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แผนกพั�ฒนาบุคลากรและสน�บุสนนฝ่�ายวิ�ศวิกรรม วิางแผนและเคร�อข่�าย
ควิามร��เก !ยวิก�บุเทคโนโลย ดิ�จิ�ตอล
04/15/2023
Engineering Planning & Network Department
2
•Analog Television Vs Digital Television•Contents Creation Technology Trend•The Convergence of Technology•Latest Development and Roadmap of DTT•Q&A
Contents
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Analog TV
ผ��ผล�ตรายการ สถาน โทรท�ศน( (Broadcaster) ผ��ชม
Digital
TV
ผ��ผล�ตรายการ
Service
Provider
Network
Provider
Facility
Provider
Application
Service Provide
r
ผ��ชม
Value Chain
Analog Television Value Chain
Digital Television Value Chain
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คณภาพัข่องส�ญญาณ
ควิามคมช�ดิข่-.นอย��ก�บุควิามแรงข่องส�ญญาณ
ม 2 ระดิ�บุ ค�อ ต�ดิ (ช�ดิ) ก�บุ ดิ�บุ (จิอดิ/า)
คณภาพัข่องภาพัรองร�บุควิามคมช�ดิมาตรฐาน (SD) 576i
รองร�บุควิามคมช�ดิส�ง (HD) 1080p
คณภาพัข่องเส ยงรองร�บุระบุบุเส ยงสเตอร�โอ 2 ช�องเส ยง
รองร�บุระบุบุเส ยงรอบุท�ศทาง 5.1ช�องเส ยง
ช�องรายการใน 1 ควิามถ !
1 ช�องรายการ รองร�บุ 4 HD หร�อ 12 SD
การให�บุร�การประยกต(
ไม�รองร�บุ รองร�บุเทคโนโลย ส�!อผสม การส�งข่�อม�ล ฯลฯ
โทรท�ศน(ระบุบุแอนะล6อก
โทรท�ศน(ระบุบุดิ�จิ�ตอล
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Engineering Planning & Network Department
ระบุบุดิ�จิ�ตอลระบุบุแอนะล6อก
ระบุบุแอนะล6อก VS ระบุบุดิ�จิ�ตอล (คณภาพัข่องส�ญญาณ)
04/15/2023
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Engineering Planning & Network Department
ระบุบุดิ�จิ�ตอลระบุบุแอนะล6อก
ระบุบุแอนะล6อก VS ระบุบุดิ�จิ�ตอล (คณภาพัข่องภาพั)
04/15/2023
7
Engineering Planning & Network Department
ระบุบุดิ�จิ�ตอลระบุบุแอนะล6อก
ระบุบุแอนะล6อก VS ระบุบุดิ�จิ�ตอล (คณภาพัข่องเส ยง)
04/15/2023
8
Engineering Planning & Network Department
ระบุบุดิ�จิ�ตอลระบุบุแอนะล6อก
ระบุบุแอนะล6อก VS ระบุบุดิ�จิ�ตอล (จิ/านวินช�องรายการ)
04/15/2023
9
Engineering Planning & Network Department
ระบุบุดิ�จิ�ตอลระบุบุแอนะล6อก
ระบุบุแอนะล6อก VS ระบุบุดิ�จิ�ตอล (บุร�การแบุบุประยกต()
04/15/2023
Engineering Planning & Network Department
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LCD TV
An LCD screen is composed of two parts:1. the actual liquid crystal display2. a light source at the back of the screen (called backlight)
A light diffuser is placed between the backlight and the LCD screen to make the source of light uniform across the screen.
CCFL (cold-cathode fluorescent lamp) backlit LCD screenBacklit LCD screen
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•An LED screen is actually an LCD screen, but instead of having a normal CCFL backlight, it uses light-emitting diodes (LEDs) as a source of light behind the screen.•An LED is more energy efficient and a lot smaller than a CCFL, enabling a thinner television screen.•Marketing made a lot of fuss about LED TVs, but it is only the backlight that changed, so there is actually no picture quality improvement over a normal LCD screen.
LED TV
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LED TV Plasma TVThickness LED edge backlit LCD TVs are thinner than
CCFL LCD TVs. Often less than 1 inch.Minimum 1.2 inches
Power consumption
LED-lit LCD TVs consume less power around 70% compared to plasma TVs.
Consumes slightly more power than an LCD TV. Modern plasma displays receive high Energy Star (US) ratings.
Screen size Up to 90 inches 32 inches and aboveBurn-in Burn-in is very rare Burn-in is rare on newer plasma TVs with anti-
burn-in features, but was somewhat common on old plasma TVs.
Life span Around 100,000 hours Around 20, 000 – 60,000 hoursCost $100 (small size and very low end) - $25,000 Cheaper than LED-lit TVsViewing angle
The brightness and color on LCD TVs shift noticeably over the screen and depending on viewing angle
Plasma TVs look the same from almost any angle
LED TV VS Plasma TV
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LED TV Plasma TVContrast Ratio Worse than plasma TVs. All LCDs produce
brighter whites, but brighter blacks as well. Better than LCD TVs.
Weight Lighter compared to plasma TV Heavier compared to LED-lit LCD TVBrightness and color
Brighter than plasma or OLED Not as bright as LED-lit LCD.
Screen Refresh Rate
60-240 Hz, but LCD response times create blur and ghosting which limits true refresh rates to 20-100 Hz.
Up to 600 Hz. Plasma TVs handle rapid movements in video about as well as old CRT TVs.
Energy Use Less for dynamically backlit LCD TVs, about as much for statically backlit ones.
Generally more.
Manufacturers All TV manufacturing companies Panasonic, LG, SamsungRunning Temperature
Dynamically lit LCD TVs dissipate less heat compared to plasma TVs, LED-lit LCD TVs dissipate less heat than even other LCD TVs.
Plasma TVs generally dissipate more heat than LCD TVs
LED TV VS Plasma TV
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LED TV Plasma TV
Picture Quality
Average Viewing angle 37o 70o
Average Black Luminance 0.15 cd/m2 0.05 cd/m2
Average White Luminance 250 cd/m2 100 cd/m2
Colors Good GoodMotion Blur Great Best
CostAverage Cost for 40" 645$ 450$Longevity Best GoodYearly Electricity Cost for 40" $8 $11
Form Average Thickness 1.8" 2.5"Average Weight for 40" 27 lb 42 lb
MarketYear introduced to public 2008 1997Sales trend Up Slightly UpRange of sizes All Between 40" and 65"
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•Analog Television Vs Digital Television•Contents Creation Technology Trend•The Convergence of Technology•Latest Development and Roadmap of DTT•Q&A
Contents
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Contents Creation Technology TrendResoluti
on(2k, 4k,
8k) Color Gamut
(R.709, BT 2020)
Quantization
(8 bit, 10
bit, 12 bit)
Frame Rate
(25/30p,50/60i,
50/60p,100/120p)
Dynamic Range
(Contrast)
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Definition Short Name
Scan Type
Resolution Pixels
Standard Definition
480i Interlaced
720 x 480 345,600
576i Interlaced
720 x 576 414,720
Enhanced Definition
480p Progressive
720 x 480 345,600
576p Progressive
720 x 576 414,720
High Definition
720p Progressive
1280 x 720 921,600
1080i Interlaced
1920 x 1080 2,073,600
1080p Progressive
1920 x 1080 2,073,600
Ultra-High Definition
4k Progressive
3840 x 2160 8,294,400
8k Progressive
7680 x 4320 33,177,600
Resolution
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ResolutionUHD2 7680 x 4320 (8k)
UHD1 3840 x 2160 (4k)
HD 1920 x 1080HD 1280 x 720
SD 720 x 576
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HDTV Broadcast
Format(Uncompress
ed)
Net-Pixel Bitrate
(Uncompressed)
Comment
1280 x 720p/50
0.53 Gbit/s
1440 x 1080i/25
0.44 Gbit/s
Many 1080i/25 broadcasts use line-sub-sampling to reduce bit-rate
1920 x 1080i/25
0.59 Gbit/s
1920 x 1080p/50
1.20 Gbit/sToday, no broadcasts are available in 1080p/50
Net-Pixel Bit-rate of HDTV Broadcast Standards
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QuantizationPixel No. of Bit No. of Color
8 bit 256 colors
10 bit 1,024 colors
12 bit 4,096 colors
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Dynamic Range (Contrast)
LCD1,000:1
CRT40,000:1
OLED1,000,000:1
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•Analog Television Vs Digital Television•Contents Creation Technology Trend•The Convergence of Technology•Latest Development and Roadmap of DTT•Q&A
Contents
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•This mode supports a wide range of services including ▫Program Guide ▫News, Sport, Weather information ▫Enhanced TV services ▫Interactive Advertising ▫Emergency Warning ▫Education, Health ▫E-government ▫Games
Broadcast-Only Services
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•Some broadcast services require a simple return channel:▫Interactive Advertising▫Pay Per View (Movie, Sport)▫Enhanced TV - voting▫Shopping▫Betting
Broadcast Service with Return Channel
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•In markets where there is a mix a broadband and broadcast only households the same HbbTV service can address efficiently both environments▫Example of a Program Guide
Broadcast-Broadband Services
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•Fast Internet gives access to all types of HbbTV On Demand Video services▫VOD▫Catch up / Replay▫Start Over
Push VoD
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Hybridcast: Advanced Hybrid TV services in Japan•Program-independent services▫Wide range EPG▫Scroll news▫Weather, Sports, Business information, Cooking▫VOD (Archives)•Program-related services▫Quiz-show, Educational, News▫Key word connect
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•Start over services were provided during Sochi Olympic Winter Games from 7-24 Feb. 2014 daily.
Start Over Services
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•Analog Television Vs Digital Television•Contents Creation Technology Trend•The Convergence of Technology•Latest Development and Roadmap of DTT•Q&A
Contents
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•History of digital video coding standards▫1993: MPEG-2 (digital broadcast TV)▫2003: H.264 (IPTV, HDTV)▫2013: H.265 (OTT, UHDTV, 3DTV)
Performance for Video Coding
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Category UHD-1 Phase 1 UHD-1 Phase 2 UHD-2
Deployment 2015 2018 2020
Resolution 3840 x 2160 3840 x 2160 7680 x 4320
Frame Rate P50, p60 P100, p120 P100, p120
Dynamic Range HDR Prefer HDR Mandatory HDR Mandatory
Color Space Rec.709 Rec.709 or Rec.2020 Rec.2020
Color Sampling 4:2:0 4:2:0 4:2:0, 4:2:2, 4:4:4
Bit Depth 10 bit 10, 12 bit 10, 12, 14 bit
Video Encoding HEVC Main 10 HEVC Main 10 HEVC Main 10
Audio Format 5.1 Beyond 5.1 Objected Base
Audio Codec Open TBD Next Generation Audio Codec
Viewing Angle 66o 66o 100o
Viewing Distance 1.5 times of the picture height 1.5 times of the picture height 0.75 times of the picture height
UHD Standard Roadmap
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Japan UHDTV Roadmap
2013Set-up for 4k/8k test
20144k Test Broadcasting
20168k Test Broadcasting
20204k/8k Broadcasting on Commercial TV Sets
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