Picture Quality Analysis System - alfa
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1. Requires Option BAS 001 SD Broadcast PQR measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD Broadcast ITU R BT 500 NA Typical NA Default PQR Units CRT weightings 002 HD Broadcast PQR measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection HD Broadcast ITU R BT 500 NA Typical NA Default PQR Units CRT weightings 003 CIF and QVGA PQR measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection CIF QVGA LCD 7 scrn heights NA Typical NA Default PQR Units 20 cd m weightings 004 D CINEMA PQR measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection DMD Projector 3 scrn heights NA Typical NA Default PQR Units 1 cd m weightings Requires Option BAS 005 SD Broadcast DMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD Broadcast ITU R BT 500 NA Typical NA Default DMOS Units Re CRT weightings BT 500 Training 006 HD Broadcast DMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection HD Broadcast ITU R BT 500 NA Typical NA Default DMOS Units Re CRT weightings BT 500 Training www tektronix2. vcap created by PQA600A SDI video capture vcap10 10 bit created by PQA600A video capture Supported file formats for measurement All formats support 8 bit unless otherwise stated a yuv UYVY YUY2 YUV4 4 4 YUV4 2 0_planar V210 10 bit UYVY 3 components in 32 bits rgb BGR24 GBR24 avi uncompressed BGR32 discard alpha channel BGR24 UYVY YUY2 v210 ARIB ITE format 4 2 0 planar with 3 separate files yyy vcap created by PQA600A SDI video capture vcap10 10 bit created by PQA600A video capture www tektronix com 11 Datasheet The following compressed files are internally converted to an uncompressed file before measurement execution The format support listed here is available in software version 4 0 and later Format ES ADF MP4 3GPP Quicktime MP2 PES MP2PS MP2 TS MXF GXF AVI LXF H263 X X X X X MP2 X X X X X X X X X MP4 X X X X X X H264 AVC X X X X X X X X X DV X X X X X X VC 1 X X X ProRes X Quicktime X X X JPEG2000 X X VC3 X X X X X DNxHD Raw X X X Prelnstalled video sequences The following preinstalled video sequences are available Sequence Resolution Formats Clips Vclips 1920x1088 YUV4 2 0 planar V031202 Eigth Ave V031255 TimeSquare V031251 Stripy jogger 1920x1080 UYVY V031251 Stripy jogger 1280x720 UYVY YUV4 2 0 planar
3. Conducted in 2009 with 1080i29 Video Contents and H 264 CODEC Refer to application note 28W 24876 0 pdf Requires Option BAS 036 HD PQR ITU BT500 with Interlaced CRT measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection Custom HD CRT 3 scrn heights NA Custom NA NA PQR units 037 HD DMOS ITU BT500 with Interlaced CRT measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection Custom HD CRT 3 scrn heights NA Custom NA NA DMOS Units Re BT 900 Training 038 HD ADMOS ITU BT500 with Interlaced CRT measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection Custom HD CRT 3 scrn heights NA Custom NA Typical DMOS Units Re BT 900 Training 1 Requires Options BAS and ADV 18 www tektronix com Picture Quality Analysis Sysem PQA600A Specifications All specifications apply to all models unless noted otherwise Nodes available with Option ADV Display model View model PSNR Perceptual difference Attention model Artifact detect Summary node Operating system CPU Hard disk drive CD DVD drive Input output ports Power Keyboard port Mouse port USB ports LAN port Graphics port SDI HDMI IO port Display technology CRT LC
4. Surround Eccentricity Orientation Adaptation effects M A AU LII a mmm a A ssi D rd e LL h i NENNEN dl A HHHH HHH F 0 1 100 A Modulation sensitivity vs temporal frequency Picture Quality Analysis Sysem PQA600A HL eee ai anam IN B Modulation sensitivity vs spatial frequency This model has been calibrated over the appropriate combinations of ranges for these parameters with reference stimulus response data from vision science research As a result of this calibration the model provides a highly accurate prediction The graphs above are examples of scientific data regarding human vision characteristics used to calibrate the human vision system model in the PQA Graph A shows modulation sensitivity vs temporal frequency and graph B shows modulation sensitivity vs spatial frequency The use of over 1400 calibration points supports high accuracy measurement results C Reference picture www tektronix com 3 Datasheet D Perceptual contrast map Picture C is a single frame from the reference sequence of a moving sequence and picture D is the perceptual contrast map calculated by the PQA The perceptual contrast map shows how the viewer perceives the reference sequence The blurring on the background is caused by temporal masking due to camera panning and the black area around the jogger shows the masking effect due to the high contrast between the b
5. 20 www tektronix com Picture Quality Analysis Sysem PQA600A 119 7054 xx USB mouse Software key dongle Instrument options Product options BAS Base measurement package ADV Advanced measurement package script operation measurement configurability weighting measurements IP IP generation capture LUD Add permissions to existing hardware key Note Need to purchase Option BAS for basic picture quality measurement Option ADV requires Option BAS Power plug options Opt A0 North America power plug 115 V 60 Hz Opt A1 Universal Euro power plug 220 V 50 Hz Opt A2 United Kingdom power plug 240 V 50 Hz Opt A3 Australia power plug 240 V 50 Hz Opt A4 North America power plug 240 V 50 Hz Opt A5 Switzerland power plug 220 V 50 Hz Opt A6 Japan power plug 100 V 110 120 V 60 Hz Opt A10 China power plug 50 Hz Opt A11 India power plug 50 Hz Opt A12 Brazil power plug 60 Hz Opt A99 No power cord Service options Opt C3 Calibration Service 3 Years Opt CA1 Single Calibration or Functional Verification Opt R3 Repair Service 3 Years including warranty IF Upgrade installation service www tektronix com 21 Datasheet Post sale upgrade Option Description PQA6AUP Field Upgrade Kit for PQA600A Choose from the following options BAS Base measurement package ADV Advanced measurement package Script operation measurement configurability weighting measurement IP ge
6. 97 cr ndi refLeftcrop 1 000000 a aves 1 000000 refTopcrop 1 000000 refBottomcrop 1 000000 impaired C video AEU_test fal1_test_420_8bit_1920x1088 yuv impwidth 1920 impHeight 1088 impRate 29 97 impInter lace endRef Fr ames 80 star tImpFra 1 endimpFr ame B0 dualended tr impHor i zScale 100 000000 impHor izShift 0 000000 impvertScale 100 000000 lt r rtshift 0 000000 impLeftcrop 1 000000 outputROIStartrrame 1 outputROIEndFrame 80 outputROILeft 0 outputROIR ghte 0 outpi ICROTTOQS Q 0 outputROIBOLttome O refinputROILeft O refinputROIRighte O refinputROITop 0 refinputROIBottome 0 impInputROILefte o NaEnpuc Roda ght 0 autoRefHorizCrop true autoRefvertcrop true autoImpHor at wr autoImpvertCrop true autoImpHorizshift true auto autoTemporalAlign true minSearchDelay 1 maxSearchDelay lt blocki gt Script sample Show Import Export Setting Import From script F video MeasureSetting xml Export to script 1 Five Coe Jo F video MeasureSetting xml Enter the name of the File to be saved IF the file does not exist a new file will be created Import Export script in configure measure dialog om Home ig A P l Open Quick Print Copy Find Go Page Print Switch int Preview To Setup Area Windows Office Document Edit Page Setup Window Leu ma cm m m e a hn mim a gt PQA Versi 3 Tektroni 006 HD Broadcast D
7. The Static nature of test signals does not provide true characterization of picture quality Human viewer testing has been traditionally conducted as described in ITU R Rec BT 500 11 A test scene with natural content and motion is displayed in a tightly controlled environment with human viewers expressing their opinion of picture quality to create a Differential Mean Opinion Score or DMOS Extensive testing using this method can be refined to yield a consistent subjective rating However this method of evaluating the capabilities of a compressed video system can be inefficient taking several weeks to months to perform the experiments This test methodology can be extremely expensive to complete and often the results are not repeatable Thus subjective DMOS testing with human viewers is impractical for the CODEC design phase and inefficient for ongoing operational quality evaluation The PQA provides a fast practical repeatable and objective measurement alternative to subjective DMOS evaluation of picture quality System evaluation The PQA can be used for installation verification and troubleshooting of each block of the video system because it is video technology agnostic any visible differences between video input and output from processing components in the system chain can be quantified and assessed for video quality degradation Not only can CODEC technologies be assessed in a system but any process that has potential for vis
8. V031002 Eigth Ave V031055 TimeSquare V031051 Stripy jogger with 3 10 26 Mb s 864x486 YUV4 2 0 planar Converted V031051_Stripy_jogger with 2 4 7 Mb s 320x180 YUV4 2 0 planar Converted V031051_Stripy_jogger with 1000 1780 2850 Kb s PQA300 without Trigger 120x486 UYVY Ferris Flower Tennis Cheer with 2 Mb s 25 fps 120x576 UYVY Auto BBC Ski Soccer PQA300 with Trigger 720x486 UYVY Mobile with 3 6 9 Mb s 720x576 UYVY Mobile with 3 6 9 Mb s Performance you can count on Depend on Tektronix to provide you with performance you can count on In addition to industry leading service and support this product comes backed by a one year warranty as standard 12 www tektronix com Preconfigured measurements set Some measurements are available only with Option ADV View video with no measurement class Measurement name Requires Option BAS 000 View Video No applicaable configuration nodes Subjective prediction Full reference Noticeable differences SD display and viewing measurement class HD display and viewing measurement class CIF display and viewing measurement class D CINEMA Projector and viewing measurement class Subjective rating predictions SD display and viewing measurement class HD display and viewing measurement class Picture Quality Analysis Sysem PQA600A
9. com 13 Datasheet CIF display and viewing measurement class D CINEMA Projector and viewing measurement class Attention biased subjective rating predictions SD display and viewing measurement class HD display and viewing measurement class CIF display and viewing measurement class SD sports measurement class HD sports measurement class SD talking head measurement class 14 www tektronix com 007 CIF and QVGA DMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection CIF QVGA LCD 7 scrn heights NA Typical NA Default DMOS Units Re 20 cd m weightings BT 500 Training 008 D CINEMA DMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection DMD Projector 3scrn heights NA Typical NA Default DMOS Units Re 1 cd m weightings BT 500 Training Requires Options BAS and ADV 009 SD broadcast ADMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD Broadcast ITU R BT 500 NA Typical NA Default DMOS Units Re CRT weightings BT 500 Training 010 HD Broadcast ADMOS measurement Display model Vie
10. 7 30 1080psF 23 98 24 25 29 97 30 1080p 23 98 24 25 29 97 30 es Sg se gee pap td E a a Note Ifa pe ee ne ee ONE TEN 1080p Level A B 50 59 97 60 Network Card Broadcom NetXtreme Gigabit Ethernet Driver v IP Address 192 158 96 169 Ueedreced waficon bP port 15395 S affe seamed dreciy to your compute Supported file formats for IP interface Inspect all traffic on Network Card Multicast Options The IP interface option can generate and capture compressed files using IGMP Mode On i tosepaein cinema TS support over UDP in compliance with ISO IEC 13818 1 Multicast Address 239 255 255 250 pans afl lean nie ital mede 134 64 233 17 When the IGMPv2is in use the SSM feature is not cs o CE E EE Supported file formats for up down X es conversion Ll The following formats are supported for up down conversion i Input format Output format Supported file formats for SD HD 3G SDI TETIS 720p 59 94 10801 29 97 HDMI compliant with HDCP interface PUE 720p 50 1080 25 The SD HD SDI video option can generate SDI video from files in the 720p 50 625i 25 1080i 25 following formats 8 bit unless otherwise stated 720p 59 94 525i 29 97 1080 29 97 m yuv UYVY YUY2 720p 60 1080i 30 m V210 10 bit UYVY 3 components in 32 bits 80psf 23 98 525i 29 97 gb BGR24 1080i 25 625i 25 720p 50 1080i 29 97 525i 29 97 720p 59 94 avi uncompressed BGR32 discard alpha channel BGR24 UYVY TENES C YUY2 v210 P
11. D DMD each with preset and user configurable parameters Interlace Progressive gamma response time etc reference display and test display can be set independently Viewing distance ambient luminance for reference and test independently image cropping and registration automatic or manual control of image cropping and test image contrast ac gain brightness dc offset horizontal and vertical scale and shift No configurable parameters The viewer characteristics acuity sensitivity to changes in average brightness response speed to the moving object sensitivity to photosensitive epilepsy triggers etc Overall attention weighting for measures temporal Motion spatial Center people Skin foreground contrast color shape size distractions Differences Added edges Blurring removed edges Ringing Mosquito noise rotated edges Edge blockiness and DC blockiness Removed detail within a block Measurement Units Subjective Predicted DMOS PQR or Perceptual Contrast Objective Mean Abs LSB dB Map type Signed on gray or unsigned on black Worst case Training Sequence for ITU R BT 500 Training Default or User application Tuned Determined by Worst Case Video Perceptual Contrast Error Log Threshold Save Mode Computer system and peripherals Windows 7 professional 64 bit Intel Xeon processor E5 2630 2 3 GHz 0 5TB OS 2 5TB Video 8X DVD RW drive 100 240 V 50 60 Hz 115 V 230 V 6 A 3 A PS 2 com
12. MOS Perceptual Difference Map amp DMOS Prediction Simulated BT 500 interlaced CRT displays amp typical viewers human vision system at a viewing distance Measure N LuminanceOnly Summary Min 0 Max Units Reference nits Impaired Ir nits Result Maj perceptual contrast Command Parameters Measure T Dual Only 10 Reference C Video WEU_test Driving ref 420 8b tt 1920x1088 yuv 11 Rate 29 97 Structure progressiw Format YCbYCr4 2 Width 12 Impaired C AVideowAEU testiDrang test 420 Bbit_ 1920x1088 yuv 13 Rate 29 97 Structure progressi Format YCbYCr4 Width 14 Reference Start 1 End 100 15 Impaired F Start 1 End 100 16 17 Decoder Reference Status Enabled Decoder T YUV Frame Cot 100 Multiplier 1 Input SpatiLeft px 0 Right px 0 Top px 0 Bottom p c Cc Uu WwWN 1920 Height 1920 Height Impaired Status Enabled Decoder T YUV Frame Cot 100 Multiplier 1 Input SpatiLeft px 0 Right px 0 Top px 0 Bottom p 92 93 Frame Min Max 94 Mean Abs StdDev Minkowski DMOS _PQR PSNR 95 10 10 1 0 12953 0202653 0003494 0004873 0 00597 0021996 96 820 202 061641 0 971552 0 006144 0010455 0 01574 0 152398 97 830 303 207411 4739135 0 009329 0 025023 0047669 1355691 98 40 404 217319 4332368 0026574 0 065872 0097053 513395 99 850 505 1 89604 2 648358 0058101 0 11367 0 153323 12 53955 100 6 0 606 165166 206427 0070152 0 124533 0 164091 14 36769 M 006 HD Broadcast DMO
13. S 4 Ready Result file sample Picture Quality Analysis Sysem PQA600A SD HD 3G SDI HDMI compliant interface and IP interface An SD HD SDI interface and IP interface enable both generation and capture of SDI video and IP video The HDMI compliant with HDCP support allows the user to directly capture the HDCP encrypted contents from the consumer instruments such as Blu ray player and Set Top Box without hassle This is beneficial for comparing the performance in multiple units models or monitoring the picture quality of end to end broadcast chain including the STB output at home Test Input HOM with HDCP PGAGOQDA Reference File Transfer Test Data Archive HDMI compliant with HDCP support comparing Blu ray disk players EE Up converter Down PQ conversion i Measurement Reference 525i Test 1080i PQA600A Simultaneous generation capture measuring the picture quality of Up converter device There are three modes of simultaneous generation capture operation that can be performed on all video formats except 1080p 50 59 60 formats generation and capture 2 channel capture and 2 channel generation Simultaneous generation and capture Simultaneous generation and capture lets the user playout the reference video clips directly from the PQA into the device under test The test output from the device can then be simultaneously captured by the PQA The real time up down converter could b
14. Tektronix Picture Quality Analysis System PQA6000A Datasheet The PQA600A is the latest generation Picture Quality Analyzer built on the Emmy Award winning Tektronix PQA200 300 Key performance specifications SD HD 3G SDI HDMI compliant with HDCP interface 2 channel Capture and 2 channel Generation with Swap channel Side by Side Wipe display on all video formats except 1080p 50 59 60 formats Real time Up Down conversion at generation capture with SDI HDMI interface for testing the instrument with Up down conversion process Key features Fast Accurate Repeatable and Objective Picture Quality Measurement Option BAS Predicts DMOS Differential Mean Opinion Score based on Human Vision System Model Option BAS IP interface supporting IGMP for Simultaneous Generation and Capture IP Interface with simultaneous 2 channel generation capture with IGMP support for multicast streams Option IP Picture Quality Measurements can be made on a Variety of HD Video Formats 1080p 1080i 720p and SD Video Formats 525i or 625i Option BAS User configurable Viewing Condition and Display Models for Reference and Comparison Option ADV Attention Artifact Weighted Measurement Option ADV Region Of Interest ROI on Measurement Execution and Review Option BAS Automatic Temporal and Spatial Alignment Option BAS Embedded Reference Decoder Option BAS Easy Regression Testing and Automation using XML Sc
15. ackground and the jogger The PQA creates the perceptual map for both reference and test sequences then creates a perceptual difference map for use in making perceptually based full reference picture quality measurements Comparison of predicted DMOS with PSNR In the examples Reference E is a scene from one of the VClips library files The image Test F has been passed through a compression system which has degraded the resultant image In this case the background of the jogger in Test F is blurred compared to the Reference image E A PSNR measurement is made on the PQA of the difference between the Reference and Test clip and the highlighted white areas of PSNR Map G shows the areas of greatest difference between the original and degraded image Another measurement is then made by the PQA this time using the Predicted DMOS algorithm and the resultant Perceptual Difference Map for DMOS H image is shown Whiter regions in this Perceptual Contrast Difference map indicate greater perceptual contrast differences between the reference and test images In creating the Perceptual Contrast Difference map the PQA uses a human vision system model to determine the differences a viewer would perceive when watching the video G PSNR map H Perceptual difference map for DMOS The Predicted DMOS measurement uses the Perceptual Contrast Difference Map H to measure picture quality This DMOS measurement would correctly recognize the viewe
16. by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specification and A price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc All other trade names referenced are the service marks trademarks or registered trademarks of their respective companies VEO 19 Dec 2013 25W 28639 5 www tektronix com Tektronix S
17. detection QCIF and CIF 7 scrn heights NA Expert NA NA DMOS Units Re QVGA LCD 20 cd m BT 500 Training Attention Requires Option BAS Attention measurement class 019 Stand alone Attention Model measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA NA NA NA NA Default Map units weightings Probability of focus of attention www tektronix com 15 Datasheet Objective measurements Full reference General difference PSNR measurement class Artifact measurement Removed edges measurement class Added edges measurement class Rotated edges measurement class of original deviation from block DC measurement class Artifact classified filtered PSNR Removed edges measurement class Added edges measurement class 16 www tektronix com Requires Option BAS 020 PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA NA NA dB units spatial Requires Options BAS and ADV 021 Removed Edges Percent measurement Display model View model PSNR Perceptual Artifact Atte
18. e inserted in the video signal path at generation or capture operation to evaluate an instrument with up down conversion process www tektronix com 9 Datasheet Transmission Master Air Cable Satellite TEM Contents Set Top Box HDMI with HDCP Y wiz H mE Reference Input SD HD 3G SDI Test Input HDMI with HDCP PQA600A Simultaneous 2 channel capture evaluating the performance of a set top box Simultaneous 2 channel capture Simultaneous 2 channel capture lets the user capture two live signals to use as reference and test videos in evaluating the device under test in operation To accommodate equipment processing delay that may be present in the system the user can use the Delay Start function when capturing video Using Delayed Start minimizes the number of unused overhead frames in the test file and enables faster execution of the auto temporal alignment in the measurement Simultaneous 2 channel generation Simultaneous 2 channel generation capability available only in SDI HDMI interface selection supports three types of subjective testing with one display Swap channel capability will exchange reference and test video sources in a frame to help the user to figure out the difference without moving his her eye s focus point vadeo preview deo preview NC gt bop GMM RUM Sist Goreisie Mm 0 00 secondi fo 29 7 amnis 458 secondi From 1 7 tramedx O00 seconds lc 090 7 a
19. el View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA All artifacts NA dB units spatial selected 032 SD from HD Broadcast Artifact weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA All artifacts NA dB units spatial selected 033 QCIF from CIF and QVGA Artifact weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA All artifacts NA dB units spatial selected www tektronix com 17 Datasheet Attention weighted objective measurements General differences PSNR measurement class Requires Options BAS and ADV 034 Attention Weighted PSNR dB measurement Objective measurements No reference Artifact Artifact measurement class Subjective prediction calibrated by subjective rating Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA NA Selected NA NA Default dB units weightings Requires Options BAS and ADV 035 No Reference DC Blockiness Percent measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA NA NA NA No reference DC NA DC blockiness block
20. ible differences can also be assessed For example digital transmission errors format conversion i e 1080i to 480p in set top box conversions analog transmission degradation data errors slow display response times frame rate reduction for mobile transmission and videophone teleconferencing and more can all be evaluated User Interface of PQA Showing reference test sequences with difference map and statistical graph 2 www tektronix com How it works The PQA takes two video files as inputs a reference video sequence and a compressed impaired or processed version of the reference First the PQA performs a spatial and temporal alignment between the two sequences without the need for a calibration stripe embedded within the video sequence Then the PQA analyzes the quality of the test video using measurements based on the human vision system and attention models and then outputs quality measurements that are highly correlated with subjective assessments The results include overall quality summary metrics frame by frame measurement metrics and an impairment map for each frame The PQA also provides traditional picture quality measures such as PSNR Peak Signal to Noise Ratio as an industry benchmark impairment diagnosis tool for measuring typical video impairments and detecting artifacts Each reference video sequence and test clip can have different resolutions and frame rates This capability supports a variety of rep
21. iewing conditions Generally best prediction accuracy but slower Single Ended amp Dual Ended Reference Browse Disk Browse Memory Browse Memory Show Import Export Setting Import from script C Wiews Savannah Branch_otiwari goldeneye sr Enter the name of the file to be saved If the file does not exist a new file will be created Apply Help Process Workflow Cot gt org Perceptual p Semmary gt Model x odel Difference Node p ERU a ir EPIO Se Name Copy 2 of 006 HD Broadcast DMOS Description Perceptual Difference Map amp DMOS Prediction Simulated BT 500 interlaced CRT displays amp typical viewer s humar Edit measure dialog Picture Quality Analysis Sysem PQA600A The PQA supports these measurements through preset and user defined Ed combinations of display type viewing conditions human vision response Y demographic focus of attention and artifact detection in addition to the default ITU BT 500 conditions The ability to configure measurement conditions helps CODEC designers evaluate design trade offs as they optimize for different applications and helps any user investigate how different viewing conditions affect picture quality measurement results A Time Shift user defined measurement is created by modifying a preconfigured a measurement or creating a new one then saving and recalling the user defined measurement from the Configure Measure dialog menu Easy to
22. ives a score for just the selected spatial area It s an effective way to investigate a specific spatial region in the difference map for certain impairments Output Temporal ROI is set by marker operation on the graph and allows users to get a result for just a particular scene when the video stream has multiple scenes It also allows users to provide a result without any influence from initial transients in the human vision model Each parameter can be embedded in a measurement for the recursive operation Automated testing with XML scripting In the CODEC debugging optimizing process the designer may want to repeat several measurement routines as CODEC parameters are revised Automated regression testing using XML scripting can ease the restrictions of manual operation by allowing the user to write a series of measurement sequences within an XML script The script file can be exported from or imported to the measurement configuration menu to create and manage the script files easily Measurement results of the script operation can be viewed by using either the PQA user interface or any spreadsheet application that can read the created csv file format as a summary Multiple scripts can be executed simultaneously for faster measurement results File Edit Format View Help lt blockl gt MEASURE name 020 PSNR dB startRefFramee 1 reference C Video AEU_test Stall ref 420 8bit 1920x1088 yuv refwidth 1920 FefHeight 1088 refRate 29
23. n an image block or DC blockiness Spatial Gradient Artifacts Enable Weighting E 100 ZLostEdges Blurring E 100 Added Edges Ringing E 100 amp Rotated Edges Blocking _ Produce complimentary data 0R DC Blockiness Artifacts Enable Weighting E 100 DC Blockiness Overall Artifact Weighting 0 o U Artifact detection settings They work as weighting parameters for subjective and objective measurements with any combination The results of these different measurement combinations can help to improve picture quality through the system For example artifact detection can help answer questions such as Will the DMOS be improved with more de blocking filtering or Should less prefiltering be used If edge blocking weighted DMOS is much greater than blurring weighted DMOS the edge blocking is the dominant artifact and perhaps more de blocking filtering should be considered In some applications it may be known that added edges such as ringing and mosquito noise are more objectionable than the other artifacts These weightings can be customized by the user and configured for the application to reflect this viewer preference thus improving DMOS prediction www tektronix com 5 Datasheet Likewise PSNR can be measured with these artifact weightings to determine how much of the error contributing to the PSNR measurement comes from each artifact The Attention Model and Artifact Detecti
24. n select two measurement results on a graph with auto time shifting that absorbs the timing difference at the content capture tom compare two measurement results intuitively Summary measures of standard parameters and perceptual summation metrics for each frame and overall video sequence are provided In Overlay display the user can control the mixing ratio with the fader bar enabling co location of difference map reference and impairments in test videos Overlay display reference and map www tektronix com 7 Datasheet Error logging and alarms are available to help users efficiently track down the cause of video quality problems All results data and graphs can be recalled to the display for examination Automatic temporal spatial alignment The PQA supports automatic temporal and spatial alignment as well as manual alignment Auto spatial alignment execution with spatial region of interest selected The automatic spatial alignment function can measure the cropping scale and shift in each dimension even across different resolutions and aspect ratios If extra blanking is present within the standard active region it is measured as cropping when the automatic spatial alignment measurement is enabled The spatial alignment function can be used when the reference video and test video both have progressive content In the case where the reference video and test video has content with different scanning interlace vers
25. neration capture IP IP generation capture PQA6UP Field upgrade kit for PQA600 VID SDI HDMI card Product selection Feature PQASW PQA600A PSNR PQR DMOS preconfigured measurements Yes Option BAS Multi resolution Frame rate support Yes Option BAS Multi results view options Yes Option BAS Embedded reference decoder Yes Option BAS Automatic temporal and spatial alignment Yes Option BAS IP Generation Capture Option IP Option IP User configurable measurements Option ADV Option ADV Attention Artifact weighted measurements Option ADV Option ADV XML scripting with Export Import files Option ADV Option ADV SD HD 3G SDI generation and capture No Yes HDMI without HDCP generation and capture No Yes HDMI with HDCP generation amp capture No Option BAS Video format conversion No Yes Side by side wipe display at generation No Yes Additional information Please contact your local Service Manager for information regarding our products and services or contact us at www tektronix com serviceandsupportcontactus HDMI Trademark notice The terms HDMI and HDMI High Definition Multimedia Interface and the HDMI Logo are trademarks or registered trademarks of HDMI Licensing LLC in the United States and other countries Tektronix is registered to ISO 9001 and ISO 14001 by SRI Quality System Registrar 22 www tektronix com Picture Quality Analysis Sysem PQA600A www tektro
26. nix com 23 Datasheet ASEAN Australasia 65 6356 3900 Austria 00800 2255 4835 Balkans Israel South Africa and other ISE Countries 41 52 675 3777 Belgium 00800 2255 4835 Brazil 55 11 3759 7627 Canada 1 800 833 9200 Central East Europe and the Baltics 41 52 675 3777 Central Europe amp Greece 41 52 675 3777 Denmark 45 80 88 1401 Finland 41 52 675 3777 France 00800 2255 4835 Germany 00800 2255 4835 Hong Kong 400 820 5835 India 000 800 650 1835 Italy 00800 2255 4835 Japan 81 3 6714 3010 Luxembourg 41 52 675 3777 Mexico Central South America amp Caribbean 52 55 56 04 50 90 Middle East Asia and North Africa 41 52 675 3777 The Netherlands 00800 2255 4835 Norway 800 16098 People s Republic of China 400 820 5835 Poland 41 52 675 3777 Portugal 80 08 12370 Republic of Korea 001 800 8255 2835 Russia amp CIS 7 495 6647564 South Africa 41 52 675 3777 Spain 00800 2255 4835 Sweden 00800 2255 4835 Switzerland 00800 2255 4835 Taiwan 886 2 2722 9622 United Kingdom amp Ireland 00800 2255 4835 USA 1 800 833 9200 European toll free number If not accessible call 41 52 675 3777 Updated 10 April 2013 For Further Information Tektronix maintains a comprehensive constantly expanding collection of application notes technical briefs and other resources to help engineers working on the cutting edge of technology Please visit www tektronix com Copyright Tektronix Inc All rights reserved Tektronix products are covered
27. nnis 4 98 secondi Gerate From Generate From E Wideo Dig Oros fon 720050 CgiLevets SINC ALTER SVT dec MS10b4 1291 720 SOU0lp Nointecsce CeYCAT0 210 EWideo Donio fn 720090 Cales SINC FILTER SYT dec MS10bi 12900720 SOO0tp Nointerece CeYCA 10 v210 Kee fme Coni gure Mesure Chee hep Simultaneous 2 channel generation swapping output channels 1 and 2 Side by side display arranges the video output from the regions in the reference and test video lining up in a row The Wipe display takes the left region of reference video and the right region of the test video and merges them into a single video output seamlessly Reference Side by Side Video Output Simultaneous 2 channel generation side by side display Reference Video Output Simultaneous 2 channel generation wipe display 10 www tektronix com Picture Quality Analysis Sysem PQA600A IGMP support Frame geometry Format Frame format In any modes the user can select the Cross Interface configuration such as 720 x 486 525i 29 97 generating from SDI HDMI and capturing from IP or vice versa IGMP 720 x 576 625i 25 support in IP capture will make stream selection simple at multicast streaming The compressed video file captured through IP will be converted ee Tp A 99A ON to an uncompressed file by an internal embedded decoder 1920 x 1080 1080i 25 29 9
28. ntion model Summary node difference detection NA Auto align NA NA Blurring NA spatial 022 Added Edges Percent measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align NA NA Ringing NA spatial Mosquito Noise 023 Rotated Edges Percent measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align NA NA Edge Blockiness NA Spatial 024 DC Blocking Percent measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align NA NA DC Blockiness NA Spatial Requires Options BAS and ADV 025 Removed Edges Weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA Blurring NA dB units Spatial 026 Added Edges Weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA Ringing NA dB units spatial Mosquito Noise Rotated edges measurement class of original deviation from block DC measurement class Artifact annoyance weighted filtered PSNR PSNR w default artifact annoyance weights measurement class Repurposing Format conversion Cinema to SD DVD measurement class Format con
29. on can also be used in conjunction with any combination of picture quality measurements This allows for example evaluation of how much of a particular noticeable artifact will be seen where a viewer is most likely to look Comprehensive picture quality analysis The PQA provides Full Reference FR picture quality measurements that compare the luminance signal of reference and test videos It also offers some No Reference NR measurements on the luminance signal of the test video only Reduced Reference RR measurements can be made manually from differences in No Reference measurements The suite of measurements includes Critical viewing Human vision system model based Full reference picture quality Casual viewing Attention weighted Full reference or No reference picture quality Peak Signal to Noise ratio PSNR Full reference Focus of attention Applied to both Full reference and No reference measurements Artifact detection Full reference except for DC blockiness DC blockiness Full reference and No reference 6 www tektronix com Measures O00 View Video 001 SD Broadcast POR 002 HD Broadcast POR 003 CIF and QVGA POR 004 D CINEMA PGR 005 SD Broadcast DMOS 006 HD Broadcast DMOS 007 CIF and QVGA DMOS 008 D CIMEMA DMOS 009 SD Broadcast ADMOS Measure Description Attention Weighted Difference Mean Opinion Score ADMOS Prediction Simulated displays amp human vision system at a BT 500 v
30. patible PS 2 compatible 8x USB 2 0 2x USB 3 0 Two RJ 45 connectors 10 100 1000BASE T Dual link DVI I HDCP Display port HDCP up to 2560x1600 60 Hz www tektronix com 19 Datasheet Physical characteristics Dimensions Height 433 mm 17 0 in Width 215 mm 8 5 in Depth 550 mm 21 7 in Weight Net 18 1 kg 39 8 Ib Ordering information Models PQA600A Picture Quality Analysis System PC monitor requirement The PQA600A does not include a PC monitor an external monitor meeting the following requirements is to be provided by the user HDCP compliant dual link DVI port Display resolution 2560x1600 optimum preferred 1920x1080 minimum Included accessories One year warranty plus the following PQA600A Picture Quality Analysis System documentation 071 3208 xx User manual 071 3157 xx Measurement technical reference 77 0787 xx Release notes 077 0788 xx PQA600A declassification and security instructions 077 0789 xx Specifications technical reference 077 0812 xx User technical reference Other included accessories 001 1180 xx Statement of compliance 020 3053 xx Video sequences recovery media 020 3130 xx Application recovery disk 174 6308 xx HDMI cable Type A to Type C 2 0 m 013 0347 xx DVI to VGA adapter 174 6345 xx Display port to DVI D adapter cable 119 7275 xx USB keyboard 2 These PDF only documents are available on the Tektronix Web site www tektronix com manuals
31. ripting with Export Import File from GUI Option ADV Multiple Results View Options Option BAS Preinstalled Sample Reference and Test Sequences Applications CODEC design optimization and verification Conformance testing transmission equipment and system evaluation Digital video mastering Video compression services Digital consumer product development and manufacturing Picture quality analysis software The PQA600A PQA is the latest generation Picture Quality Analyzer built on the Emmy Award winning Tektronix PQA200 300 Based on the concepts of the human vision system the PQA provides a suite of repeatable objective quality measurements that closely correspond with subjective human visual assessment These measurements provide valuable information to engineers working to optimize video compression and recovery and maintaining a level of common carrier and distribution transmission service to clients and viewers www tektronix com 1 Datasheet Compressed video requires new test methods The true measure of any television system is viewer satisfaction While the quality of analog and full bandwidth digital video can be characterized indirectly by measuring the distortions of static test signals compressed television systems pose a far more difficult challenge Picture quality in a compressed system can change dynamically based on a combination of data rate picture complexity and the encoding algorithm employed
32. rs perceive the jogger as less degraded than the trees in the background The PSNR measurement uses the difference map C and would incorrectly include differences that viewers do not see E Reference 4 www tektronix com Attention model The PQA600A Opt BAS and Opt ADV or PQASW Opt ADV also incorporate an Attention Model that predicts focus of attention This model considers Motion of objects Skin coloration to identify people Location Contrast Shape Size Viewer distraction due to noticeable quality artifacts Attention map example the jogger is highlighted These attention parameters can be customized to give greater or less importance to each characteristic This allows each measurement using an attention model to be user configurable The model is especially useful to evaluate the video process tuned to the specific application For example if the content is sports programming the viewer is expected to have higher attention in limited regional areas of the scene Highlighted areas within the attention image map will show the areas of the image drawing the eye s attention Picture Quality Analysis Sysem PQA600A Artifact detection Artifact detection reports a variety of different changes to the edges of the image Loss of edges or blurring Addition of edges or Ringing Mosquito noise Rotation of edges to vertical and horizontal or edge blockiness Loss of edges withi
33. t conversion cinema to 015 SD DVD from D Cinema DMOS measurement SD DVD measurement class Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection DMD projector 7 scrn heights NA Expert NA NA DMOS Units Re and SD CRT 20 cd m and BT 500 Training ITU R BT 500 Format conversion SD to CIF 016 CIF from SD Broadcast DMOS measurement measurement class ee Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection LCD and SD 7 scrn heights NA Expert NA NA DMOS Units Re Broadcast CRT 20 cd m and BT 500 Training ITU R BT 500 Format conversion HD to SD 017 SD from HD Broadcast DMOS measurement measurement class Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD and HD ITU R BT 500 NA Expert NA NA DMOS Units Re Broadcast CRT BT 500 Training Format conversion SD to HD 017 A SD from HD Broadcast DMOS measurement measurement class Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD and HD ITU R BT 500 NA Expert NA NA DMOS Units Re Progressive CRT BT 500 Training Format conversion CIF to 018 QCIF from CIF and QVGA DMOS measurement QCIF measurement class Display model View model PSNR Perceptual Artifact Attention model Summary node difference
34. urposing applications such as format conversion DVD authoring IP broadcasting and semiconductor design The PQA can also support measurement clips with long sequence duration allowing a video clip to be quantified for picture quality through various conversion processes Prediction of human vision perception PQA measurements are developed from the human vision system model and additional algorithms have been added to improve upon the model used in the PQA200 300 This new extended technology allows legacy PQR measurements for SD while enabling predictions of subjective quality rating of video for a variety of video formats HD SD CIF etc It takes into consideration different display types used to view the video for example interlaced or progressive and CRT or LCD and different viewing conditions for example room lighting and viewing distance Ref Human Cognitive Task Input E Vision based Format Display View Perceptual Attention Summary Conversion Model Model PW Model P Model Measures Test i Results Input o Format Display View Conversion Model P Model Picture quality analysis system A model of the human vision system has been developed to predict the response to light stimulus with respect to the following parameters Contrast including supra threshold Mean luminance Spatial frequency Temporal frequency Angular extent Temporal extent
35. us progressive or vice versa the full reference measurement may not be valid In the case where the reference video and test video both have interlaced content the measurement is valid when spatial alignment is not needed to be set differently from the default scale and shift 8 www tektronix com Region of interest There are two types of spatial temporal Region of Interest ROI Input and Output Input ROIs are used to eliminate spatial or temporal regions from the measurement which are not of interest to the user For example Input Spatial ROI is used when running measurements for reference and test videos which have different aspect ratios Inout Temporal ROI also known as temporal sync is used to execute measurements just for selected frames and minimize the measurement execution time Fie View Configure Execute Help Vi hew J Measure Current pun Beview Sp M v IH X Er A Me 333777 Unis n T 3 p i444 B R gt ib gt i B ores SD Out Output Spatial ROL Configure Update Graphs amp Time uer n a adi GV_test 420 Ebit 1920x1080 020 PSNR dB C Video AEU testGV test 420 Bbit 1920x1080 Results 020 PSNR dB csv Min 40 576 Max 41087 Overali 40 921 Output spatial ROI on review mode for in depth investigation Output ROIs can be used to review precalculated measurement results for only a subregion or temporal duration Output Spatial ROI is instantly selected by mouse operation and g
36. use interface The PQA has two modes Measurement and Review The Measurement mode is used to execute the measurement selected in the Configure Graph display with time shift Dialog During measurement execution the summary data and map results Bra are displayed on screen and saved to the system hard disk The Review lomo GAGE Qu mode is used to view previously saved summary results and maps created either with the measurement mode or XML script execution The user can choose multiple results in this mode and compare each result side by side using the synchronous display in Tile mode Comparing multiple results maps made with the different CODEC parameters and or different measurement configurations enables easy investigation of the root cause of any difference Multiple result display Resultant maps can be displayed synchronously with the reference and test video in a summary six tiled or overlaid display n le Wre Installed Sequences V031051 Stnpy jogger 1280720p 3mbs Rewits A X e 80 woos Six tiled display In Six tiled display the user can display the 2 measurement results side by side Each consists of a reference video test video and difference map to compare to each other Summary graph In Summary display the user can see the multiple measurement graphs with a barchart along with the reference video test video and difference map during video playback The user also ca
37. version SD to CIF measurement class Format conversion HD to SD measurement class Format conversion CIF to QCIF measurement class 027 Rotated Edges Weighted PSNR dB measurement Picture Quality Analysis Sysem PQA600A Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA Edge Blockiness NA dB units Spatial 028 DC Blocking Weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA DC Blockiness NA dB units spatial Requires Options BAS and ADV 029 Artifact Annoyance Weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA All artifacts NA dB units spatial selected Use View model to resample shift and crop test to map to measurement Requires Options BAS and ADV 030 SD DVD from D Cinema Artifact weighted PSNR dB measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection NA Auto align Selected NA All artifacts NA dB units Spatial selected 031 CIF from SD Broadcast Artifact weighted PSNR dB measurement Display mod
38. w model PSNR Perceptual Artifact Attention model Summary node difference detection HD Broadcast ITU R BT 500 NA Typical NA Default DMOS Units Re CRT weightings BT 500 Training 011 CIF and QVGA ADMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection CIF QVGA LCD 7 scrn heights NA Typical NA Default DMOS Units Re 20 cd m weightings BT 500 Training 012 SD Sports Broadcast ADMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD Broadcast ITU R BT 500 NA Typical NA Motion and DMOS Units Re CRT Foreground BT 500 Training Dominant 013 HD Sports Broadcast ADMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection HD Broadcast ITU R BT 500 NA Typical NA Motion and DMOS Units Re CRT Foreground BT 500 Training Dominant 014 SD Talking Head Broadcast ADMOS measurement Display model View model PSNR Perceptual Artifact Attention model Summary node difference detection SD Broadcast ITU R BT 500 NA Typical NA Motion and DMOS Units Re CRT Foreground BT 500 Training Dominant Picture Quality Analysis Sysem PQA600A Repurposing reference and test are independent Use any combination display model and viewing conditions with each measurement Requires Option BAS Forma
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