phone Message

UplinkDirectTransfer- SETUP

Information transfer capability: (1)


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Video Call Menu Send/Receive Screen


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Video Call Menu Summary Graph


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Video Call Menu CODEC/PEVQ Info


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Video Call Menu - Video Call Statistics


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Video Call Menu Rx Video Integration


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Video Call Menu H.324m Statistics


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Thank You

quickguide_videomos_jun2009

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