DTMB (Digital Terrestrial Multimedia Broadcast) is the digital TV standard for mobile and fixed devices, developed in the People's Republic of China. It is used there and in both of their special administrative regions (Hong Kong and Macau), and also in Cambodia, the Comoros, Cuba, East Timor, Laos, Vietnam and Pakistan.[1] In Pakistan, as part of the China–Pakistan Economic Corridor Project, ZTE Corporation will provide Pakistan Television Corporation collaboration across several digital terrestrial television technologies, staff training and content creation including partnerships with Chinese multinational companies in multiple areas including television sets and set top boxes as a form of "International Cooperation".[2]
Previously known as DMB-T/H (Digital Multimedia Broadcast-Terrestrial/Handheld), the DTMB is a merger of the standards ADTB-T (developed by the Shanghai Jiao Tong University), DMB-T (developed by Tsinghua University) and TiMi (Terrestrial Interactive Multiservice Infrastructure); this last one is the standard proposed by the Academy of Broadcasting Science in 2002.
At first, neither Shanghai Jiao Tong University nor Tsinghua had enough political strength to make their own technology become the unique standard, so the final decision was to opt for a double standard, merged with the TIMI 3 standard, responding to a need for backward compatibility.
The DTMB was created in 2004 and finally became an official DTT standard in 2006.
Besides the basic functions of traditional television service, the DTMB allows additional services using the new television broadcasting system. DTMB system is compatible with fixed reception (indoor and outdoor) and mobile digital terrestrial television.
Mobile reception: is compatible with digital broadcasting TV in standard definition (SD), digital audio broadcasting, multimedia broadcasting and data broadcasting service.
Fixed reception: in addition to the previous services, also supports high definition digital broadcasting (HDTV).
Modulation
The DTMB standard uses many advanced technologies to improve their performance, for example, a pseudo-random noise code (PN) as a guard interval that allows faster synchronization system and a more accurate channel estimation, Low-Density Parity Check (LDPC) for error correction, modulation Time Domain Synchronization - Orthogonal Frequency Division Multiplexing (TDS-OFDM) which allows the combination of broadcasting in SD, HD and multimedia services, etc.
This system gives flexibility to the services offered to support the combination of single-frequency networks (SFN) and multi-frequency networks (MFN). The different modes and parameters can be chosen depending on the type of service and network's environment.
The sequence of pseudo-random pattern is defined in time domain and the information of the Discrete Fourier transform (DFT) is defined in the frequency domain. The two frames are multiplexed in the time domain, resulting in Time domain synchronization (TDS).
Functional scheme
This transmission system makes the conversion of the input signal to the output data of terrestrial TV signal.
The data passes through the encoder, the error protection process FEC (Forward Error Correction), through the constellation mapping process and then the interleaving processes the information to create the data blocks. The data block and the TPS information are multiplexed, and pass through the data processor to form the body structure. It combines information from the body and the head to form the frame and this is passed through the SRRC (Square Root Raised Cosine) filter to become a signal within an 8 MHz channel bandwidth. Finally the signal is modulated to put it in the corresponding frequency band.
Features
Bit-rate: from 4.813 Mbit/s to 32.486 Mbit/s
Combination of SD, HD, and multimedia services
Flexibility of services
Time and frequency domain of data-processing
Broadcasting of between 6 and 15 SD channels and 1 or 2 HD channels
^"Government to switch off analogue television services at end-November 2020". Retrieved 30 May 2019.
^. Archived from the original on 2019-09-24. Retrieved 2019-09-24.
^"China to promote digital television broadcasting in Cambodia".
^. en.indian-ocean-times.com. Archived from the original on 2019-09-24.
^"Cuba adopts Chinese TV standard". 22 March 2013.
^"ZTE and Pakistan Sign Digital Terrestrial Television Agreement - ZTE Press Release".
^"The China-aided Digital Television Terrestrial Multimedia Broadcasting (DTMB) Demonstration Project Kicks off".
^CNTV English 2013-03-22 at the Wayback Machine. Retrieved March 21, 2013
Further reading
Kumar, Amitabh (2007). Mobile TV: DVB-H, DMB, 3G Systems and Rich Media Applications. Focal Press Media Technology Professional Series. Focal Press. ISBN978-0-240-80946-5.
External links
ATSC, DTMB, DVB-T/DVB-T2, and ISDB-T - Digital Terrestrial Television (DTT)
(in Chinese) on Standardization Administration of PRC site
(in Chinese) of intent to approve the standard on August 1, 2007, made by Standardization Administration of PRC
(in Chinese)
(in Chinese)
Hong Kong Technical Standard for Digital Terrestrial Television Broadcasting
MING-T, Multistandard Integrated Network convergence for Global Mobile and Broadcast Technologies
(in Spanish)
April 24, 2023
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DTMB redirects here DTMB is also the ICAO code for Monastir Airport DTMB Digital Terrestrial Multimedia Broadcast is the digital TV standard for mobile and fixed devices developed in the People s Republic of China It is used there and in both of their special administrative regions Hong Kong and Macau and also in Cambodia the Comoros Cuba East Timor Laos Vietnam and Pakistan 1 In Pakistan as part of the China Pakistan Economic Corridor Project ZTE Corporation will provide Pakistan Television Corporation collaboration across several digital terrestrial television technologies staff training and content creation including partnerships with Chinese multinational companies in multiple areas including television sets and set top boxes as a form of International Cooperation 2 Contents 1 Overview 1 1 DTMB in China 1 2 DTMB channel available in China 1 3 DTMB in Hong Kong 1 4 DTMB in Macau 1 5 DTMB elsewhere 2 Versus CMMB 3 Countries and territories using DTMB 3 1 Asia 3 2 Caribbean 3 3 Africa 4 Description 4 1 Modulation 4 2 Functional scheme 4 3 Features 5 See also 6 References 7 Further reading 8 External linksOverview EditPreviously known as DMB T H Digital Multimedia Broadcast Terrestrial Handheld the DTMB is a merger of the standards ADTB T developed by the Shanghai Jiao Tong University DMB T developed by Tsinghua University and TiMi Terrestrial Interactive Multiservice Infrastructure this last one is the standard proposed by the Academy of Broadcasting Science in 2002 At first neither Shanghai Jiao Tong University nor Tsinghua had enough political strength to make their own technology become the unique standard so the final decision was to opt for a double standard merged with the TIMI 3 standard responding to a need for backward compatibility The DTMB was created in 2004 and finally became an official DTT standard in 2006 DTMB in China Edit 2005 trial 3 18 08 2006 formal adoption as a DTT standard 3 2008 analogue to digital switchover 3 2020 2021 analog switchoff 3 On 1 April 2021 the digital terrestrial television of the People s Republic of China fully turned shifted and switched to all full high definition for all nationwide Ref wiki ActicleDTMB channel available in China Edit National CCTV 1 2 4 7 9 10 11 12 13 14 15 CGTN English Provinces Main channel of province TV in each province High Definition Channel Varies City or Local channel VariesDTMB in Hong Kong Edit Main article Television in Hong Kong Digital television 18 08 2006 formal adoption as a DTT standard 3 31 12 2007 analogue to digital switchover 3 30 11 2020 analogue switchoff 4 DTMB in Macau Edit 18 08 2006 formal adoption as a DTT standard 3 15 07 2008 analogue to digital switchoverDTMB elsewhere Edit DTMB started in Laos in 2007 5 Cambodia adopted the DTMB standard in 2012 6 The Comoros chose DTMB in 2013 7 Cuba adopted DTMB in 2013 8 In 2017 Pakistan and ZTE signed a contract to deploy DTMB broadcasts in the country by 2020 9 East Timor adopted DTMB and work to implement it started in 2019 10 Versus CMMB EditSee China Multimedia Mobile Broadcasting CMMB Countries and territories using DTMB Edit DTT broadcasting systems Countries using DTMB are shown in purple Asia Edit Cambodia China including its SARs Hong Kong Macau East Timor trial Laos PakistanCaribbean Edit Cuba 11 Africa Edit ComorosDescription EditBesides the basic functions of traditional television service the DTMB allows additional services using the new television broadcasting system DTMB system is compatible with fixed reception indoor and outdoor and mobile digital terrestrial television Mobile reception is compatible with digital broadcasting TV in standard definition SD digital audio broadcasting multimedia broadcasting and data broadcasting service Fixed reception in addition to the previous services also supports high definition digital broadcasting HDTV Modulation Edit The DTMB standard uses many advanced technologies to improve their performance for example a pseudo random noise code PN as a guard interval that allows faster synchronization system and a more accurate channel estimation Low Density Parity Check LDPC for error correction modulation Time Domain Synchronization Orthogonal Frequency Division Multiplexing TDS OFDM which allows the combination of broadcasting in SD HD and multimedia services etc This system gives flexibility to the services offered to support the combination of single frequency networks SFN and multi frequency networks MFN The different modes and parameters can be chosen depending on the type of service and network s environment The sequence of pseudo random pattern is defined in time domain and the information of the Discrete Fourier transform DFT is defined in the frequency domain The two frames are multiplexed in the time domain resulting in Time domain synchronization TDS Functional scheme Edit This transmission system makes the conversion of the input signal to the output data of terrestrial TV signal The data passes through the encoder the error protection process FEC Forward Error Correction through the constellation mapping process and then the interleaving processes the information to create the data blocks The data block and the TPS information are multiplexed and pass through the data processor to form the body structure It combines information from the body and the head to form the frame and this is passed through the SRRC Square Root Raised Cosine filter to become a signal within an 8 MHz channel bandwidth Finally the signal is modulated to put it in the corresponding frequency band Features Edit Bit rate from 4 813 Mbit s to 32 486 Mbit s Combination of SD HD and multimedia services Flexibility of services Time and frequency domain of data processing Broadcasting of between 6 and 15 SD channels and 1 or 2 HD channels Same quality of reception as wire broadcastSee also EditCMMB OFDM system comparison table Media of China Telecommunications in China Telecommunications industry in China Digital television in China PRC Technical standards in Hong Kong Digital terrestrial television ATSC Standards Advanced Television Systems Committee Standard DVB T Digital Video Broadcasting Terrestrial ISDB T International Integrated Services Digital Broadcasting InternationalReferences Edit Pilot Project of Digital Terrestrial Multimedia Broadcast DTMB China Pakistan Economic Corridor CPEC Official Website ZTE to provide DTMB broadcasting infrastructure for Pakistan s PTV a b c d e f g DTV Status Retrieved May 30 2012 Government to switch off analogue television services at end November 2020 Retrieved 30 May 2019 Media in Laos moves forward with digitalisation despite challenges Asia News Network Archived from the original on 2019 09 24 Retrieved 2019 09 24 China to promote digital television broadcasting in Cambodia Comoros choose the Chinese standard for the deployment of digital terrestrial television in June 2015 en indian ocean times com Archived from the original on 2019 09 24 Cuba adopts Chinese TV standard 22 March 2013 ZTE and Pakistan Sign Digital Terrestrial Television Agreement ZTE Press Release The China aided Digital Television Terrestrial Multimedia Broadcasting DTMB Demonstration Project Kicks off CNTV English Archived 2013 03 22 at the Wayback Machine Retrieved March 21 2013Further reading EditKumar 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 External links EditATSC DTMB DVB T DVB T2 and ISDB T Digital Terrestrial Television DTT DMB TH Reference Design IEEE Spectrum Does China Have the Best Digital Television Standard on the Planet in Chinese Information page of the standard on Standardization Administration of PRC site in Chinese Official announcement of intent to approve the standard on August 1 2007 made by Standardization Administration of PRC in Chinese ChineseNewsNet report in 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 in Spanish Venezuela starts trials DTMB Retrieved from https en wikipedia org w index php title Digital Terrestrial Multimedia Broadcast amp oldid 1138516152, wikipedia, wiki, book, books, library,
