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The BBC plans to make high-definition television available through its online ... To be able to legally sport the logo a display device must... – PowerPoint PPT presentation

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Title: TV

TV associated buying advice
  • Whats going on in the jungle of new screens,
    formats, high definition, digital switchover
  • Hope your ability is better than -

HDTV - present and immediate future
  • Available forthcoming services
  • Display devices
  • PVRs and recording devices
  • The analogue switch off and its effect.
  • Modulation and encoding
  • HDef resolutions and HD ready
  • The HiDef DVD format war (HD-DVD vs BluRay)
  • Analogue and digital connections
  • Some practical pointers to choosing a TV.

  • Sky digibox to freeview
  • This site looks like the kind of place where I
    get the answer!I have a Sky digibox (Sony)
    which I am trying to transform into a freeview
    box (I now have a Sky box so this one is no
    longer of use). So I am plugging it into the TV
    aerial, but it says 'no sattelite signal being
    received'.Is this a problem with my aeial not
    being a digital aerial? Or is it no possible to
    transform a Sky digibox into a freeview box?I
    should also point out that I do not have a
    viewing card into my box (i.e. it is now in the
    Sky box) - do I need to purchase a Freeview
    card?? If this is not possible - was told it
    was - I will simply go out to purchase a new
    Freeview box. I just wanted to make use of my Sky

Similar confusion in USA
  • Broadcasting and Cable via NewsEdge Corporation
    If you haven't shopped for HDTV yet, the first
    thing you'll encounter is confusion. You want LCD
    or DLP? Or LcoS? Flat-screen or rear-projection?
    Get ready to hear about pixels and
    resolution--"Sir, would you prefer 1,080 lines
    drawn on-screen in an odd/even or interlaced
    pattern, or 720p, 720 lines scanned in one sweep,
    or progressively? Plasma or cathode-ray tubes?"
  • There is so much to know about HDTV. A co-worker
    told me the story of his friend, who had just
    bought a big-screen HDTV and invited everyone
    over to watch the game. They stood around
    oooohing and aaaahing.
  • But my co-worker, who owns an HDTV, thought
    something was amiss. Turns out that, while the
    friend owned an HDTV, he didn't know that he also
    needed to upgrade his cable box to HDTV.
    (Research shows as many as half the consumers
    with HDTV sets aren't actually receiving it.)
  • I contacted a friend who had just bought an HDTV
    and had used Consumer Reports as his guide to
    help me sift through all the confusion. I
    determined that a 36-inch screen fit my family's
    needs perfectly. For that size, Consumer Reports
    says sets with cathode-ray tubes, although bulky
    and heavy, still offer the best picture quality
    and value.
  • The magazine recommended a Sony model selling for
    about 1,100. Circuit City had a floor model for
    sale for around 900. We were in the process of
    buying it when the salesman mentioned that the
    set he had in his house was better. (I bet he
    says that to all his customers.)
  • It was a Polaroid--yes, a Polaroid. He showed me
    a lightweight, plasma Polaroid. It was
    beautiful--just an inch or so deep, and I could
    lift it with one hand. Impulsively, I changed my
    mind. I took it home and turned on the football
    game. My son saw it and proclaimed, "Dad, it's
    all blurry." He was right. So I boxed it up, took
    it back and got the Sony.
  • The Sony picture was clear and clean, even before
    I had it hooked up to HDTV. Now I thought it
    would be a good time to try something really new.
    Rather than get my HDTV set-top box from a cable
    or satellite provider, I could use Verizon Fios.
    (We happen to live in Keller, Texas, the first
    area in the country to offer Verizon's new
    fiber-optic connection.)
  • We watched our first NFL playoff game in HDTV,
    and it was beautiful. When we watched an HDTV
    underwater special on the Discovery channel, we
    thought the fish would jump through the screen.
    Everything is beautiful. Letterman and Leno
    somehow seem funnier in HDTV.
  • As my son remarked, "Life should be in HDTV,
  • Indeed, son, indeed.

After analogue TV ceases ?
  • 1st Border 20082nd West Country 20083rd HTV
    Wales 20084th Granada 20095th HTV West 20096th
    Grampian 20097th Scottish TV 20098th Central
    20109th Yorkshire 201010th Anglia 201011th
    Meridian 201112th Carlton/LWT 201113th Tyne
    Tees 201114th Ulster 201115th Channel 2012

What do we do after 2009 ?
  • Can use analogue TV with STB
  • Existing Freeview , ky or cable boxes can be
    connected to old TVs via SCART
  • Some boxes have modulator so connection via
    aerial socket possible
  • Very few Freeview STBs have a modulator- SCART or
    phono connection only.

After 2009 continued
  • VCRs may not be much use but modulator may
    allow them to act as interface between Freeview
    STB and non-SCART TV.
  • VCR being ousted by PVR / DVD recorders anyway
  • Not many of above have 2 tuners (for recording 1
    channel whilst viewing another).

Communal aerial SMATV issues
  • THOUSANDS of Glasgow tenants could have their
    tellies switched off - unless housing bosses act
  • Satellite TV giant Sky today warned that social
    landlords across the city are being too slow in
    changing over to digital technology.
  • And the Government plans to stop broadcasting in
    the old analogue system as early as 2009.
  • Many tenants and home owners have already
    switched to digital by buying a set-top box from
    Freeview or a satellite dish from Sky.
  • But social landlords - housing associations and
    councils - have to make the switch for tenants
    who live in large buildings, such as tower
    blocks, with communal aerials.
  • Simon Jackson, Head of Sky Homes, said "In just
    two years' time, the Government plans to begin
    switching off analogue television - landlords
    need to act now to upgrade their aerial systems."
  • Glasgow and the west of Scotland, which has a
    higher density of tower blocks than anywhere else
    in Britain, is particularly vulnerable.
  • The UK Department for Culture, Media and Sport,
    the Government's ministry in charge of the
    switchover, last year revealed that half of all
    registered landlords had not even started
    upgrading their aerial systems.
  • One Glasgow housing association, however, is well
    on the way to sorting things out for its tenants
    bygiving them early access to all the free-to-air
    channels available, like CBBC, BBC3 and Sky News.

  • There are no Twin Tuner PVRs that also have DVD
    burners.You can buyAn HDD-DVD machine with a
    single Freeview tunerAn HDD only machine (PVR)
    with two tuners.If you get the latter, you can
    connect via RGB (preferably) to your existing DVD
    recorder and create a disc for something you want
    to keep.
  • You can also use the internal HDD for
  • Editing features on PVRs are usually very

Sky Hi-Def plans
  • http//
  • Launches in 2006
  • Sky HiDef box (400) will initially output HD
    via its analogue component outputs
  • Ultimately will only output HD via (secure) HDMI
    (digital) output
  • HDMI uses HDCP content protection- requires
    display device with HDCP built in

Late March 2006 ky announcement
  • Sky has moved closer to the launch of its
    (HDTV) service. The company today announced
    pricing details and confirmed that the first
    installations of Sky HD are scheduled to begin in
    May 2006.
  • Customers will pay 299 ( 433) for the Sky HD
    set-top box and 10 ( 14) per month in addition to
    their Sky digital subscription. As an
    introductory offer, standard installation of Sky
    HD is free for all new or existing Sky digital
    subscribers taking a Sky HD subscription.

BBC press release ,Feb 20th 2006
  • BBC commits to HD on FreeSat and onlineThe BBC
    plans to make high-definition television
    available through its online media player and
    free satellite platforms. The corporation's plans
    come as British Sky Broadcasting is expected to
    launch commercial HD services within three
    months, predicting the number of homes with sets
    capable of displaying high-definition images will
    rise from 700,000 to 2.1m this year.Ashley
    Highfield, the BBC's director of new media and
    technology, said "We want to be ready to move
    with HD on to FreeSat and I'm also very
    interested in getting HD on to the interactive
    media player."

Sky Italia
  • SKY Italia HD package.
  • SKY Italia has leased an additional HOT BIRD
    transponder taking its total capacity used across
    Eutelsat's HOT BIRD satellites to 18
    transponders. Launches 17th May with live
    coverage of the European Champions League Cup
  • In June, SKY Italia will cover 2006 World Cup.
    sting in DVB S2 with MPEG4 compression.
  • SKY Italia will put up to 5 HDTV channels in a
    single HOT BIRD transponder

Other HD sources
  • BBC carrying out tests and announced HD via
    satellite by May/June 2006
  • NTL / Telewest making HD noises nothing firm .
    Telewest previewed an MPEG2 HiDef box at IBC in
    Sept 2005. My spies tell me it is now trialling
    in UK (made by SA) and has HDMI output.
  • HD1 (formerly Euro1080) already available. This
    is currently using MPEG2, will move to MPEG4
  • German channel Premiere, Sat1 , ProSieben
  • Astra and French HD tests
  • Check http//
  • http//

Modulation and encoding
  • MPEG4, especially H264/AVC, much more efficient
    vs MPEG2 (but needs more processing power).
  • DVB-S2 (usually combined with 8PSK instead of
    qpsk) enables more channel efficiency.
  • If used for terrestrial will obsolete the MPEG
    decoder in current IDTVs STBs.
  • IDTV owners would have to buy an external STB ,
    defeating the original object of integration !

HD Ready (what this logo should mean)
  • To be able to legally sport the logo a display
    device must
  • Have at least 720 lines native resolutionHave
    approx 169 aspect ratioHD inputs must accept
    720p and 1080i resolutionHD inputs must accept
    component and digital inputs HD inputs must
    accept 50 and 60HzDigital inputs may be DVI or
    HDMIDigital inputs must accept HDCPThere are
    many sets that do not meet those requirements,
    and they will be cheaper than those that do.
  • HD compatible means either the set was produced
    before the logo certification system existed or 1
    or more of the above conditions is not met (e.g.
    no digital input)

  • 720P 1280 x 720 pixels , progressive
  • 1080i 1920 x 1080 pixels , interlaced i.e.
    sequential fields(input)
  • 1080p 1920 x 1080 pixels, pixels updated twice
    as often.
  • Forget 1080P at present no affordable sources
    (some 1000 HD-DVD players, possibly some games
  • 1080P needs lots of bandwidth (expensive to
  • Would need 50 or 60 inch screen viewed from less
    than 8 feet to notice any difference !
  • May be affordable (under 2000) by 2008
  • NB EDTV 852 x 480 (USA marketing term)

High Definition DVD format war
  • BluRay Sony (new Playstation has Blu-Ray DVD
  • HD-DVD Toshiba Microsoft and Intel
  • Hollywood split Time Warner, Paramount, NBC
    Universal Viacom HD-DVD. Disney, Fox , Sony
    and MGM (Sony owned) backing Blu-Ray
  • Samsung already announced a hybrid DVD player
    others hopefully will follow

HD-DVD camp
  • Microsoft CorpIntel CorpToshiba-Samsung Storage
    Technologies (TSST)NEC CorporationToshiba
    CorporationSanyo CorporationMemory-Tech
    CorporationVerbatim (Mitsubishi Kagaku Media Co
    Ltd)Hitachi Maxell LtdDM holdings Inc
    (DenonMarantz)Alpine Electronics IncOnkyo
    CorporationBandai Visual Co LtdFuji Photo Film
    Co LtdKenwood CorporationRicoh Company
    LtdFunai Electric Co LtdRitek CorporationAcer
    IncKonica Minolta Opto IncTeac
    CorporationSumitomo Heavy Industries LtdToho
    Company LtdViacom (owns Paramount Pictures
    Home Entertainment, and 33 of United
    International PicturesGeneral Electric majority
    owner Vivendi 20 of NBC-Universal which
    includes Universal Pictures)Time Warner
    Inc(Warner Brothers, New Line Cinema, Warner
    Music)Digital Theater Systems IncDolby
    Laboratories IncImation CorpProdisc Technology
    IncRitek CorporationThomson

Blu-Ray camp
  • - Sony Corporation - Sony BMG Music
    Entertainment- Hitachi Ltd- Mitsubishi Electric
    Corporation, Mitsubishi Kagaku Media Co Ltd
    (Verbatim)- Panasonic (Matsusita Electric)-
    Victor Company of Japan, Limited (subsidiary of
    Matsu)- Pioneer Corporation- Sharp
    Corporation- TDK Corporation- Yamaha
    Corporation- DM holdings Inc (DenonMarantz)-
    Onkyo Corporation- Sanyo Electric Co Ltd-
    Mitsumi Electric Co Ltd- Kenwood TMI Corp-
    Canon Inc- Fuji Photo Film Co Ltd- Ricoh Co
    Ltd- Konica Minolta Opto Inc- Alpine
    Electronics Inc- Funai Electric Co Ltd- TEAC
    Corporation- Toho Company Ltd- Toei Video
    Company Ltd- Bandai Visual Co Ltd- Disney Corp
    (Touchstone Pictures, Buena Vista International,
    Miramax Pictures, Hollywood Pictures, Dimension
    Films)- Apple Corp- Dell Inc.- Hewlett Packard
    Development Company- Imation Corp- Memorex
    Products Inc- Texas Instruments Inc- Sun
    Microsystems Inc- Digital Theater Systems Inc-
    Dolby Laboratories Inc- Sigma Designs Inc-
    nVidia Corporation- Sdi Media America-
    Electronic Arts Inc- Lsi Logic Corporation- LG
    Electronics Inc- Samsung Electronics Co Ltd-
    Daewoo Electronics Corporation- BenQ
    Corporation- Lite-On It Corporation- Ritek
    Corporation- CMC Magnetics Corporation-
    Optodisc Technology Corporation- Prodisc
    Technology Inc- MediaTek Inc- Royal Philips
    Electronics- Thomson- Vivendi Universal Games-
    Ati Technologies, Inc- Meridian Audio Ltd- News
    Corp (Twentieth Century Fox Film, Fox
    searchlight) AUSTRALIA- Lions Gate Inc-
    Universal Music- Zoran corporation

Differences Blu-ray and HD DVD ?
  • Each has single-layer and dual-layer formats.
  • HD DVD - 15GB and 30GB
  • Blu-ray - 25GB and 50GB.
  • Toshiba had expected HD DVD earlier (this year)
    but now plans to launch products worldwide in Q1,
  • Coincides with spring launch of Blu-ray,
    eliminating the early debut advantage.
  • Blu-ray uses Sun Microsystems' Java software for
    built-in interactive features, whereas HD DVD
    uses a technology called iHD that Microsoft and
    Toshiba have worked on.

Display types
  • CRT (not many are HD)
  • Plasma on 6th-8th generation
  • LCD improving fast
  • SED likely from 2007or 8 1080p for 50 inch
  • RPTV (DLP, LDC, LCoS). Good value, large n dark
  • HT projectors prices dropping needs large room
  • http//

CRT Cathode Ray Tube
  • So-called direct view technology.
  • Few HD models (Samsung, Sony , LG making slimmer,
    Philips ?)
  • Geometry issues but best contrast etc.

  • Progressive scan by default
  • Response times improving (impossible to compare like with like as no
    standard method of specifying this ! This is 1
    cause of motion tracking errors.
  • Backlight technology improving
  • Some have audible hum/Buzz (PSU compromises in
  • Insects can get trapped between layers !
  • Not childproof unless extra glass front like
    Loewe models
  • Half power of plasmas
  • Contrast / greyscale issues poor blacks /
    greys. Easy to cook the specs to get high
    numbers on the glossy !
  • Watch for dead pixels manufacturer policies vary

Dead Pixel policies and examples (CTL)
  • 12" - 17" LCD Screens 2 lit, 2 unlit, or 4
    colored non-performing pixels
  • 19" 20" LCD Screens 4 lit, 4 unlit, or 7
    colored non-performing pixels

Plasma screens
  • Power hogs
  • Good brightness / contrast
  • Possible image burn in issues (logos if static)
  • Regassing myth !
  • Many are not HD how good is internal scaling ?

RPTV (Rear Projection)
  • Great value if you have the space
  • Full 1080p available needs 60 inch to
    distinguish advantage
  • Poor brightness in daylight conditions
  • Lots of space for connectivity
  • Cheap way to get attention grabber tends to
    dominate a living room !

Home Theatre Projector
  • Great if you have dedicated room / space
  • UXGA / HD types
  • Same technology base as RPTV
  • Next
    some future happenings.

SED - Surface-conduction Electron-emitter Display
  • http//
  • Promises to eventually oust LCD / TFT with better

HDR LCD the future ?
  • A new patented variation on LCD backlighting from
  • http//
  • Apparently very impressive
  • Not yet licenced by the main display
    manufacturers will initially be costly
  • Relies on dynamic variation of backlight level
  • 50,000 for current 50-inch display !!!!
    (Canadian firm called Brightside , working on
    this since 1999)

LCD improvement
  • Choice of White LED, RGB LED, OLED, CCFL hot
    cathode backlighting
  • LED has aging problems unless compensated for
  • RGB LEDs if switched fast (needs more complex
    control / diver ICs)
  • Dramatic improvements possible as well as purer
  • Luxeon hi-brightness LED market leaders

Color Gamut
130 70 100
Attainable Colors with CCFL LED Backlight
Colors that Human can See
RGB LEDs Controller AD5120
Color Sensors
Power Management
160V/0.4A per channel avg
Color Control
12-Bit ADC
Signal Condition
Look Up Table
Master Blinking
Timing Control
12-Bit PWM_G
Indep SHDN for FSC
12-Bit PWM_R
I2C Control Logic
12-Bit PWM_B
12-Bit PWM_G
Adjustable Digital Ramp
Connections - digital
  • HDMI High Definition Multimedia Interface.
    Supports 165 MPixels/second (almost 5 Gbps). 19
    pins, supports audio packets, TMDS signal
    identical to DVI, 19 pin connector
  • HDMI switches are newish and costly not many
    TVs have more than one.
  • HDMI includes content protection (HDCP).
  • For DVI it is a manufacturers option !
  • DVI Digital Video Interface. No audio,-I has VGA
    (RGB) output (like Graphics cards).

Connections - Analogue
  • VGA analogue RGBHV or RGB Csync
  • YPrPb or component luminance colour
    difference signals , normally using phono sockets
    AKA RCA jacks.
  • SCART has RGB or S-video , Cvbs (composite) and
    audio, fast blanking for RGB, pin 8 I/O
    switching. 21 pins.
  • S-Video Y/C , luminance and chrominance widely
    used in camcorders

Motion Processing artifacts
  • Blurring may be due to
  • internal picture processing assistants (Pixel
    Plus, Crystal Vision etc.)
  • or poor screen response (especially LCD with 25
    mSecs response
  • or poor colourspace conversion or scaling
    (picture size / format conversion)
  • 100 Hz interpolation processing done badly (on
  • Other artifacts can be due to
  • Any of the above
  • Or Poor MPEG decoding
  • Or Over compression of the signal ( usually the
    broadcasters fault) stat-muxing
  • Broadcasters may have used transcoding or
    transrating in the signal chain
  • Look for display that allows turning off
    enhancement features not all do.

MotionBlur (extreme example)
  • The same effect as frame blending (simulated
    motion in some games).
  • Heres the correct image

Motion Blur
  • Look for this by watching a soccer ball
  • There may be other motion artifacts and jerkiness
    also, especially if the video transmission is
    over compressed.
  • Javelin may jerk in flight as well as not
    appearing to be a straight line shape (aliasing

How do you test / preview
  • Take good DVD with you ask shop to play it
    through your chosen display device via decent
    connection (not composite or RF input)
  • Go to A/V specialist shop you may pay a little
    more but youre paying for some decent advice and
  • John Lewis 5 year gtee is often worth paying a
    little extra for (try a price-match attempt 1st)

Testing / Previews (contd.)
  • Dont be fooled by DVD demos showing Toy Story,
    Monsters Inc and similar 3D cartoons
  • These always look good even on a poor display
  • Make allowances for poor signal distribution in
    DSG / Comet etc. when you compare
  • Confirm that viewing angle will be ok for your
    room (especially with LCD displays)

Other points
  • Cables do vary in quality but 30-50 for a
    SCART cable is only a placebo (but it is worth
    paying 5 rather than 1 in order to get
    individually screened cores).
  • Digital connections should be less critical (as
    long as they are built such that they dont fall
    apart after a few insertion/extraction cycles)
  • Surge/spike protectors are worth having,
    especially if they also have RFI filters
  • Forget the guarantee on the above
  • None will protect against a direct (or very near)
    lightening strike.

Brands to look at
  • Genuine Japanese household names (Sony, Hitachi,
    Panasonic,Sharp,Toshiba,JVC , Sanyo, Mitsubishi ?
    etc. )
  • LG Samsung (improving)
  • Loewe
  • (possibly/arguably) B O
  • Dell but newish and unproven for displays
  • Philips and Thomson very variable

Debatable Brands low end of market)
  • Tevion / Medion (Aldi, ToysRus)
  • Video Seven, Crown , Acer
  • Benq (good name in USA)
  • Bush, Goodmans , Alba , Wharfedale, Pye, Grundig
    all are marketing names trying to live off
    reputation they had when they were real
    manufacturing companies
  • H B French marketing company
  • Beko ,Vestel, Fusion Turkish (make low end sets
    for Toshiba, Philips and others as branding
  • Orion, Naiko, Akura, Watson, Mikomi

Some setup hints 1
  • TV channels look same as before HD was installed
  • Have you connected your HD box using the HDMI
    lead ?
  • You could still be actually watching SDTV !
    Ensure your box is set to HDMI output
  • Confirm you are tuned to an HD channel
  • The new HD channels sit alongside the old SD
    ones, and you may inadvertently have tuned in to
    the lower-quality digital signal.

Some setup hints 2
  • Common complaint about new HDTV set-ups is that
    the picture quality of SD material is poor, with
    huge gaps in detail
  • Standard definition programmes have only 480
    lines of information rather than the 720 or 1,080
    of HD.
  • So when you buy a large new flat screen the
    picture quality on SD programmes is woeful.
  • Unfortunately, there's no real affordable
    solution, with upscalers capable of changing 480
    into 720 costing up to GBP1,250 (Lumagen, Iscan
  • Manufacturers promise that next generation of TVs
    will have better upscaling software built-in as

Gaudy bright cloours
  • Not a problem with high-definition, rather the
    way manufacturers set up their TVs before
    shipping them
  • To make them stand out on the shop floor, colours
    are always set too bright and vibrant.
  • Go into your TV's menu, choose the
    picture-settings option and adjust all the
    elements until you get a more natural image.
  • If you need help with this, look out for
    THX-certified DVD movies e.g. Star Wars titles
    many Disney, which often come with THX Optimizer
    in the special features list on DVD. This walks
    you through the process.
  • Otherwise purchase Avia or Video Essentials DVD

Heavy Contrast
  • If the protagonists in your HD drama stand out a
    little too far from the crowd, with what appears
    to be a halo of white around them, it could well
    be that your TV's contrast setting is too high.
  • This is often a problem if you had your
    flatscreen TV before you got HD, and the contrast
    was boosted to improve the picture on SD
  • Similar solution to Overly Bright Colours.
  • Enter your TV's picture-settings menu and adjust
    the contrast until the lines disappear and normal
    service is resumed. If necessary, use a THX
    Optimizer (see box above) to help you calibrate
    the settings.

Films blurred, out of focus
  • Are movies a disappointment ? Perhaps your TV is
    outputting at too low a resolution.
  • There are 2 HD formats 720p and 1,080i.
  • While sport looks great in 720p - faster image
    updates to follow the action more easily this
    is non optimum sharpness for films at this
  • If your HD box's settings menu allows it, set it
    to output to your screen in its 'native'
    resolution - ie, how it's broadcast - rather than
    default to 720p or 1,080i.
  • This allows the processing software in your TV to
    deal with the image and (hopefully) make it look
    its best.

Artifacts in dark areas
  • When you look at the dark areas of an HD image,
    there are annoying amounts of movement in the
    picture, as if the black is 'crawling' across the
  • This irritating problem, known as 'dynamic false
    contouring', is the result of poor signal
  • The answer ?
  • New TV !
  • Be warned, when looking for a new screen -
    particularly from one of the less well known
    brands - ensure you test it with some dark images
    before parting with your money.
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