To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

From Wikipedia, the free encyclopedia

DVB-SH ("Digital Video Broadcasting - Satellite services to Handhelds") is a physical layer standard for delivering IP based media content and data to handheld terminals such as mobile phones or PDAs, based on a hybrid satellite/terrestrial downlink and for example a GPRS uplink. The DVB Project published the DVB-SH standard in February 2007.[1]

The DVB-SH system was designed for frequencies below 3 GHz, supporting UHF band, L Band or S-band. It complements and improves the existing DVB-H physical layer standard. Like its sister specification (DVB-H), it is based on DVB IP Datacast (IPDC) delivery, electronic service guides and service purchase and protection standards.

DVB-SH specifies two operational modes:

  • SH-A: specifies the use of COFDM modulation on both satellite and terrestrial links with the possibility of running both links in SFN mode.
  • SH-B: uses Time-Division Multiplexing (TDM) on the satellite link and COFDM on the terrestrial link.

YouTube Encyclopedic

  • 1/4
    Views:
    14 035
    66 268
    10 738
    24 987 526
  • ✪ Vu+ Zero 4K Linux Enigma2 ● مراجعة بالعربي لجهاز ( الفيو بلس ) شاهد الجودة الكورية
  • ✪ TV Antenna Booster | Scam or Real Deal?
  • ✪ Check Out This Awesome Magnifier Feature for Your iPhone!
  • ✪ ZEITGEIST: MOVING FORWARD | OFFICIAL RELEASE | 2011

Transcription

Contents

Comparison with DVB-H

DVB-SH supported spectrum
DVB-SH supported spectrum

The DVB-SH incorporates a number of enhancements when compared to DVB-H:

  • More alternative coding rates are available
  • The omission of the 64QAM modulation scheme
  • The inclusion of support for 1.7 MHz bandwidth and 1k FFT
  • FEC using Turbo coding
  • Improved time interleaving
  • Support for antenna diversity in terminals

Recently, results from BMCO forum[citation needed] (Alcatel April 2008) shows a radio improvement of at least 5.5 dB on signal requirements between DVB-H and DVB-SH in the UHF frequencies. The improvements to signal requirements translates to better in-building penetration, better in-car coverage and extension of outdoor coverage. DVB-SH chipsets are being developed now by DiBcom and NXP Semiconductors, and are expected to be available in beginning of 2008. Initial specifications show that the chipsets supports both UHF and S-Band and are compatible with DVB-H.

DiBcom has announced a DVB-SH chip with availability in 2008 Q3. Dibcom DVB-SH 2008 Q3. The chip "has dual RF tuners supporting VHF, UHF, L-Band and S-Band frequencies".

Project organization

French Agence de l'innovation industrielle is now financing this effort through TVMSL, a project led by Alcatel-Lucent that plans to develop a DVB-SH standard suitable for hybrid satellite and terrestrial transmission. Other partners involved in TVMSL are Sagem Wireless, Alenia, RFS, Philips, DiBcom, TeamCast, UDcast, CNRS, INRIA, CEA-LETI.[2]

Satellites

ICO, one of the biggest satellite operators in the United States, in 2007 announced a nationwide deployment of an hybrid satellite/terrestrial network in DVB-SH with Alcatel-Lucent[3] and Expway.[4] ICO G1 satellite carrying DVB-SH technology on board was launched on April 14, 2008. It is the world's first DVB-SH satellite in orbit.

Eutelsat W2A satellite carrying a Solaris Mobile (a Eutelsat and SES joint venture, now EchoStar Mobile) DVB-SH S band payload was launched on 3 April 2009. It will cover Western Europe.[5][6][7] S-band payload was scheduled to enter into service in May 2009 but this not occurred due to an anomaly currently being investigated.[8] On 1 July 2009, Solaris Mobile filed the insurance claim. The technical findings indicate that the company should be able to offer some, but not all of the services it was planning to offer.[9]

Inmarsat's S band satellite programme, called EuropaSat, will deliver mobile multimedia broadcast, mobile two-way broadband telecommunications and next-generation MSS services across all member states of the European Union and as far east as Moscow and Ankara by means of a hybrid satellite/terrestrial network. It will be built by Thales Alenia Space and launched in early 2011 launched by ILS.[10]

Trials

DVB-H/SH trials are now underway in many cities and countries: Ireland,[11] United Kingdom,[12] Malaysia, Singapore,[13] Helsinki, Berlin, Cambridge, Pittsburgh, Paris, Tehran, Madrid, Sydney,[14] South Africa, Taiwan,[15] The Hague, Brussels, Bern, Vienna, New Zealand,[16] Philippines, Copenhagen, Budapest, Erlangen,[17] Sri Lanka, Roeselare, and India.

DVB-SH in S-band is seen as an alternative in Europe. Recent field trials and studies showed better performance in radio than DVB-H standard that would lead to much cheaper costs for network deployments.[citation needed]

In France again, SFR and Alcatel-Lucent teamed up to deploy a DVB-SH trial. The results confirmed the theorical assumptions on the superiority of the DVB-SH to DVB-H, being the natural evolution of this legacy one.[18]

In Italy, 3 Italia, RAI and Alcatel-Lucent joined forces for the first DVB-SH trial in Italy.[19]

In United States, Dish Network and Alcatel-Lucent joined forces for the first DVB-SH trial in US.[20][citation needed]

See also

References

  1. ^ dvb.org: DVB approves DVB-SH specification Archived 2008-03-02 at the Wayback Machine
  2. ^ Alcatel Unlimited mobile TV Archived 2009-01-06 at the Wayback Machine "Archived copy" (PDF). Archived from the original (PDF) on 2007-01-26. Retrieved 2008-02-26.CS1 maint: Archived copy as title (link) "Archived copy". Archived from the original on 2008-02-20. Retrieved 2008-02-26.CS1 maint: Archived copy as title (link) "Archived copy". Archived from the original on 2008-02-20. Retrieved 2008-02-26.CS1 maint: Archived copy as title (link) [1] [2] "Archived copy" (PDF). Archived from the original (PDF) on 2007-09-26. Retrieved 2007-09-26.CS1 maint: Archived copy as title (link) "Archived copy". Archived from the original on 2008-02-20. Retrieved 2008-02-26.CS1 maint: Archived copy as title (link) "Archived copy". Archived from the original on 2008-02-20. Retrieved 2008-02-26.CS1 maint: Archived copy as title (link) [3][dead link]
  3. ^ "ICO Global Communications - ICO and Alcatel-Lucent Finalize Agreement for Mobile Interactive Media Services". Archived from the original on 2008-02-20. Retrieved 2008-03-16.
  4. ^ Expway’s FastESG Solution Selected by ICO Global Communications for Mobile TV Services Archived 2011-07-10 at the Wayback Machine
  5. ^ Eutelsat satellite fleet :: W2A satellite at 10 degrees East
  6. ^ Solaris Mobile
  7. ^ "Archived copy". Archived from the original on 2009-03-01. Retrieved 2009-02-28.CS1 maint: Archived copy as title (link)
  8. ^ Satellite Services - Satellite TV & Communications - SES.com
  9. ^ [4], [5]
  10. ^ "Archived copy". Archived from the original on 2009-06-22. Retrieved 2009-07-03.CS1 maint: Archived copy as title (link), "Archived copy". Archived from the original on 2011-07-13. Retrieved 2009-07-03.CS1 maint: Archived copy as title (link), "Archived copy". Archived from the original on 2008-12-06. Retrieved 2009-07-03.CS1 maint: Archived copy as title (link)
  11. ^ "DTG News: O2 and Arqiva launch DVB-H trial in Ireland". Archived from the original on 2007-10-15. Retrieved 2008-02-26.
  12. ^ "DTG News: UK's first DVB-H mobile TV trial goes live". Archived from the original on 2007-10-15. Retrieved 2008-02-26.
  13. ^ Charged.mobi Archived 2008-02-20 at the Wayback Machine
  14. ^ Dba.org.au Archived 2008-02-20 at the Wayback Machine
  15. ^ mobile-ent.biz Archived 2008-02-22 at the Wayback Machine
  16. ^ Ihaka, James (14 April 2007). "Peek at where-ever when-ever cell TV". The New Zealand Herald. Retrieved 29 September 2011.
  17. ^ DVB-H Versuchssender Erlangen Archived 2007-08-17 at the Wayback Machine
  18. ^ SFR and Alcatel-Lucent tests in the field validate the fundamental assumptions for the deployment of a DVB-SH Mobile TV terrestrial network
  19. ^ [6]
  20. ^ DISH Network Corporation and Alcatel-Lucent to Perform Joint DVB-SH Test in the U.S

External links

This page was last edited on 9 March 2019, at 02:29
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.