DVB-SH

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.

Comparison with DVB-H

Frequencies
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 (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.

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]

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]
  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

1seg

1seg (ワンセグ, wansegu) is a mobile terrestrial digital audio/video and data broadcasting service in Japan, Argentina, Brazil, Chile, Uruguay, Peru and the Philippines. Service began experimentally during 2005 and commercially on April 1, 2006. It is designed as a component of ISDB-T, the terrestrial digital broadcast system used in those countries, as each channel is divided into 13 segments, with a further segment separating it from the next channel; an HDTV broadcast signal occupies 12 segments, leaving the remaining (13th) segment for mobile receivers, hence the name, "1seg" or "One Seg".

Its use in Brazil was established in late 2007 (starting in just a few cities), with a slight difference from the Japanese counterpart: it is broadcast under a 30 frame/s transmission setting (Japanese broadcasts are under the 15 frame/s transmission setting).

China Multimedia Mobile Broadcasting

China Mobile Multimedia Broadcasting (CMMB) is a mobile television and multimedia standard developed and specified in China by the State Administration of Radio, Film, and Television (SARFT). It is based on the Satellite and Terrestrial Interactive Multiservice Infrastructure (STiMi), developed by TiMiTech, a company formed by the Chinese Academy of Broadcasting Science. Announced in October 2006, it has been described as being similar to Europe's DVB-SH standard for digital video broadcast from both satellites and terrestrial repeaters to handheld devices.It specifies usage of the S-band/U-band and occupies 25 MHz bandwidth within which it provides 25 video and 30 radio channels with some additional data channels. Multiple companies have chips that support CMMB standard - Innofidei who was the first with a solution March 28, 2007,Other manufacturers, such as Unique Broadband Systems, were quick to enter the race and grab a share of the handheld broadcasting market with their hardware platform supporting both CMMB and DTMB (as well as others) standard waveforms.

DVB-C

DVB-C stands for "Digital Video Broadcasting - Cable" and it is the DVB European consortium standard for the broadcast transmission of digital television over cable. This system transmits an MPEG-2 or MPEG-4 family digital audio/digital video stream, using a QAM modulation with channel coding. The standard was first published by the ETSI in 1994, and subsequently became the most widely used transmission system for digital cable television in Europe, Asia and South America. It is deployed worldwide in systems ranging from the larger cable television networks (CATV) down to smaller satellite master antenna TV (SMATV) systems.

DVB-H

DVB-H (Digital Video Broadcasting - Handheld) is one of three prevalent mobile TV formats. It is a technical specification for bringing broadcast services to mobile handsets. DVB-H was formally adopted as ETSI standard EN 302 304 in November 2004. The DVB-H specification (EN 302 304) can be downloaded from the official DVB-H website. From March 2008, DVB-H is officially endorsed by the European Union as the "preferred technology for terrestrial mobile broadcasting". The major competitors of this technology are Qualcomm's MediaFLO system, the 3G cellular system based MBMS mobile-TV standard, and the ATSC-M/H format in the U.S. DVB-SH (Satellite to Handhelds) now and DVB-NGH (Next Generation Handheld) in the future are possible enhancements to DVB-H, providing improved spectral efficiency and better modulation flexibility. DVB-H has been a commercial failure, and the service is no longer on-air. Ukraine was the last country with a nationwide broadcast in DVB-H.

DVB-MS

DVB-MS is a complementary system for digital television multi-point distribution based on the satellite delivery system DVB-S. For cable delivery system DVB-MC is used which is based on DVB-C.

The DVB-MS system uses microwave frequencies above > 10 GHz to directly distribute television services from a central point to homes of viewers. To receive the signal a small frequency converter is used instead of a satellite dish for DVB-S. DVB-MC uses frequencies below 10 GHz.

DVB-S

Digital Video Broadcasting – Satellite (DVB-S) is the original DVB standard for Satellite Television and dates from 1995, in its first release, while development lasted from 1993 to 1997. The first commercial application was by Galaxy in Australia, enabling digitally broadcast, satellite-delivered Television to the public.

It is used via satellites serving every continent of the world. DVB-S is used in both Multiple Channel Per Carrier (MCPC) and Single channel per carrier modes for Broadcast Network feeds as well as for direct-broadcast satellite services like Sky (UK & Ireland) via Astra in Europe, Dish Network and Globecast in the U.S. and Bell TV in Canada.

While the actual DVB-S standard only specifies physical link characteristics and framing, the overlaid transport stream delivered by DVB-S is mandated as MPEG-2, known as MPEG transport stream (MPEG-TS).

Some amateur television repeaters also use this mode in the 1.2 GHz amateur band.

DVB-S2X

DVB-S2X is an extension of DVB-S2 satellite digital broadcasting standard.

DVB-S2X is a digital satellite television broadcast standard. It has been standardised by DVB Project in March 2014 as an optional extension of DVB-S2 standard. It will also become an ETSI standard.

DiBcom

DiBcom was a French fabless semiconductor company that designs chipsets for low-power mobile TV and radio reception. Its chipsets are compliant with the current worldwide Digital Video Broadcasting standards DVB-T, DVB-T2, DVB-H, DVB-SH, with ATSC-M/H, ISDB-T (1seg and Full-SEG), CMMB and with DAB, DAB+, DMB in multistandard programmable platforms. It specializes in antenna diversity demodulator chipsets with a built-in tuner to minimize component count.

DiBcom has been acquired by Parrot in September 2011.

Digital Terrestrial Multimedia Broadcast

DTMB (Digital Terrestrial Multimedia Broadcast) is the TV standard for mobile and fixed terminals used in the Mainland China, Cuba, Hong Kong and Macau.

Digital Video Broadcasting

Digital Video Broadcasting (DVB) is a set of international open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium, and are published by a Joint Technical Committee (JTC) of the European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).

Digital audio radio service

Digital audio radio service (DARS) refers to any type of digital radio program service. In the United States it is the official FCC term for digital radio services.

The most popular type of DARS in the U.S. and Canada is SDARS: Satellite Digital Audio Radio Service, used by Sirius Satellite Radio and XM Satellite Radio. XM and Sirius both operate in the 2.3-GHz S band, from 2320 to 2345 MHz.Increasing the spectrum available for more services would be difficult, since unlike C-band and Ku band services, which allow over 200 locations for satellites, S-band satellites must be spaced far apart, with current technology. Existing vehicle antennas would not allow reception of two different stations on the same frequency, though new technology, requiring a new kind of receiver, might be possible.WorldSpace also operated a DARS network outside the United States and Canada with a footprint covering Europe, Asia, the Middle East and Africa. It used the L-band.

ETSI Satellite Digital Radio

ETSI Satellite Digital Radio (SDR or ETSI SDR) describes a standard of satellite digital radio. It is an activity of the European standardisation organisation ETSI.

It addresses systems where a satellite broadcast directly to mobile and handheld receivers in L band or S band and is complemented by terrestrial transmitters. The broadcast content consists of multicast audio (digital radio), video (mobile TV) and data (program guide, text and graphical information, as well as off-line content). The satellite component allows geographical coverage at low cost, whereas the terrestrial component improves reception quality in built up areas. The specifications considers conditional access and Digital Rights Management.1worldspace will use ETSI SDR in its new network covering Europe from 2009. Also Ondas Media has announced to use ETSI SDR.The ETSI SDR is also similar to the Sirius XM Radio, the S-DMB used in South Korea for multimedia broadcasting since May 2005, the China Multimedia Mobile Broadcasting (CMMB) and the defunct MobaHo! service (2004-2009). The DVB-SH specifications, which the DVB Project has created, target similar broadcast systems as ETSI SDR.

EchoStar Mobile

EchoStar Mobile was set up in 2008 as Solaris Mobile, a joint venture company between SES and Eutelsat Communications to develop and commercialize the first geostationary satellite systems in Europe for broadcasting video, radio and data to in-vehicle receivers and to mobile devices, such as mobile phones, portable media players and PDAs. In January 2014 all stock in Solaris Mobile was acquired by EchoStar Corporation and in March 2015 the company was renamed EchoStar Mobile.The agreement to set up Solaris Mobile was reached in 2006 with the company formed in 2008. SES and Eutelsat – both successful European satellite operators, providing TV and other services from geostationary satellites to millions of cable and direct-to-home viewers – invested €130m in the venture. The services to be developed included video, radio, multimedia data, interactive services, and voice communications, with the primary aim of delivering mobile television any time, anywhere. Its headquarters is in Dublin, in the Republic of Ireland.

Solaris Mobile's first commercial contract was with Italian media publishing group Class Editori, to launch a digital radio service in Italy. A hybrid satellite/terrestrial network will initially be deployed in Milan, in October 2011 and extended across the country in 2012. Solaris claims that the network will enable Italians to access dozens of new digital radio channels broadcasting music, news, entertainment and sports, in their original format with continuity of reception across the entire country, and that the digital audio signal will be complemented with new visual media services such as programme information and traffic data.

Enensys Technologies

ENENSYS is a manufacturer of Broadcast Network Equipment and Test & Monitoring Equipment for digital broadcast. The company provides products for the following fields:

Mobile TV (DVB-H, T-DMB, DVB-SH, CMMB)

Digital Terrestrial TV (DVB-T2, DVB-T, DTMB China, ATSC)

Video over IP (MPEG2-TS over IP / DVB over IP) and DAB/DMB over IP

List of communications satellite firsts

Milestones in the history of communications satellites.

Multicast-broadcast single-frequency network

Multimedia Broadcast multicast service Single Frequency Network (MBSFN) is a communication channel defined in the fourth-generation cellular networking standard called Long Term Evolution (LTE). The transmission mode is intended as a further improvement of the efficiency of the enhanced Multimedia Broadcast Multicast Service (eMBMS) service, which can deliver services such as mobile TV using the LTE infrastructure, and is expected to compete with dedicated mobile/handheld TV broadcast systems such as DVB-H and DVB-SH. This enables network operators to offer mobile TV without the need for additional expensive licensed spectrum and without requiring new infrastructure and end-user devices.The eMBMS service can offer many more TV programs in a specific radio frequency spectrum as compared to traditional terrestrial TV broadcasting, since it is based on the principles of Interactive Multicast, where TV content only is transmitted in where there currently are viewers. The eMBMS service also provides better system spectral efficiency than video-on-demand over traditional cellular unicasting services, since in eMBMS, each TV program is only transmitted once in each cell, even if there are several viewers of that program in the same cell. The MBSFN transmission mode further improves the spectral efficiency, since it is based on the principles of Dynamic single frequency networks (DSFN). This implies that it dynamically forms single-frequency networks (SFNs), i.e. groups of adjacent base stations that send the same signal simultaneously on the same frequency sub-carriers, when there are mobile TV viewers of the same TV program content in the adjacent cells. The LTE OFDMA downlink modulation and multiple access scheme eliminates self-interference caused by the SFN:s. Efficient TV transmission using similar combinations of Interactive multicast (IP Multicast) and DSFN has also been suggested for the DVB-T2 and DVB-H systems.MBMS and mobile TV was a failure in 3G systems, and was offered by very few mobile operators, partly because of its limited peak bit rates and capacity, not allowing standard TV video quality, something that LTE with eMBMS does not suffer from.

S-DMB

S-DMB (Satellite-DMB) is a hybrid version of the Digital Multimedia Broadcasting. The S-DMB uses the S band (2170-2200 MHz) of IMT-2000. and delivers around 18 channels at 128 kbit/s in 15 MHz. It incorporates a high power geostationary satellite, the MBSat 1. For outdoor and light indoor coverage is integrated with a terrestrial repeater (low power gap-filler) network for indoor coverage in urban areas.

A similar architecture is also used in XM Satellite Radio, Sirius Satellite Radio, DVB-SH and ETSI Satellite Digital Radio (SDR).

Satellite data unit

A satellite data unit (SDU) is an avionics device installed in an aircraft that allows air/ground communication via a satellite network. It is an integral part of an aircraft's SATCOM (satellite communication) system. The device connects with a satellite via ordinary radio frequency (RF) communication and the satellite then connects to a ground station or vice versa. All satellite communication whether audio or data is processed by the SDU.The SDU communicates with an onboard MDDU (multi-purpose disk-drive unit) which maintains an updatable table of ground stations in the aircraft's current area and the order of preference for selection of which ground station to use which thus guides the choice of satellite. Along with analysing data continuously sent from all ground stations (such as station status and the error rate of signals from each station) the SDU receives information on the aircraft's position and orientation from another onboard system (ADIRU, air data inertial reference unit) which it passes to the BSU (beam-steering unit) to direct the signal beam from the aircraft to the chosen satellite.With the advent of cellphones and the Internet a separate or integrated SDU can be used to offer telephone and Internet services to passengers.Logs of satellite communication have been used to inform search and rescue agencies of locations of missing aircraft, notably that of Malaysia Airlines Flight 370 whose position was unknown due to loss of radar contact and other communications. Automated SATCOM transmissions suggested it flew about 1,600 km (1,000 mi) off its designated flight path having flown approximately south-southwest rather than the intended approximately north-northeast.

UDcast

UDcast was a company that provided products for Internet Protocol (IP) over broadcast media. It developed technology for IP networks over satellite and servers to provide television on mobile networks.

Terrestrial
Satellite
Codecs
Subcarrier signals
Main articles
Hardware
Satellite radio / TV
Broadcast companies
Relay satellite companies
Satellite manufacturers
Trade organizations
Lists

This page is based on a Wikipedia article written by authors (here).
Text is available under the CC BY-SA 3.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.