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HD vs. SD -- High / Standard Definition Comparison Video & Explanation
HD vs. SD -- High / Standard Definition Comparison Video & Explanation
Published: 2010/04/28
Channel: Jon
Standard Definition vs. High Definiton 1:1 Test HD 720p
Standard Definition vs. High Definiton 1:1 Test HD 720p
Published: 2009/11/02
Channel: THX8KanalMaster
Displaying HDTV on a standard definition TV
Displaying HDTV on a standard definition TV
Published: 2010/07/05
Channel: VWestlife
High Definition Television (HDTV) : Converting Standard Definition DVDs
High Definition Television (HDTV) : Converting Standard Definition DVDs
Published: 2008/02/08
Channel: expertvillage
High Definition Television (HDTV) : Difference Between High & Standard Definition Video
High Definition Television (HDTV) : Difference Between High & Standard Definition Video
Published: 2008/02/08
Channel: expertvillage
What is STANDARD-DEFINITION TELEVISION? What does STANDARD-DEFINITION TELEVISION mean?
What is STANDARD-DEFINITION TELEVISION? What does STANDARD-DEFINITION TELEVISION mean?
Published: 2017/08/07
Channel: The Audiopedia
Instructional Video: How to Install for Standard-definition Television (SD TV)
Instructional Video: How to Install for Standard-definition Television (SD TV)
Published: 2015/08/20
Channel: Grand Videoke
Standard Definition vs High Definition HDTV Side by Side on Hannspree LED HDTV
Standard Definition vs High Definition HDTV Side by Side on Hannspree LED HDTV
Published: 2012/06/16
Channel: Poolarity - Life Hacks
High Definition Television (HDTV) : Connecting Analog Cables to an HDTV
High Definition Television (HDTV) : Connecting Analog Cables to an HDTV
Published: 2008/02/08
Channel: expertvillage
Technology in 10: Standard Definition vs. High Definition (Season 1- Episode 2)
Technology in 10: Standard Definition vs. High Definition (Season 1- Episode 2)
Published: 2014/01/14
Channel: Mr. Ford's Class
Standard-definition television
Standard-definition television
Published: 2016/01/29
Channel: WikiAudio
Instructional Video: How to Install for Standard Definition Television (SD TV)
Instructional Video: How to Install for Standard Definition Television (SD TV)
Published: 2015/08/20
Channel: Grand Videoke
Comparison of Full HD , HD ready and standard definition
Comparison of Full HD , HD ready and standard definition
Published: 2013/04/18
Channel: BestYTvideos
07 HD or SD
07 HD or SD
Published: 2013/12/11
Channel: Vineyard Nordic
HD vs SD Comparison
HD vs SD Comparison
Published: 2015/02/21
Channel: John Who
576i Standard-definition Television
576i Standard-definition Television
Published: 2014/03/13
Channel: Abdul Rahman Sidahmed
Difference between hd and sd channels .
Difference between hd and sd channels .
Published: 2015/02/25
Channel: MOK
4K UltraHD to Standard Definition (Resolution Comparison)
4K UltraHD to Standard Definition (Resolution Comparison)
Published: 2014/10/22
Channel: VJ Coach
How to use a Xbox One/PS4 on a SDTV/Standard Definition TV.
How to use a Xbox One/PS4 on a SDTV/Standard Definition TV.
Published: 2013/12/25
Channel: /home/gligar13
Watching SD TV & picture settings update on SAMSUNG UE55KU6020 55 Inch Series 6 4K Smart LED TV
Watching SD TV & picture settings update on SAMSUNG UE55KU6020 55 Inch Series 6 4K Smart LED TV
Published: 2017/01/25
Channel: EastAngliaUK
What Is The Resolution Of Standard Definition PAL Television And Video
What Is The Resolution Of Standard Definition PAL Television And Video
Published: 2017/07/24
Channel: smile sparky
How to use PS4/xbox one on old TV
How to use PS4/xbox one on old TV's!
Published: 2015/12/03
Channel: BOBdotEXE
High Definition Television (HDTV) : Converting Standard Definition DVDs
High Definition Television (HDTV) : Converting Standard Definition DVDs
Published: 2011/03/07
Channel: chrisjdowney
*REVIEW* SDTV(standard definition television)
*REVIEW* SDTV(standard definition television)
Published: 2012/04/05
Channel: lasgengameplay123
High Definition vs. Standard Definition (HDxSD)
High Definition vs. Standard Definition (HDxSD)
Published: 2014/03/13
Channel: Edot Holdings
What 144p, 240p, 360p, 480p looks like on a 4K TV or Monitor (4K)
What 144p, 240p, 360p, 480p looks like on a 4K TV or Monitor (4K)
Published: 2015/09/10
Channel: 4Kpodcast
The Difference Between Standard Definition & HD on iPad Movies : iPad Tips
The Difference Between Standard Definition & HD on iPad Movies : iPad Tips
Published: 2012/07/05
Channel: eHowTech
SD vs HD picture - explained through DishTV Set Top Box
SD vs HD picture - explained through DishTV Set Top Box
Published: 2017/03/06
Channel: SHAAN
High Definition Television (HDTV) : Converting Standard Definition DVDs
High Definition Television (HDTV) : Converting Standard Definition DVDs
Published: 2011/03/07
Channel: janemengels
Does TV Resolution Matter?
Does TV Resolution Matter?
Published: 2016/02/23
Channel: BrainStuff - HowStuffWorks
Widescreen Standard Definition TV Hauppauge HD PVR Test
Widescreen Standard Definition TV Hauppauge HD PVR Test
Published: 2010/10/03
Channel: Formaz259
Standard VS. High Definition - NVIDIA - FULL 1080P Resolution - YouTube Test
Standard VS. High Definition - NVIDIA - FULL 1080P Resolution - YouTube Test
Published: 2009/12/05
Channel: CharlietoKind
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What is SD, HD and 4k technology? Which one tv you can buy? HD Vs UHD Vs 4K
Published: 2016/12/05
Channel: Seven Sense Ads & Technology
How to setup a HD PVR to a standard definition tv(alternative way)
How to setup a HD PVR to a standard definition tv(alternative way)
Published: 2011/03/13
Channel: edog2004
Benefits of HD TV - Why High Definition television?
Benefits of HD TV - Why High Definition television?
Published: 2010/03/11
Channel: consumerchoices
TataSky + HD DTH - How To Connect Standard Definition Television(SDTV)
TataSky + HD DTH - How To Connect Standard Definition Television(SDTV)
Published: 2015/02/14
Channel: showhow2
What is resolution | 1080p 4K SD HD and UHD explained | S 3 Ep 16
What is resolution | 1080p 4K SD HD and UHD explained | S 3 Ep 16
Published: 2016/07/18
Channel: Film World
Standard Definition Vs High Definition
Standard Definition Vs High Definition
Published: 2017/01/19
Channel: alivestudiostube
Standard Definition Vs. High Definition Comparison + Pictures
Standard Definition Vs. High Definition Comparison + Pictures
Published: 2009/12/10
Channel: xBeyond Beliefx
COAT HANGER TV ANTENNA VS THE ULTIMATE TV ANTENNA
COAT HANGER TV ANTENNA VS THE ULTIMATE TV ANTENNA
Published: 2016/07/22
Channel: Danny S Hodges
Elmininating letterbox black bars on a standard definition television
Elmininating letterbox black bars on a standard definition television
Published: 2016/02/17
Channel: Tim Poliniak
hd gaming on sd tv
hd gaming on sd tv
Published: 2014/05/16
Channel: Unoshin
Movistar TV HD - Diferencias entre SD y HD
Movistar TV HD - Diferencias entre SD y HD
Published: 2012/12/28
Channel: CanalMovistarPeru
How to Show HD or SD channels in your DIRECTV Guide
How to Show HD or SD channels in your DIRECTV Guide
Published: 2015/02/20
Channel: Solid Signal
SD to 4K Test Pattern Generation using the Omnitek Ultra 4K Tool Box
SD to 4K Test Pattern Generation using the Omnitek Ultra 4K Tool Box
Published: 2015/04/23
Channel: OmniTek
20th Century Fox Television endcap (2009-2010) (Standard-definition television variant)
20th Century Fox Television endcap (2009-2010) (Standard-definition television variant)
Published: 2017/09/02
Channel: Joseph Mama
How to program Standard Definition SD DirecTV remote to TV? H24
How to program Standard Definition SD DirecTV remote to TV? H24
Published: 2015/08/28
Channel: sat utah
[Adult Swim] Kill Your Standard Definition Television (Full Song)
[Adult Swim] Kill Your Standard Definition Television (Full Song)
Published: 2010/10/22
Channel: Deshi Blacksheep
Multi Room TV Kit (Standard Definition)
Multi Room TV Kit (Standard Definition)
Published: 2011/04/19
Channel: tvtradedave
Possible Rope in Standard Definition
Possible Rope in Standard Definition
Published: 2012/12/30
Channel: TIGHARchannel
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
  (Redirected from SDTV)
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SDTV resolution by nation; due to historical reasons, different countries use either 480i or 576i as the standard-definition picture format.

Standard-definition television (SDTV or SD) is a television system that uses a resolution that is not considered to be either high-definition television (720p, 1080i, 1080p, 1440p, 4K UHDTV, and 8K UHD) or enhanced-definition television (EDTV 480p). The two common SDTV signal types are 576i, with 576 interlaced lines of resolution, derived from the European-developed PAL and SECAM systems; and 480i based on the American National Television System Committee NTSC system. SDTV and high definition television (HDTV) are the two categories of display formats for digital television (DTV) transmissions, which are becoming the standard.

In North America, digital SDTV is broadcast in the same 4:3 aspect ratio as NTSC signals with widescreen content being center cut.[1] However, in other parts of the world that used the PAL or SECAM color systems, standard-definition television is now usually shown with a 16:9 aspect ratio, with the transition occurring between the mid-1990s and mid-2000s. Older programs with a 4:3 aspect ratio are broadcast with a flag that switches the display to 4:3 (some broadcasters prefer to reduce the horizontal resolution by anamorphically scaling the video into a pillarbox).

Standards that support digital SDTV broadcast include DVB, ATSC, and ISDB. The last two were originally developed for HDTV, but are more often used for their ability to deliver multiple SD video and audio streams via multiplexing, than for using the entire bitstream for one HD channel.[clarification needed]

For SMPTE 259M-C compliance, a SDTV broadcast image is scaled to 720 pixels wide (with only 704 center pixels containing the image with 16 pixels reserved for horizontal blanking, a number of broadcasters fill the whole 720 frame) for every 480 NTSC (or 576 PAL) lines of the image with the amount of non-proportional line scaling dependent on either the display or pixel aspect ratio. The display ratio for broadcast widescreen is commonly 16:9 (with a pixel ratio of 40:33 for anamorphic), the display ratio for a traditional or letterboxed broadcast is 4:3 (with a pixel aspect ratio of 10:11).

An SDTV image outside the constraints of the SMPTE standards requires no non-proportional scaling with 640 pixels (as defined by the adopted IBM VGA standard) for every line of the image. The display and pixel aspect ratio is generally not required with the line height defining the aspect. For widescreen 16:9, 360 lines define a widescreen image and for traditional 4:3, 480 lines define an image.

SDTV refresh rates can be 24, 25, 30, 50 or 60 frames per second with a possible rate multiplier of 1000/1001 for NTSC timing accuracy. 50 and 60 rates are generally frame doubled versions of 25 and 30 rates for jitter issues when using non-interlaced lines.

Digital SDTV in 4:3 aspect ratio has the same appearance as regular analog TV (NTSC, PAL, SECAM) without the ghosting, snowy images and white noise. However, if the reception has interference or is poor, where the error correction can not compensate one will encounter various other artifacts such as image freezing, stuttering or dropouts from missing intra-frames or blockiness from missing macroblocks. The audio encoding is the last to suffer loss due to the lower bandwidth requirements.

Pixel aspect ratio[edit]

Television signals are transmitted in digitally encoded form, and the lines are scaled to fit SMPTE SDI bandwidth requirements, as opposed to unrestricted uses such as when lines are rendered or overlaid to a modern computer monitor and modern SMPTE implementations of HDTV. The table below summarizes pixel aspect ratios for the scaling of various kinds of SDTV video lines. Note that the actual image (be it 4:3 or 16:9) is always contained in the center 704 horizontal pixels of the digital frame, regardless of how many horizontal pixels (704 or 720) are used. In case of digital video line having 720 horizontal pixels, only the center 704 pixels contain actual 4:3 or 16:9 image, and the 8 pixel wide stripes from either side are called nominal analogue blanking for horizontal blanking and should be discarded before displaying the image. Nominal analogue blanking should not be confused with overscan, as overscan areas are part of the actual 4:3 or 16:9 image.

Video format Display aspect ratio (DAR) Resolution Pixel aspect ratio (PAR) After horizontal scaling
576i 4:3 704×576
(horizontal blanking cropped)
12:11 768×576
720×576 (full frame) 786×576
576i 16:9 704×576
(horizontal blanking cropped)
16:11 1024×576
720×576 (full frame) 1048×576
480i 4:3 704×480
(horizontal blanking cropped)
10:11 640×480
720×480 (full frame) 654×480
480i 16:9 704×480
(horizontal blanking cropped)
40:33 854×480
720×480 (full frame) 872×480

The pixel aspect ratio is always the same for corresponding 720 and 704 pixel resolutions because the center part of a 720 pixels wide image is equal to the corresponding 704 pixels wide image.

See also[edit]

References[edit]

External links[edit]

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