DMB-T/H or DTMB (GB 20600-2006) is the digital terrestrial television standard applied in the People's Republic of China (PRC), including Hong Kong. Digital Terrestrial Television ( DTTV or DTT) is an implementation of digital technology to provide a greater number of channels and/or better quality of picture and Talk People's Republic of China) PEOPLE'S REPUBLIC OF CHINA ARTICLE GUIDELINES Hong Kong ( officially the Hong Kong Special Administrative Region, is a territory located on China 's south coast on the Pearl River Delta, and borders This mandatory standard will cover both fixed and mobile terminals and will eventually serve more than half of the television viewers in the PRC, especially those in suburban and rural areas.
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Overview
The standard is being officially called Digital Terrestrial Multimedia Broadcast (abbreviated as DTMB. The standard was formerly named as Digital Multimedia Broadcast-Terrestrial/Handheld and in short DMB-T/H). DTMB is an outgrowth of work at Jiaotong University (developed ADTB-T, similar to ATSC, which coexists with DVB-T) in Shanghai and Tsinghua University (developed DMB-T) in Beijing, each of which had hoped to provide the sole technology – but neither of which had the technical or political muscle to achieve that goal, the final decision was to opt for a dual standard and fuse with the TiMi 3 standard, as a direct result of backward compatibility as the exploitation of ADTB-T, DMB-T and DVB-T for HDTV transmission via set-top boxes occurred prior to the final draft of the standard, thus making DTMB a fusion of the two aforementioned standards, the ADTB-T and DMB-T. Shanghai Jiao Tong University ( abbreviated Jiao Da (交大 or SJTU) located in Shanghai, is one of the oldest and most influential universities DVB-T is an abbreviation for Digital Video Broadcasting – Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of Tsinghua University ( THU;) is a University in Beijing, People's Republic of China. Digital Multimedia Broadcasting ( DMB) is a Digital Radio transmission system for sending Multimedia ( Radio, TV In Technology, especially Computing (irrespective of platform a product is said to be backward compatible when it is able to take the place of an older product Digital Multimedia Broadcasting ( DMB) is a Digital Radio transmission system for sending Multimedia ( Radio, TV DVB-T is an abbreviation for Digital Video Broadcasting – Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of A set-top box (STB or set-top unit (STU is a device that connects to a Television and an external source of signal, turning the signal into
The data transmission methodology implemented by the standard is the TDS-OFDM [1] (short for "Time Domain Synchronuous-Orthogonal frequency-division multiplexing"), which mainly is a multiple-carrier modulation technology, supporting both single-carrier and dual-carrier modulation schemes. Methodology (also called manner) is defined as "the analysis of the principles of methods rules and postulates employed by a discipline" Orthogonal frequency-division multiplexing ( OFDM) — essentially identical to Coded OFDM ( COFDM) and Discrete multi-tone modulation ( The standard, according to the co-developer of the DMB-T standard with Tsing Hua University, is capable of transmitting "acceptable" signal qualities for the HDTV receiver to be moving at 200 km/h speed. (For the South African airport with IATA code "KMH" see Johan Pienaar Airport. The standard also has the support of mobile digital TV service on handhelds which is absent from typical digital TV implementations in Europe and America. A mobile device (also known as cellphone device, handheld device, handheld computer, "Palmtop" or simply handheld) is a pocket-sized In addition to these, the radius of the area with signal coverage using the DTMB standard is 10 km longer than the European implementation, the DVB-T standard. The kilometre ( American spelling: kilometer) symbol km is a unit of Length in the Metric system, equal to one thousand The standard also has the advantages of the three standards, DVB-T, ADTB-T and TiMi 3 as the DTMB standard is the fuse of three technologies. DVB-T is an abbreviation for Digital Video Broadcasting – Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of
Despite the advantages, there are also short comings of the standard. As the standard supports both, single-carrier and dual-carrier modulation schemes as well as not defining the default video encoding standards, the R&D cost and complexity of the chip IC for this standard will be increased, leading to more expensive receiver products. The phrase research and development (also R and D or more often R&D) according to the Organization for Economic Co-operation and Development, refers In addition, TV programs bought from overseas which are broadcast in digital TV format may have to do a signal conversion that suits the DTMB environment, as the DTMB standard is slightly different than the original DVB-T and ATSC standards, which is less cost effective. DVB-T is an abbreviation for Digital Video Broadcasting – Terrestrial; it is the DVB European-based consortium standard for the broadcast transmission of
It is worth to note in spite of the data transmission methodology of the standard being set, the standard itself does not restrict broadcasters to certain number of video codecs to be used in transmitting digital TV signals, that each individual broadcasters have the discretion to utilize any of the video codecs that supports high-definition video, as well as the systems providing subtitles, Electronic Programme Guides and interactive features. Methodology (also called manner) is defined as "the analysis of the principles of methods rules and postulates employed by a discipline" A video Codec is a device or Software that enables Video compression and/or decompression for digital video A video Codec is a device or Software that enables Video compression and/or decompression for digital video High-definition (HD video generally refers to any video system of higher resolution than standard-definition (SD video most commonly at display resolutions of 1280×720 See the section below for different implementations. DMB-T/H or DTMB ( GB 20600-2006 is the Digital terrestrial television standard applied in the People's Republic of China (PRC including
Utilization
Mainland China
The PRC government announced the final approval of the standard on August 1, 2007. All video contents of the 2008 Beijing Olympics will be broadcast in high-definition (720p or 1080i) using the DMB-T standard.
Hong Kong SAR
Digital broadcasts in Hong Kong began at 7 p. Conventional Free-to-air Analogue television transmission has been used in Hong Kong since the 1967 the establishment of TVB with its TVB Jade channel m. on December 31, 2007. One of the free-to-air television broadcasters, TVB, will broadcast the Olympics in high-definition with 5. 1 Dolby Digital surround sound.
Further reading
- Kumar, Amitabh (2007). Mobile TV: DVB-H, DMB, 3G Systems and Rich Media Applications, Focal Press Media Technology Professional Series. Focal Press. ISBN 978-0-240-80946-5.
Countries and territories using DMB-T/H
Asia
The Americas
See also
- OFDM system comparison table
- Media in the People's Republic of China
- Communications in the People's Republic of China
- Telecommunications industry in China
- Digital television in China (PRC)
- Technical standards in colonial Hong Kong
- Digital terrestrial television
- ATSC Standards- Advanced Television Systems Committee Standard
- DVB-T - Digital Video Broadcasting--Terrestrial
- ISDB - Integrated Services Digital Broadcasting
References
- ^ (Chinese) Tsing Hua University coverage, retrieved October 18, 2007
External links
- (Chinese) Information page of the standard on Standardization Administration of PRC site
- (Chinese) Official announcement of intent to approve the standard on August 1, 2007 made by Standardization Administration of PRC
- (Chinese) ChineseNewsNet report
- (Chinese) C|Net China report
- Hong Kong Technical Standard for Digital Terrestrial Television Broadcasting
- MING-T, Multistandard Integrated Network convergence for Global Mobile and Broadcast Technologies
- (Spanish) Venezuela starts trials DTMB
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