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Ohio Cable Institute - Nov. 13, 2002

HDTV and the Subscriber’s HomeHDTV and the Subscriber’s Home

Rich [email protected] Research Center USA, Inc.

mailto:[email protected]


The roadmapThe roadmap

DTV signal basicsVideo interconnectionsAudio interconnectionsExample set-topsDTV receiversConclusions


ATSC set standards for DTVATSC set standards for DTV

A/52 for audioBased upon AC3 (Dolby Digital)

A/53 for videoBased upon MPEG2 Table 3 of Annex A defines 18 formats

Vertical and horizontal resolutionsScan ratesProgressive or interlaced scanningAspect ratios


Aspect Ratio DifferencesAspect Ratio Differences

16:9 Display

4:3 Display


Stretch Format

The 4:3 image is horizontally expanded to fit the screen.

Zoom Format

The 4:3 image is enlarged horizontally and vertically to fit the screen, partially concealing the image.

“Pillar-box” Format

Two gray bars appear on the left and right of the screen.

Showing 4 x 3 Image on 16 x 9 DisplayShowing 4 x 3 Image on 16 x 9 Display


Showing 16 x 9 Image on 4 x 3 DisplayShowing 16 x 9 Image on 4 x 3 Display“Letter-box” Format

Two gray bars appear on the top and bottom of the

screen.Center (Zoom)

Format

The left and right of the image are concealed.

Squeeze Format

16:9 image is horizontally

compressed to fit the screen.


ATSC’s 18 display formatsATSC’s 18 display formats

480p 480i30

24, 30, 604:3640480

480p 480i30

24, 30, 604:3704480

480p 480i30

24, 30, 6016:9704480

720p24, 30, 6016:91280720

1080p 1080i30

24, 3016:919201080

Common Name

Interlaced Scan Rates

Progressive Scan Rates

H:V Aspect Ratio

Horz. Reso-lution

Vert. Reso-lution


CEA groupings based upon displaysCEA groupings based upon displays

HDTV – High Definition TelevisionAt least 720 vertical lines progressive scanAt least 1080 vertical lines interlaced scan

EDTV – Enhanced Definition TelevisionAt least 480 vertical lines progressive

SDTV – Standard Definition TelevisionUsable picture with fewer lines than EDTV

All must decode all 18 ATSC formats


Cable’s other 17 formats (ANSI/SCTE 43 2001)Cable’s other 17 formats (ANSI/SCTE 43 2001)

29.9723.9763:4352480

29.9723.9763:4528480

29.9723.9763:4544480

3024, 30, 603:4720480

3024, 30, 609:16720480

3024, 309:1614401080

Interlaced Scan Rates

Progressive Scan Rates

V:H Aspect Ratio

Horz. Reso-lution

Vert. Reso-lution


OpenCableOpenCable only requires decoding of lower resolutionsonly requires decoding of lower resolutions

OpenCable specifications split formats into two groups.

Lower 21 resolutions (includes 9 ATSC)OpenCable set top must decode these, as well as pass-thru to DTV receiver.

Higher 14 resolutions (includes 9 ATSC) OpenCable set-top must pass-thru to DTV setThese 14 formats all require processing over 18 million pixels per second.


Analog video interconnectionsAnalog video interconnections

Composite (CVBS)RGB

VGA RGBHV

Consumer equipment uses RCA jacksProfessional equipment uses BNC

S-VideoComponent (Y Pb Pr)

Consumer equipment uses RCA jacksProfessional equipment uses BNC

1 2 3 4 5

11 12 13 14 156 7 8 9 10

4

2

3

1


Digital video interconnectionsDigital video interconnections

1394-based IEEE-1394EIA-775HAVi (Home Audio Video interoperability)HDNI (ANSI/SCTE 26 2001 - formerly DVS 194)

Digital Visual Interface (DVI)Digital only version Analog/Digital version

Adds RGBHV for VGA compatibilityHigh-bandwidth Digital Content Protection (HDCP)

6

4

2

5

3

1

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24


Audio interconnectionsAudio interconnections

Baseband audioRCA jacks: Red right, white left

PCM*RCA jackOptical via Toslink

Dolby Digital*RCA jackOptical via Toslink

* Select either PCM or Dolby Digital to output on same connector.


Other interfacesOther interfaces

Universal serial bus (USB)• Provides interface to printers, keyboards and other peripherals

1 2 3 4


ExamplesExamples

Digital cable set-top boxesExample set-top (without HDTV)Example set-top with HDTV capability

Consumer digital televisions


BD-V3500REAR PANEL

Baseband audio output connectorsBaseband audio input connectors

Baseband video output connectorBaseband video input connector

Baseband S-video output connector

Digital audio output connector

USB connectorSerial port connector

TO TV outputconnector

UL caution label

CABLE IN inputconnector

AC power inletAC power outlet

IR CONTROL jack

SERIALIRCONTROL PORTDO NOT OPEN

RISK OF ELECTRIC SHOCKCAUTION

DIGITALAUDIO OUT

S-VIDEOOUT

TO TV

L

R

VIDEO

INOUT

CABLE IN

AC OUTLETSWITCHED/UNSWITCHED

400W(3.2A)MAX

120V AC60Hz

AC INLET

USB

* * * * * * * * * * * * *

* * * * * * * * * * * * * * * * * *

NE PAS OUVRIRDANGER D'ELECTROCUTION

ATTENTION

Typical Digital Cable SetTypical Digital Cable Set--top Without HDtop Without HD


Example SetExample Set--top with HDTV Capabilitytop with HDTV CapabilityBD-V3500HDREAR PANEL

Baseband audio input connectors

Baseband video output connector

Baseband S-video output connector

Digital audio output connector

CABLE INinput connector

AC power inletUL caution label

Digital video output (DVI-D) connectorIR CONTROL jack

Serial port connectorUSB connector

Baseband audio output connectors

Baseband video input connectorComponent video output jacks

Baseband audio output connectors(Used with the Y-Pb-Pr or the digital video output connector)


Example features (BDExample features (BD--V3500HD)V3500HD)

DVI with HDCP (Copy Protection) Digital sound on analog and digital channels using S/PDIF outputSupports 16/18 ATSC formats

All 480I, 480P, 720P, 1080I, but not two 1080P formats (none broadcast)Supports both 16X9 and 4X3 images and displays

Same formats are passed through16:9 images →16:9 screen4:3 images → 4:3 screen

Allows for 6 different preferred display choicesSidebars, Zoom, Stretch, Letterbox, Center, Squeeze

Software also eliminates Box-in-Box formats to maximize image size


DTV receivers, monitors and setDTV receivers, monitors and set--topstops

DTV receivers may beFully integrated into one unitSeparate monitor and set-top decoder

Matched so that same interfaces are on both

Most common on DTV monitors:1. HD component video input (Y Pb Pr)2. VGA input3. RGBHV input

Strong trend for DTV monitors, and some receivers:Many introducing DVI (with HDCP)


Where can I get current DTV info?Where can I get current DTV info?

This Week In Consumer Electronicswww.twice.com maintains lists of:

DTV products & retailersDTV broadcasters & programs

CEA and TWICE print this data in:DTV Guide published quarterly

Download at www.ce.org

Some web sites list DTV programs:http://www.titantv.com/TTV/RetailZone/main.asp?pid=Zenith


ConclusionsConclusions

DTV appears in many different video formats:18 different video formats for broadcasters35 different video formats over cable

HDTV uses new interfaces:Analog component video (Y Pb Pr)Digital compressed video (e.g. HDNI)Digital uncompressed video (DVI)

Mastering these can help you prepare for your subscribers’ changing needs in this DTV age!


Thank you!Thank you!

Rich [email protected] Research Center USA, Inc.

RFA 11-13-02

mailto:[email protected]

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