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All About HDTVCass Lewart © 201011
All About HDTVTCF April 2010
All About HDTVCass Lewart © 20092
The Pictures Look Great
50” Vizio
All About HDTVCass Lewart © 200933
All About HDTV - Outline
Digital TV (DT) and High Definition (HDTV) Frequency Allocation What are Broadcasters Doing Where are the Signals Coming From Plasma, LCD and DLP Displays How to Hook Up HDTV to Your System HD Recording Consumer Guide New Developments
All About HDTVCass Lewart © 200944
Analog vs. Digital TV (DT)
OTA Analog transmissions ceased in 2009 after over 50 years. DT offers better picture quality – no “snow”, no geometric distortion, no convergence problems
Each pixel separately generated Stereo and surround sound (5.1) built-in MPEG-2 compresses 1 Gb/s video stream One 6 MHz Channel can carry 20 Mb/sec or
several DT (HDTV and SDTV) sub channels and other data (8-VSB and QAM)
All About HDTVCass Lewart © 200955
Digital TV and HDTV (cont.)
DT Formats – 480i, 576i, 720p, 1080i, 1080p (1080p Blu-Ray only)
Native HDTV Formats - 720p or 1080i, up or down conversion is required
Aspect Ratios – 4:3, 16:9 – black stripes, missing foreheads or 300-lb bodies
On-Screen Daily Schedules
All About HDTVCass Lewart © 20096
2010 TV Receivers
Sets with HD display, NTSC/ATSC and QAM tuners with or without cable cards (most common)
Sets with SD display (LCD or CRT) and NTSC/ATSC tuner (least expensive)
All About HDTVCass Lewart © 200977
Frequency Allocation
Old Assignments: VHF (Ch. 2-13) and UHF (Ch. 14-68)
New Assignments: Upper VHF, lower UHF (Ch. 7-53)
Government Will Auction the Vacated Channels for $$ Billions, issued rebate coupons for converter boxes
All About HDTVCass Lewart © 200988
What Are Broadcasters Doing?
Broadcasters take advantage of uninformed public
Saving on Quality for Profits – more channels, less HD
Few Broadcasters provide a consistent true HD Signal
Cable and satellite providers degrade the HD signal by further compressing it
Over-the-air still the best – not publicized and hushed up by cable providers and retailers
All About HDTVCass Lewart © 20099
Transmission and Modulation
NTSC/ATSC/QAM Tuners
Video Stream1 Gbit/sec
+MPEG-2
20 Mbits/sec
QAM (Cable) 6 MHz
8-VSB (OTA)6 MHz
All About HDTVCass Lewart © 200910
Digital Transmission
6 MHz Channel
All About HDTVCass Lewart © 20091111
Are You Watching HDTV?
Sleeping in the Garage Doesn't Make You a Car
Nearly half of the 24 million households with HDTVs don't actually watch high-definition programs
HDTV Material Doesn't Grow on Trees
All About HDTVCass Lewart © 20091212
Where Are the Digital Signals Coming from?
Digital Cable Satellite (Dish Network) Over the Air – An old antenna, even
rabbit ears will often do Blu-ray DVDs and other new formats
All About HDTVCass Lewart © 200913
Over the Air (OTA) Transmission
Free and of excellent quality No such thing as an HD Antenna Depending on location – Rabbit ears, a
good antenna on the roof or in attic An inexpensive RF amplifier may help For available channels, signal strength
and directions: www.antennaweb.org
All About HDTVCass Lewart © 20091414
Plasma, LCD and DLP Displays
Plasma – Generates its own light, vivid colors, best viewing angle, but subject to burn-in, ambient light a problem (glare, reflections), may cause problems with remote controls
LCD – Backlit, (LED or Fluorescent) good pastel colors, poor blacks, low power consumption, low weight, good in lighted areas, 42” or less
DLP – Reflected light (Rear projection), bright colors, relatively expensive, fragile, 50” and up,
www.howstuffworks.com/lcd2.htm
All About HDTVCass Lewart © 20091515
Plasma Display
Panel Cross Section
All About HDTVCass Lewart © 20091616
Plasma Display (cont.)
Cell arrangement
All About HDTVCass Lewart © 20091717
LCD Display
Polarization
All About HDTVCass Lewart © 20091818
LCD Display (cont.)
More Details
All About HDTVCass Lewart © 20091919
DLP (Projection) Display
How it works
How to Hook Up HDTV to Your A/V System
Typical Input/Output Panel in Back of the TV
20
All About HDTVCass Lewart © 20092121
How to Hook Up HDTV to Your System (A/V Components)
Over-the-air and cable combination Analog vs. digital cable (cable cards, boxes) Use of additional tuners (VCR, ATSC) Analog and digital audio to your HiFi Use with laptop as monitor DVD Player Games, computer and other components
All About HDTVCass Lewart © 20092222
How to Hook Up HDTV to Your System (Inputs and Outputs)
Varies between Manufacturers and Models Composite (3 RCA cables) – OK quality Component (5 RCA cables) – Excellent quality HDMI – Excellent quality but DRM restrictions S-Video + audio – Good quality RGB (15 pins) + audio Analog Audio (Stereo) Digital Audio (5.1)
All About HDTVCass Lewart © 20092323
How to Hook Up HDTV to Your System (Cable Types)
HDMI, RCA, S-Video, RGB
All About HDTVCass Lewart © 20092424
How I Hooked Up HDTV to Your System (OTA and Analog Cable)
Combining Over-the-air with analog cable
VCR
HDTV
Antenna
Cable AV1
DTV/TV
All About HDTVCass Lewart © 20092525
Recording of HD/SD Programs
Lack of video outputs on most HDTV sets makes recording difficult (DRM raises its ugly head)
Recording to PC hard drive with external tuner Regular VCR if analog output available from
HDTV or digital cable box TiVo recording to hard drive DVRs with built-in ATSC/QAM tuners and DVD
recording. 2 hours ur less, SD only
All About HDTVCass Lewart © 200926
Pinnacle PCTV HD Stick
All About HDTVCass Lewart © 200927
HD Picture on PC Screen
All About HDTVCass Lewart © 200928
2010 HD/SD Programming
Networks now have additional channels Plenty of weather, cooking, children, and
audio only channels News, sports, specials and some shows in
HD PBS HD channel with high quality
documentaries, cultural and science programs.
All About HDTVCass Lewart © 200929
Government Coupon Program
Analog OTA transmission ceased on June 12, 2009 with a whimper, not with a bang. There were no street protests.
1-2 $40 Rebate coupons per household were issued.
ATSC OTA Digital to analog converters gave new life to analog TVs and VCRs
D/A Converter Hook Up
30
All About HDTVCass Lewart © 20093131
Consumer Guide
Fit Size to Your Viewing Area Built-in ATSC/QAM tuner or HD-Ready Plasma, LCD or DLP Availability of Inputs and Outputs Price, warranties, repair cost Ask questions on alt.tv.tech.hdtv and
check http://www.avsforum.com
New Developments
3 D Displays LED/LCD OLED Displays NET TV - Internet Enabled