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Digital Television & Home Theater Audio for Video Basic Acoustics How & Why We Hear Movie & Home Theater Sound-System Configurations, Including Surround Sound Digital Audio Formats: the Good, the Bad, and the Sublime. Sound Basics: What Is Sound? Sound = Traveling Waves Of Air Pressure

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slide1

Digital Television & Home Theater

  • Audio for Video
    • Basic Acoustics
    • How & Why We Hear
    • Movie & Home Theater Sound-System Configurations, Including Surround Sound
    • Digital Audio Formats: the Good, the Bad, and the Sublime.
slide2

Sound Basics: What Is Sound?

  • Sound = Traveling Waves Of Air Pressure
  • Air Pressure Wave: Localized, Temporary, Sequential Increase + Decrease in Air Pressure Around Normal (15 lbs./sq. inch)
  • Each Wave Must Have Both A Positive (pressure increase) And Negative (pressure decrease) Part
    • Overall Air Pressure Cannot Change
  • Think Of Air Molecules Temporarily Bunching Up In Some Places and Spreading Out In Others. The Bunching Up Spreads Like Falling Dominos
slide4

Sound Basics: Frequency

  • A Sequential Increase & Decrease In Pressure Is Called A Cycle.
    • Think of It As A Single Wavelet.
  • A Cycle Takes A Finite Time To Complete
    • Pressure Variation Goes 0 + 0 - 0, or 0 - 0 + 0
  • Sustained Sounds With Repetitive Identical Cycles Have An Associated Fundamental Frequency, F
    • F = The Number Of Cycles Occurring Within A Second Of Time
    • Expressed in Hz. = Cycles/Second
slide5

Sound Basics: Auditory Perception

  • When Sustained Sounds With Repetitive Air Pressure Waves Are Perceived By The Ear, They Give The Sensations Of Pitch & Loudness
    • More Cycles In A Given Span Of Time = Higher Pitched Sound
    • The Greater The Increase & Decrease In Air Pressure Variation Within Each Cycle = The Louder The Sound
slide6

Sound Basics: Hearing Range

  • Pitch Is Perceived Logarithmically In Octaves
    • One Octave Increase = Doubling The Frequency
  • Human Hearing Covers 10 Octaves, From 20 Cycles/Second to 20,000 Cycles/Second
    • Everyday Sounds Are Usually 40 Cycles/Second to 12,000 Cycles/Second
    • The Critical Band For Speech Recognition is 500 Cycles/Second to 2,000 Cycles/Second
slide7

Sound Basics: Wavelength

  • Air Pressure Waves Travel ~ 1,130 ft./sec.
    • A Cycle Of Air Pressure Variation That Takes A Finite Time To Complete Therefore Spreads Out Across a Finite Distance = It’s Wavelength
  • Sustained Sound With Repetitive Identical Cycles Having Fundamental Frequency F, Have Wavelength L Derived By:

L Ft./Cycle = 1.13 Ft./Millisecond / F Cycles/Second

    • Note That The Higher The Frequency (& Pitch), The shorter The Wavelength
slide9

Resonation & Perception

  • Several Air Pressure Waves Simultaneously Traveling Through The Same Space Will Add Together Linearly.
  • So Will Traveling Air Pressure Waves When Trapped Between Two Physical Parallel Boundaries.
    • At Each Boundary Some Sound Passes Through But Most Bounces In The Reverse Direction
    • The Waves Will Continue To Bounce Back And Forth Between Boundaries Until All The Sound Has Leaked Out.
  • Sustained Sounds Will Continually Feed New Air Pressure Waves To Bounce And Add Together Between The Boundaries
slide11

Resonation & Perception

  • For Most Frequencies, Multiple Bouncing Pressure Waves Will:
    • Momentarily Reinforce Each Other Some Places
    • Momentarily Oppose Each Other At Other Places
  • But With No Consistent Pattern.
slide12

Resonation & Perception

  • However, At A Few Frequencies Bouncing Pressure Waves Will Constantly Reinforce Each Other And Always At The Same Places
    • These Places Of Constantly Reinforcing Pressure Waves Are Called “Standing Waves”.
    • As Standing Waves Build In Intensity With Sustained Sound, More Sound “Leaks” Through The Boundaries To The Outside Until Equilibrium Is Reached.
slide13

1

2

Long-Term Average

3

Standing Waves

slide14

Resonation & Perception

  • Which Frequencies Will Produce Standing Waves?
    • Only Those For Which The Distance Between Boundaries Is An Integer Multiple Of The Frequency’s Wavelength
    • I. E. When 1, 2, 3, 4, ... Wavelengths Will Perfectly Fit Between The Boundaries With No Pieces Left Over.
slide15

Resonation & Perception

  • Parallel Physical Boundaries Therefore Act As A Resonator & Filter. Put Sustained Broadband Noise In (Which Contains Many Frequencies):
    • Most Frequencies Will Be Attenuated.
    • A Few Will Be Strengthened and Projected.
    • The Frequencies That Are Strongly Resonated Reveal The Dimensions Of The Resonator.
slide16

Resonation & Perception

  • Real-World Hollow Objects Are 3-Dimensional & Have Many Non-Parallel Boundaries
    • Standing Waves Occur At Many More Frequencies And Vary In Strength.
    • Putting In Sustained Broadband Noise Will Result In Highly Unique And Complex Spectrum Of Resonated Frequencies: A Spectral Fingerprint Of The Physical Object!
    • Strong Survival Value In Discriminating How Strongly Each Frequency (Out Of A Broad Range Of Frequencies) Is Being Reinforced By An Object.
slide17

Resonation & Perception

  • Our Ears Are Spectrum Analysers
    • Inner Ears Compare Strengths Of Different Frequencies Coming From A Single Object.
    • We Can Associate Sounds We Hear With Objects We See, Even When We Can’t See Them!
    • Our Ears Report To Our Brains, Which Is Not Aware Of Separate Frequencies, But Instead Perceives Timbre - An Overall Sound Quality.
slide20

The Purpose of Hearing

  • Scout Out Our Environment (for Predators and Food) Beyond Our Line Of Sight.
    • What is out there?!
    • Is It Moving Closer Or Further Away?!
    • Where Is It?!
slide21

How We Hear

  • What Is Out There?
    • Spectral analysis with either/both ears. (Previously explained)
slide22

How We Hear

  • What Is Out There?
    • Spectral analysis with either/both ears. (Previously explained.)
  • Is It Moving Closer Or Further Away?
    • Changes in volume with either/both ears. (Inverse Square Law.)
slide23

How We Hear

  • Where Is It?
    • Bianural Hearing: Comparing the same sound as heard by two physically separate, distinctly shaped ears:
      • Relative Loudness
      • Time Of Arrival
      • Head-Related Transfer Function
slide24

How We Hear

  • Where Is It?
    • Two Separate Perceptions of Environmental Sound
      • Localization - I can point to the direction of the sound (e.g a lion’s roar)
      • Envelopment - I am inside the sound (e.g. rain & thunder)
slide30

How We Localize Sound

What’s The Difference?

Head-Related Transfer Function

slide31

Hi Fidelity/Home Theater Audio

  • To Simulate Nature It Must Reproduce
    • Realistic Complex Acoustic Spectrum
      • Accurate Full-Range Speakers
      • High-End Electronics
    • Realistic Volume Levels/Volume Changes
      • Sufficient Power and Speaker Sensitivity
      • Accurate, Clean Micro and Macro Dynamics
    • Realistic Binaural Cues via Multiple Speakers:
      • Relative Loudness
      • Time Of Arrival
      • Head-Related Transfer Function
slide32

Hi Fidelity/Home Theater Audio

  • Monophonic Sound:
    • All sound sources sonically image at the speaker.
slide33

Hi Fidelity/Home Theater Audio

  • 2-Channel Stereophonic Sound:
    • Sound sources sonically phantom-image between and behind the speakers.
  • Can have multiple simultaneous sonic phantom images.
  • Can smoothly pan a sonic phantom image.
  • 2 Discrete Channels
slide34

Hi Fidelity/Home Theater Audio

  • Quadraphonic Sound
    • Sound sources sonically phantom-image between the front speakers, between the back speakers, but not between the side speakers.
  • 4 -> 2 Matrixed Channels and barely feasible Discrete
slide35

Hi Fidelity/Home Theater Audio

  • Matrixed 4 Channels into 2
    • 2 Channels – Lt & Rt provide:
      • Left Channel = Lt
      • Right Channel = Rt
      • Channel 3 = Lt + Rt
      • Channel 4 = Lt - Rt
    • Just 3 db Channel Isolation due to Inter-channel Bleeding.
    • Steering Logic Can Isolate Channels Further, But for Only One Phantom Image at a Time
slide36

Hi Fidelity/Home Theater Audio

  • Dolby Stereo (Theaters) Thanks, Star Wars Episode 4
    • Left/Center/Right Speakers Behind Screen + Single Surround Channel into Many Speakers for Envelopment
  • 4 -> 2 Matrixed Channels. Delayed, Frequency-Limited Surround Channel
slide37

Hi Fidelity/Home Theater Audio

  • Dolby Pro Logic (Home)
    • Left/Center/Right w. Center Above/Below the Display + Single Surround Channel into 2 Dipolar Speakers for Envelopment
  • 4 -> 2 Matrixed Channels. Delayed, Frequency-Limited Surround Channel
slide38

Hi Fidelity/Home Theater Audio

  • Digital 5.1 in Theaters
    • Left/Center/Right Speakers Behind Screen + Left Sur/Right Sur + Subwoofer
  • Discrete 5 Full-Range Channels + Discrete Subwoofer
slide39

Hi Fidelity/Home Theater Audio

  • Digital 5.1 – Home Configuration
    • Left/Center/Right w. Center Above/Below the Display + Left Sur/Right Sur + Subwoofer

-30o 0o +30o

-120o +120o

  • Discrete 5 Full-Range Channels + Discrete Subwoofer
slide40

Hi Fidelity/Home Theater Audio

  • Digital 6.1 in Theaters Thanks, Star Wars Episode 1
    • Left/Center/Right Behind Screen + Left Sur/Back Sur/ Right Sur + Subwoofer
  • 5 Channels Discrete + Subwoofer + Back Channel Matrixed
slide41

Hi Fidelity/Home Theater Audio

  • Digital 7.1 – Home Configuration
    • Left/Center/Right w. Center Above/Below the Display + Left Sur/Left Back/Right Back/Right Sur + Sub

-30o 0o +30o

-90o +90o

-150o +150o

  • Discrete 7 Full-Range Channels + Discrete Subwoofer
slide43

Digital Television

  • It’s Coming February 17, 2009. Do you know where your programs are?
digital television44
Digital Television

What Is It?

  • A Totally New Television System
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Digital Television

What was wrong with the old Analog system?

digital television46
Digital Television

What was wrong with the old Analog system?

  • 1930’s Technology
digital television47
Digital Television

What was wrong with the old Analog system?

  • 1930’s Technology
  • Black & White
digital television48
Digital Television

What was wrong with the old Analog system?

  • 1930’s Technology
  • Black & White
  • Monophonic Sound
digital television49
Digital Television

What was wrong with the old Analog system?

  • 1930’s Technology
  • Black & White
  • Monophonic Sound
  • Maximum Screen Size: 19 inches
digital television50
Digital Television

What was wrong with the old Analog system?

  • 1930’s Technology
  • Black & White
  • Monophonic Sound
  • Maximum Screen Size: 19 inches
  • Kluged Retrofits: Still not close to photographic and larger-than-life quality of movies.
digital television51
Digital Television

Why Now? Actually it started in the 1980s

digital television52
Digital Television

Why Now? Actually it started in the 1980s.

  • Japanese Developed Analogue High Definition TV & Began Marketing It in the US.
digital television53
Digital Television

Why Now? Actually it started in the 1980s.

  • Japanese Developed Analogue High Definition TV & Began Marketing It in the US.
  • Congress Feared Further Technology & Patent Drain
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Digital Television

Why Now? Actually it started in the 1980s.

  • Congress asked American companies to develop a more/better American System
    • Offered no government funding but instead enticed with opportunities for patent royalties.
    • Would conduct “fly-off” of all submitted systems.
    • 4 teams of companies entered the competition.
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Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • Broadcasters insisted on being included; i.e. the high definition system would have to fit within current licensed stations (6 MHz Bandwidth/Channel).
    • The Japanese system had required higher bandwidth cable and satellite distribution.
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Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • Broadcasters insisted on being included; i.e. the high definition system would have to fit within current licensed stations (6 MHz Bandwidth/Channel).
    • The Japanese system had required higher bandwidth cable and satellite distribution.
  • FCC conducted not one, but three flyoffs over 10 years and found no system satisfactory.
digital television57
Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • Broadcasters insisted on being included; i.e. the high definition system would have to fit within current licensed stations (6 MHz Bandwidth/Channel).
    • The Japanese system had required higher bandwidth cable and satellite distribution.
  • FCC conducted not one, but three flyoffs over 10 years and found no system satisfactory.
  • During the third flyoff, one team proposed a digital system which showed promise.
digital television58
Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • The four competing teams of companies and research institutions were about to drop out of the development: over 10 years of IR&D with no return in sight.
digital television59
Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • The four competing teams of companies and research institutions were about to drop out of the development: over 10 years of IR&D with no return in sight.
  • The FCC suggested that the four teams agree to share patent royalties and combine efforts to use the best of all proposed systems.
digital television60
Digital Television

Why Now? Then Why Did It Take So Long To Develop?

  • The four competing teams of companies and research institutions were about to drop out of the development: over 10 years of IR&D with no return in sight.
  • The FCC suggested that the four teams agree to share patent royalties and combine efforts to use the best of all proposed systems
  • This Grand Alliance completed development of the current “ATSC” system in the mid 1990s and the FCC adopted it in 1997.
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Digital Television

What Is Better About Our New “ATSC” Television System?

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Digital Television

What Is Better About Our New “ATSC” Television System?

  • Needs Fewer Channels
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Digital Television

What Is Better About Our New “ATSC” Television System?

  • Needs Fewer Channels
  • Versatile Content
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Digital Television

What Is Better About Our New “ATSC” Television System?

  • Needs Fewer Channels
  • Versatile Content
  • HDTV Options:
    • Photographic Picture
    • Wide-Screen Like Movies
    • Discrete Surround Sound
digital television65
Digital Television
  • Picture Quality
    • Much Higher Resolution: 1 or 2 million pixels versus 230,000 for analogue broadcast or 345,000 for DVD
digital television66
Digital Television
  • Picture Quality
    • Much Higher Resolution: 1 or 2 million pixels versus 230,000 for analogue broadcast or 345,000 for DVD
    • Wider Color Gamut - More Saturated Colors
digital television67
Digital Television
  • Picture Quality
    • Much Higher Resolution: 1 or 2 million pixels versus 230,000 for analogue broadcast or 345,000 for DVD
    • Wider Color Gamut - More Saturated Colors
    • Wider Color Gamut - Many More Hues
digital television68
Digital Television
  • Picture Quality
    • Much Higher Resolution: 1 or 2 million pixels versus 230,000 for analogue broadcast or 345,000 for DVD
    • Wider Color Gamut - More Saturated Colors
    • Wider Color Gamut - Many More Hues
    • Better Color Spatial Resolution - Patterned Versus Pastel Shirts
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Digital Television
  • Wide-Screen Aspect Ratio

* * * *

* * * *

* * * *

* * * *

Resolution 4 Hor. X 4 Vert. = 16 Pixels

Aspect Ratio 4:4 or 1.0 to 1.0

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Digital Television
  • “Academy” Aspect Ratio

* * * *

* * * *

* * * *

Resolution 4 Hor. X 3 Vert. = 12 Pixels

Aspect Ratio 4:3 or 1.33:1.0

Analogue TV Has Theoretical 640 Hor. X 480 Vert. = Aspect Ratio 1.33:1.0

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Digital Television
  • Wide Aspect Ratio
    • Typical Movie Aspect Ratios - 1.33:1.0 (Edison),1.66:1.0, 1.85:1.0, 2.05:1.0, 2.35:1.0
    • How can HDTV accommodate all these aspect ratios? Take the geometric mean - 1.78:1.0
    • Actual Pixel Counts
      • 1280 X 720 = ~1 Megapixel; Refreshed 60 Times/Sec.
      • 1920 X 1080 = ~2 Megapixels; Refreshed 30 Times/Sec.
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Digital Television

3. 5.1 Dolby Digital Surround

  • Left Front, Center Front, Right Front, Left Surround, Right Surround, Subwoofer
  • Also Carries Regular Stereo For TV Speakers
digital television73
Digital Television

What Happens To My Old TVs When Analogue TV Is Turned Off on Feb 17, 2009?

  • Will need a converter box
    • Satellite receiver
    • Cable Box
    • Over-The-Air Box
  • Picture will still be standard definition on old TV, and will be letterboxed to accommodate wide-screen programs (or else 1. the sides of the picture will be cut off or 2. everyone will look really thin!)
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Digital Television

The Coupon Progam

  • Nielson estimates 14.3 million US households rely on over-the-air TV. That’s 12% of the nation’s households.
  • Each household can apply for up to 2 $40. coupons to spend on ATSC digital tuner boxes for analog TVs.
  • Congress has allotted $1.5 B for the program to be administered via the National Telecommunications and Information Administration. = 33.5 Million Coupons.
  • Boxes sell for $50. - $70. 250 major retailers have been approved to sell them.
  • Boxes only have Composite or Coax connector, no S-Video or Component – only output standard definition.
  • ~ 13 million coupons distributed so far.
  • http://www.ntia.doc.gov/dtvcoupon/
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Digital Television

What do I need to know to buy a new HDTV? Must have:

  • ATSC Tuner
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Digital Television

What do I need to know to buy a new HDTV? Must have:

  • ATSC Tuner (Over The Air)
  • QAM Tuner (Basic Cable)
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Digital Television

What do I need to know to buy a new HDTV? Must have:

  • ATSC Tuner (Over The Air)
  • QAM Tuner (Basic Cable)
  • Pixel Count At Least 1280 X 720 (“720p”)
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Digital Television

What do I need to know to buy a new HDTV? Must have:

  • ATSC Tuner (Over The Air)
  • QAM Tuner (Basic Cable)
  • Pixel Count At Least 1280 X 720 (“720p”)
  • Diagonal Size = ~ 1/2 Viewing Distance
digital television79
Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
digital television80
Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
  • Cable Card
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Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
  • Cable Card
  • Pixel Count: 1920 X 1080 (“1080I” or “1080P”)
digital television82
Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
  • Cable Card
  • Pixel Count: 1920 X 1080 (“1080I” or “1080P”)
  • 120 Hz Refresh
    • Eliminates Image Persistence & Judder
digital television83
Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
  • Cable Card
  • Pixel Count: 1920 X 1080 (“1080I” or “1080P”)
  • 120 Hz Refresh
    • Eliminates Image Persistence & Judder
  • 3D Ready
digital television84
Digital Television

What do I need to know to buy a new HDTV? Nice to have:

  • HDMI Hookup (Still Has Bugs)
  • Cable Card
  • Pixel Count: 1920 X 1080 (“1080I” or “1080P”)
  • 120 Hz Refresh
    • Eliminates Image Persistence & Judder
  • 3D Ready
  • More Color Ready
    • Deep Color (10-14 bits/Primary)
    • xvYCC Extended Color (LED, Laser Illumination)
digital television85
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
digital television86
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
digital television87
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
  • Shadow Detail
digital television88
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
  • Shadow Detail
  • Instantaneous Contrast
digital television89
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
  • Shadow Detail
  • Instantaneous Contrast
  • Motion Persistence?
digital television90
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
  • Shadow Detail
  • Instantaneous Contrast
  • Motion Persistence?
  • Contouring?
digital television91
Digital Television

What Do I Need To Know To Buy A New TV? How Do I Judge Picture Performance?

  • Brightness (Red Herring - only relevant for very bright rooms)
  • Color Accuracy – Do they look natural?
  • Shadow Detail
  • Instantaneous Contrast
  • Motion Persistence?
  • Contouring?
  • Off Axis Viewing (Depends on seating).
    • Brightness Diminishes
    • Colors Change
digital television92
Digital Television

What Type Of HDTV Format Should I Buy?

  • Rear Projection - Best Value even though disappearing.
    • New models are no deeper than Flat Panels on their stands.
    • Still best for screen sizes ≥ 60”
  • Front Projection - Best to Suspend Disbelief
  • Flat Panel – Lifestyle Choice, Lifestyle Cost. Vary Greatly in Picture Quality.
digital television93
Digital Television

What Type Of HDTV Technology Should I Buy?

Alphabet Soup, But You Need to Know:

  • 3LCD Front Projectors and Rear Projection Sets
    • Screen Door Effect - Acceptable Pixel Fill
    • Mediocre Contrast - but gradually improving
    • Mediocre Blacks - but gradually improving
    • Mediocre Off Axis Viewing (Rear Projection)
    • Good Brightness
    • Brightness Ages Some, but Restores w. New Bulb
    • Bulb Life 2000 - 4000 Hours. Cost $300. - $400.
    • Cheapest Projectors and Projection Sets
digital television94
Digital Television

What Type Of HDTV Technology Should I Buy?

Alphabet Soup, But You Need to Know:

  • DLPFront Projectors and Rear Projection Sets
    • Color Wheel Can Cause Fringing - hence multispeed.
    • Extended Color Gamut with Optional 6 Primary Colors
    • Screen Door Effect - Very Good Pixel Fill
    • Good Contrast - and keeps improving
    • Good Blacks - and keeps improving
    • Mediocre Off Axis Viewing (Rear Projection)
    • Good Brightness
    • Brightness Ages Some, but Restores w. New Bulb
    • Bulb Life 2000 - 4000 Hours. Cost $300. - $400.
    • Wide Range Of Price Performance.
      • 3 DLP the Best & Costliest
digital television95
Digital Television

What Type Of HDTV Technology Should I Buy?

Alphabet Soup, But You Need to Know:

  • LCOS (D-ILA & SXRD)Front Projectors and Rear Projection Sets
    • Screen Door Effect - Very Good Pixel Fill
    • Good To Great Contrast
      • Some D-ILA is Best in Industry
    • Good To Great Blacks
    • Mediocre Off Axis Viewing (Rear Projection)
    • Good Brightness
    • Brightness Ages Some, but Restores w. New Bulb
    • Bulb Life 2000 - 4000 Hours. Cost $300. - $400.
    • Price Competitive with DLP
digital television96
Digital Television

What Type Of HDTV Technology Should I Buy?

Alphabet Soup, But You Need to Know:

  • Plasma Flat Panels
    • Digital Picture Resolution - some 1920 X 1080, many 1346 X 768, Beware 1024 X 768 (43 inch)
    • Screen Door Effect - Very Good Pixel Fill
    • Good To Great Contrast - Rivals CRT
    • Good to Great Blacks - Rivals CRT
    • Superb Off Axis Viewing - Rivals CRT
    • Good Brightness
    • Rich Colors
    • 40,000 Hour Predicted Life But Will Lose Brightness w. Age
    • Susceptible to Burn-In
    • Expensive, But Cheaper Than Flat Panel LCD for Large Sizes
digital television97
Digital Television

What Type Of HDTV Technology Should I Buy?

Alphabet Soup, But You Need to Know:

  • LCD Flat Panels
    • Digital Picture Resolution - Most 1920 X 1080, Some 1280 X 720, Beware 1080 X 1080, Many SD (Smaller)
    • Brightest Display Technology
    • Least Refined Display Technology - Digital Grain
    • Screen Door Effect - Acceptable Pixel Fill
    • Mediocre Contrast - But Improving w. Each Generation
    • Mediocre Blacks - But Improving w. Each Generation
    • Poor Off Axis Viewing - Brightness and Color Shifts
    • Wide Range of Picture Quality & Prices, but …
    • Getting Ever Cheaper To Produce - Rivals CRT in Cost for Small Screen Sizes and Is Sexier
    • Will Eventually Rule The Mass Market
digital television98
Digital Television

What Happens When I Get The Set Home? Programming Sources:

  • Over-The-Air Free: All local stations now have digital channels. Needs a good antenna.
    • During set-up your set will scan for them and store.
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Digital Television

What Happens When I Get The Set Home? Programming Sources:

  • Over-The-Air Free: All local stations now have digital channels. Needs a good antenna.
    • During set-up your set will scan for them and store.
  • Time-Warner Cable: Some local digital stations available but not NBC or WB. + Optional HD Cable Network “Tier” + HD Premium Channels Available
digital television100
Digital Television

What Happens When I Get The Set Home? Programming Sources:

  • Over-The-Air Free: All local stations now have digital channels. Needs a good antenna.
    • During set-up your set will scan for them and store.
  • Time-Warner Cable: Some local digital stations available but not NBC or WB. + Optional HD Cable Network “Tier” + HD Premium Channels Available
  • Satellite: No local digital channels available yet.
    • DirectTV: More HD Every Week As Cable Networks Convert. Rumored Reformatted to 1440 X 1080
    • Dish Network: More HD Every Week As Cable Networks Convert. Better Picture Quality. Start of 1080P PPV
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Digital Television

“Cable” Networks In HD – Already Obsolete!

  • Basic Networks:

A&E Animal Planet Discovery ESPN

ESPN2 Food Network Golf Channel HGTV

National Geog. Science Channel TBS TLC

TNT NFL

  • Premium Networks:

Big 10 Cinemax HBO Showtime Starz

  • HD Only Networks:

HDNet HDNet Movies HD News HD Theater Universal HD

  • Voom HD Only Networks (Dish Network Satellite Only):

Animania Equator Family Room Film Fest

Gallery Gameplay Kung Fu MHD

Monsters Rave Rush Treasure

Ultra World Cinema WorldSport

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Digital Television

Collecting HD Programs

  • Digital VHS
    • Use D-VHS or S-VHS Tape
    • 2 1/2 Hrs HD/Tape - 3 hours of TV Minus Commercials
    • Simple Operation via Firewire from DVR
    • Also Records/Plays Regular Tapes
    • HD Movies Available on D-Theater Tapes for 5 Years
  • Blu-Ray:
    • Different Dimensions From DVD
    • Require New Factories To Produce
    • Most Discs So Far Are Single Layer
    • 25 Gbytes/Layer
    • Starting Price: $400.
    • Disc Starting Price: $25. Most ≥$35.
    • Full Spec Players Just Now Becoming Available
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Digital Television

Collecting HD Programs

  • HD-DVD: Format War Loser
    • Discs Have Same Structure As DVDs
    • Discs & Players Are Cheaper To Produce
    • Discs Can Be Produced In Regular DVD Factories
    • Most Discs Are Dual Layer
    • 15 Gbytes/Layer (but most X 2)
    • More Interaction Capability; Fully Ramped Up from Start
    • Consistent, Intuitive Disc Menu System
    • Some Dual Discs: SD & HD on Same Disc
    • Player Prices Start $150.