standards subgroup of the digital television working group

Standards SubgroupOf the Digital Television Working Group

Standards SubgroupOf the Digital Television Working Group

UPDATEUPDATE

PresenterPresenter

John Knox, Manager Video Applications GroupLangley Research Center

John Knox, Manager Video Applications GroupLangley Research Center

DTV WORKING GROUPStandards Sub-GroupDTV WORKING GROUPStandards Sub-Group

5.1.1 5.1.1 HighHigh Definition Definition5.1.1 5.1.1 HighHigh Definition Definition

Aspect Ratio: 16X9

Frame Rate: Film Transfer - 24 FPSProduction - 30 FPSAnalysis - 60 FPS

Scanning: TBD Following Testing

Resolution: TBD Following Testing

Aspect Ratio: 16X9




Picture FormatsPicture Formats

UpdateUpdate


5.1.1 5.1.1 HighHigh Definition Definition5.1.1 5.1.1 HighHigh Definition Definition

Aspect Ratio: 16X9




Aspect Ratio: 16X9




HD Test ConfigurationHD Test ConfigurationHD Test ConfigurationHD Test Configuration


Used portable 720p and 1080i camerasUsed portable 720p and 1080i cameras HD-D5 VTR for recording bothHD-D5 VTR for recording both Evaluation using same monitor for both HD signalsEvaluation using same monitor for both HD signals Multiple test subjectsMultiple test subjects

Resolution ChartResolution Chart

Line, Text and Back-Focus charts, static & rotatingLine, Text and Back-Focus charts, static & rotating

$20 bill$20 bill

Soccer BallSoccer Ball

Used portable 720p and 1080i camerasUsed portable 720p and 1080i cameras HD-D5 VTR for recording bothHD-D5 VTR for recording both Evaluation using same monitor for both HD signalsEvaluation using same monitor for both HD signals Multiple test subjectsMultiple test subjects

Resolution ChartResolution Chart

Line, Text and Back-Focus charts, static & rotatingLine, Text and Back-Focus charts, static & rotating

$20 bill$20 bill

Soccer BallSoccer Ball

Test MethodologyTest Methodology


Analog-to-DigitalAnalog-to-DigitalConverterConverter

RemoteRemoteControlControl

Y, Y, Pb, PrPb, PrAnalogAnalog

Fiber/Fiber/CopperCopper

Camera CableCamera Cable

ProgressiveProgressiveCameraCamera

InterlaceInterlaceCameraCamera

CameraCameraControl UnitControl Unit

HD-SDIHD-SDI

HDHDSDISDI

HD-D5HD-D5

HD-D5HD-D5

DigitalDigitalWFMWFM

30”30”1000 TVL1000 TVLMonitorMonitor

Y, Y, Pb, PrPb, PrAnalogAnalog

HD Test ConfigurationHD Test ConfigurationHD Test ConfigurationHD Test Configuration

MethodologyMethodology

Test ResultsTest Results


InterlaceInterlace Freeze Frame Freeze FrameInterlaceInterlace Freeze Frame Freeze Frame

Note:

Blurred Lines

Note:

Blurred Lines


ProgressiveProgressive Freeze Frame Freeze FrameProgressiveProgressive Freeze Frame Freeze Frame


Note:

Clear Line Definition

Note:



The World’s Most Cost Effective HD Test ChartThe World’s Most Cost Effective HD Test ChartThe World’s Most Cost Effective HD Test ChartThe World’s Most Cost Effective HD Test Chart

Test MethodologyTest Methodology

Area of InterestArea of Interest


ProgressiveProgressive Freeze Frame Freeze FrameProgressiveProgressive Freeze Frame Freeze Frame

Note:


Note:




InterlaceInterlace Freeze Frame Freeze FrameInterlaceInterlace Freeze Frame Freeze Frame


Note:

Moire

Note:

Moire


InterlaceInterlace Freeze Field Freeze FieldInterlaceInterlace Freeze Field Freeze Field

Note:

Smear

Swirl Direction

Note:

Smear

Swirl Direction



ProgressiveProgressiveProgressiveProgressive


InterlaceInterlaceInterlaceInterlace

CorrectCorrect

IncorrectIncorrect


Interlace Scan showed artifacts, distortionInterlace Scan showed artifacts, distortionInterlace Freeze Interlace Freeze FramesFrames have interfield jitter on moving objects have interfield jitter on moving objects

Interlace Freeze Interlace Freeze FieldsFields are inaccurate (Interlace line pairing and effective are inaccurate (Interlace line pairing and effective line doubling of output caused distortions)line doubling of output caused distortions)

Progressive Scan video showed Progressive Scan video showed NONO artifacts artifacts

Interlace Scan showed artifacts, distortionInterlace Scan showed artifacts, distortionInterlace Freeze Interlace Freeze FramesFrames have interfield jitter on moving objects have interfield jitter on moving objects

Interlace Freeze Interlace Freeze FieldsFields are inaccurate (Interlace line pairing and effective are inaccurate (Interlace line pairing and effective line doubling of output caused distortions)line doubling of output caused distortions)

Progressive Scan video showed Progressive Scan video showed NONO artifacts artifacts

Test ResultsTest ResultsTest ResultsTest Results

ConclusionConclusion


Interlace cameras discharge the entire CCD every field. Adjacent Interlace cameras discharge the entire CCD every field. Adjacent line pairs are combined on the output. This effectively reduces line pairs are combined on the output. This effectively reduces vertical resolution by 30% on either frame or field basisvertical resolution by 30% on either frame or field basisA 1080i A 1080i frameframe has 756 lines of vertical resolution without taking interlace has 756 lines of vertical resolution without taking interlace

artifacts into accountartifacts into account

A1080i A1080i fieldfield has 378 lines of vertical resolution has 378 lines of vertical resolution Effective resolution of Sony HDCAM is 1440 X 756 with interlace Effective resolution of Sony HDCAM is 1440 X 756 with interlace

artifacts evident in freeze frames and distortion in freeze fieldsartifacts evident in freeze frames and distortion in freeze fields Interlace scan video originated for production use (Public Affairs,

etc.) may not be suitable for analysis

Interlace cameras discharge the entire CCD every field. Adjacent Interlace cameras discharge the entire CCD every field. Adjacent line pairs are combined on the output. This effectively reduces line pairs are combined on the output. This effectively reduces vertical resolution by 30% on either frame or field basisvertical resolution by 30% on either frame or field basisA 1080i A 1080i frameframe has 756 lines of vertical resolution without taking interlace has 756 lines of vertical resolution without taking interlace

artifacts into accountartifacts into account

A1080i A1080i fieldfield has 378 lines of vertical resolution has 378 lines of vertical resolution Effective resolution of Sony HDCAM is 1440 X 756 with interlace Effective resolution of Sony HDCAM is 1440 X 756 with interlace

artifacts evident in freeze frames and distortion in freeze fieldsartifacts evident in freeze frames and distortion in freeze fields Interlace scan video originated for production use (Public Affairs,

etc.) may not be suitable for analysis




Progressive cameras by definition have no fields and thus exhibit Progressive cameras by definition have no fields and thus exhibit no interfield jitterno interfield jitter

ProgressiveProgressive had better performance at normal play speed

ProgressiveProgressive had better performance in still frame

ProgressiveProgressive converted to other video formats well, without artifactsProgressive video generated for analysis purposes can be easily

and transparently converted to interlace, if necessary, for Public Affairs use

Progressive cameras by definition have no fields and thus exhibit Progressive cameras by definition have no fields and thus exhibit no interfield jitterno interfield jitter

ProgressiveProgressive had better performance at normal play speed

ProgressiveProgressive had better performance in still frame

ProgressiveProgressive converted to other video formats well, without artifactsProgressive video generated for analysis purposes can be easily

and transparently converted to interlace, if necessary, for Public Affairs use




720p transcoded to 1080i -720p transcoded to 1080i -No visible artifacts are introduced in the transcodingNo visible artifacts are introduced in the transcoding

A progressive scan of the $20 bill shot transcoded to 1080i showed A progressive scan of the $20 bill shot transcoded to 1080i showed fewer artifacts than the 1080i originalfewer artifacts than the 1080i original

1080i transcoded to 720p -1080i transcoded to 720p -Interlace artifacts were still visibleInterlace artifacts were still visible

720p transcoded to 1080i -720p transcoded to 1080i -No visible artifacts are introduced in the transcodingNo visible artifacts are introduced in the transcoding

A progressive scan of the $20 bill shot transcoded to 1080i showed A progressive scan of the $20 bill shot transcoded to 1080i showed fewer artifacts than the 1080i originalfewer artifacts than the 1080i original

1080i transcoded to 720p -1080i transcoded to 720p -Interlace artifacts were still visibleInterlace artifacts were still visible



5.1.1 HD Standards Summary5.1.1 HD Standards Summary5.1.1 HD Standards Summary5.1.1 HD Standards Summary


Scanning - Progressive

Resolution - 1280 X 720

Scanning - Progressive

Resolution - 1280 X 720

RECOMMENDATIONS


5.1.2 5.1.2 StandardStandard Definition Summary Definition Summary5.1.2 5.1.2 StandardStandard Definition Summary Definition Summary


SMPTE 259M (CCIR 601), 720 X 480

Scanning - Interlace or Progressive

Aspect ratio - 4:3 or 16:9 (Should be switchable)

SMPTE 259M (CCIR 601), 720 X 480

Scanning - Interlace or Progressive

Aspect ratio - 4:3 or 16:9 (Should be switchable)

RECOMMENDATIONS


5.2.1 5.2.1 AudioAudio Summary Summary5.2.1 5.2.1 AudioAudio Summary Summary


Acquisition - AES-3 Uncompressed

Post Production Recording/Editing - TBD

DistributionContribution - AES-3 Uncompressed

Viewing - AC-3

Acquisition - AES-3 Uncompressed

Post Production Recording/Editing - TBD

DistributionContribution - AES-3 Uncompressed

Viewing - AC-3

RECOMMENDATIONS


Thank YouThank You

Standards Subgroupfor the Digital Television Working Group

Standards Subgroupfor the Digital Television Working Group

standards subgroup of the digital television working group

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