NationMaster - Encyclopedia: Digital Multimedia Broadcasting

Digital Multimedia Broadcasting (DMB) is a digital radio transmission system for sending multimedia (radio, TV, and datacasting) to mobile devices such as mobile phones. This technology was first developed in South Korea under the national IT project and the world's first official DMB broadcast started in South Korea in 2005, although trials were available much earlier. It can operate via satellite (S-DMB) or terrestrial (T-DMB) transmission. DMB is based on the Eureka 147 Digital Audio Broadcasting (DAB) standard, and has some similarities with the main competing mobile TV standard, DVB-H. A digital system is one that uses discrete values (often electrical voltages), especially those representable as binary numbers, or non-numeric symbols such as letters or icons, for input, processing, transmission, storage, or display, rather than a continuous spectrum of values (ie, as in an analog system). ... In communications, transmission is the act of transmitting electrical messages (and the associated phenonomena of radiant energy that pass through media). ... ... See TV (disambiguation) for other uses and Television (band) for the rock band European networks National In much of Europe television broadcasting has historically been state dominated, rather than commercially organised, although commercial stations have grown in number recently. ... Datacasting is the broadcasting of data over a wide area via radio waves. ... Handheld devices (also known as handhelds) are pocket-sized computing devices that are rapidly gaining popularity as the access to information in every walk of life becomes more and more mission critical. ... U.S. military MILSTAR communications satellite A communications satellite (sometimes abbreviated to comsat) is an artificial satellite stationed in space for the purposes of telecommunications. ... S-DMB is a hybrid version of Digital Multimedia Broadcasting. ... ... Eureka 147 is a protocol for digital radio broadcasting originally developed in Europe, but now being deployed in many countries around the world. ... Digital Audio Broadcasting (DAB), also known as Eureka 147, is a technology for broadcasting of audio using digital radio transmission. ... Mobile TV is a name used to describe a service to subscribers via mobile telecommunications networks, most probably the mobile phone carriers. ... DVB-H (Digital Video Broadcasting - Handheld) is a technical specification for bringing broadcast services to handheld receivers. ...

Like DAB, T-DMB is made for transmissions on radio frequency bands band III (VHF) and L (UHF), for terrestrial. Because the United States and Canada still allocate the first band as for television broadcasting (VHF channels 7 to 13) and the United States reserves the L band for military applications, DMB is still unavailable in North America. Qualcomm's MediaFLO is a proprietary system used there instead. In Japan, 1seg is the standard, using ISDB. It has been suggested that this article or section be merged with Radio waves. ... A band is a small section of the spectrum of radio communication frequencies, in which channels are usually used or set aside for the same purpose. ... Very high frequency (VHF) is the radio frequency range from 30 MHz to 300 MHz. ... L band (20-cm radar long-band) is a portion of the microwave band of the electromagnetic spectrum ranging roughly from 0. ... This article is about the radio frequency. ... The electromagnetic spectrum is an aspect of the physical world, like land, water, and air. ... Qualcomm (NASDAQ: QCOM) is a wireless telecommunications research and development company based in San Diego, California. ... MediaFLO is Qualcomms new technology to broadcast video to portable devices, like cell phones. ... Proprietary indicates that a party, or proprietor, exercises private ownership, control or use over an item of property, usually to the exclusion of other parties. ... Official 1seg logo 1seg (Katakana: ãƒ¯ãƒ³ã‚»ã‚°) is a mobile terrestrial digital audio/video and data broadcasting service in Japan. ... Integrated Services Digital Broadcasting (ISDB) is the digital television (DTV) and digital audio broadcasting (DAB) format. ...

T-DMB uses MPEG-4 Part 10 (H.264) for the video and MPEG-4 Part 3 BSAC or HE-AAC V2 for the audio. The audio and video is encapsulated in MPEG-2 TS. The stream is RS encoding and the parity word is 16 bytes length. There is convolutional interleaving made on this stream, then the stream is broadcast in data stream mode on DAB. In order to diminish the channel effects such as fading and shadowing, DMB modem uses OFDM-DQPSK modulation. A single-chip T-DMB receiver is also provided by an MPEG-2 transport stream demultiplexer. DMB has several applicable devices such as mobile phone, portable TV, PDA and telematics devices for automobiles. H.264, or MPEG-4 Part 10, is a high compression digital video codec standard written by the ITU-T Video Coding Experts Group (VCEG) together with the ISO/IEC Moving Picture Experts Group (MPEG) as the product of a collective partnership effort known as the Joint Video Team (JVT). ... H.264 is a high compression digital video codec standard written by the ITU-T Video Coding Experts Group (VCEG) together with the ISO/IEC Moving Picture Experts Group (MPEG) as the product of a collective partnership effort known as the Joint Video Team (JVT). ... MPEG-4 Part 3 (formally ISO/IEC 14496-3) is the third part of the ISO/IEC MPEG-4 international standard. ... High Efficiency AAC (HE-AAC) is a lossy data compression scheme for digital audio. ... In mathematics and, in particular, functional analysis, convolution is a mathematical operator which takes two functions f and g and produces a third function that in a sense represents the amount of overlap between f and a reversed and translated version of g. ... Interleaving in computer science is a way to arrange data in a non-contiguous way in order to increase performance. ... Digital Audio Broadcasting (DAB), also known as Eureka 147, is a technology for broadcasting of audio using digital radio transmission. ... Orthogonal frequency division modulation (OFDM, also called orthogonal frequency division multiplexing) is a technique for the modulation of digital information onto an analog carrier electromagnetic (e. ... Phase-shift keying (PSK) is a digital modulation scheme that conveys data by changing, or modulating, the phase of a reference signal (the carrier wave). ... An integrated circuit (IC) is a thin chip consisting of at least two interconnected semiconductor devices, mainly transistors, as well as passive components like resistors. ... MPEG-2 is a standard for the generic coding of moving pictures and associated audio information [1]. It is widely used around the world to specify the format of the digital television signals that are broadcast by terrestrial (over-the-air), cable, and direct broadcast satellite TV systems. ... Streaming media are media that are consumed (read, heard, viewed) while it is being delivered. ... The term multiplexer has uses in several fields of application: Electronics In electronics, a multiplexer or mux is a device that combines several electrical signals into a single signal. ... The term telematics is used in a number of ways: The integrated use of telecommunications and informatics, also known as ICT (Information and Communications Technology). ... Karl Benzs Velo model (1894) - entered into the first automobile race An automobile or motor car (usually shortened to just car) is a wheeled passenger vehicle that carries its own motor. ...

T-DMB is an ETSI standard (TS 102 427 and TS 102 428). The European Telecommunications Standards Institute (ETSI) is a standardization organization of the telecommunications industry (equipment makers and network operators) in Europe, with worldwide projection. ...

Deployment

Currently, DMB is being put into use in a number of countries, although mainly used in South Korea.

South Korea

In 2005, South Korea started S-DMB and T-DMB service on May 1 and December 1, respectively. [1] [2] Year 2005 (MMV) was a common year starting on Saturday (link displays full calendar) of the Gregorian calendar. ... is the 121st day of the year (122nd in leap years) in the Gregorian calendar. ... is the 335th day of the year (336th in leap years) in the Gregorian calendar. ...

As of December 2006, T-DMB service in South Korea consists of, 7 TV channels, 12 radio channels, and 8 data channels. These are broadcast on six multiplexes in the VHF band on TV channels 8 and 12 (6MHz faster). 2006 is a common year starting on Sunday of the Gregorian calendar. ... In telecommunications, multiplexing (also muxing or MUXing) is the combining of two or more information channels onto a common transmission medium using hardware called a multiplexer or (MUX). ...

As of April 2007, S-DMB service in South Korea consists of 15 TV channels and 19 radio channels and 3 data channels.

S-DMB service in South Korea is provided on a subscription basis through TU Media and is accessible throughout the country. T-DMB service is provided free of charge, but access is limited in selected regions. The subscription business model is a business model that has long been used by magazines and record clubs, but the application of this model is spreading. ... TU Media (hangul:í‹°ìœ ë¯¸ë””ì–´) is a South Koreas first mobile broadcast service company headquartered in Seoul, Korea. ...

Around one million receivers have been sold as of June 2006. Receivers are integrated in car navigation systems, mobile phones, portable media players, laptop computers and digital cameras. 2006 is a common year starting on Sunday of the Gregorian calendar. ... Navigation system: Automotive navigation system Inertial guidance system Global Positioning System Robotic mapping Navigation (disambiguation) System (disambiguation) Category: ... A portable multimedia player (PMP) is a self-reliant electronic device that is capable of storing and playing files in one or more media formats. ... Laptop with touchpad. ... This article or section does not cite any references or sources. ...

Today, South Korea has Full T-DMB serviced that include JSS(Jpeg Slide Show),DLS(Dynamic Label Segment),BWS, and TPEG.

In Mid August 2007, Iriver, a multimedia and micro-technology company released their "NV", which utilizes South Korea's DMB service.

Europe and some other countries

Some T-DMB trials are currently planned or available around Europe and other countries: Evaluation is the systematic determination of merit, worth, and significance of something or someone. ... World map showing the location of Europe. ...

Qualifying countries The 2006 FIFA World Cup was the eighteenth instance of the FIFA World Cup, the quadrennial international association football world championship tournament. ... Samsung Group is one of the largest South Korean business groupings. ... City flag City coat of arms Motto: Fluctuat nec mergitur (Latin: Tossed by the waves, she does not sink) The Eiffel Tower in Paris, as seen from the esplanade du TrocadÃ©ro. ... Jakarta (also Djakarta or DKI Jakarta), formerly known as Sunda Kelapa, Jayakarta and Batavia is the capital and largest city of Indonesia. ... Norsk Rikskringkasting (NRK) - the Norwegian Broadcasting Corporation - is the Norwegian state-owned radio and television public broadcasting company. ... County District Municipality NO-1601 Administrative centre Trondheim Mayor (2003-) Rita Ottervik (AP) Official language form Neutral Area - Total - Land - Percentage Ranked 258 342 kmÂ² 322 kmÂ² 0. ...

See also

Official 1seg logo 1seg (Katakana: ãƒ¯ãƒ³ã‚»ã‚°) is a mobile terrestrial digital audio/video and data broadcasting service in Japan. ... China Multimedia Mobile Broadcasting (CMMB) is a mobile television and multimedia standard developed and specified in China by the State Administration of Radio, Film, and Television (SARFT). ... China Multimedia Mobile Broadcasting (CMMB) is a mobile television and multimedia standard developed and specified in China by the State Administration of Radio, Film, and Television (SARFT). ... Digital Audio Broadcasting (DAB), also known as Eureka 147, is a technology for broadcasting of audio using digital radio transmission. ... Digital Radio Mondiale (DRM) is a set of digital audio broadcasting technologies designed to work over the bands currently used for AM broadcast, particularly shortwave. ... DVB, short for Digital Video Broadcasting, is a suite of internationally accepted, open standards for digital television maintained by the DVB Project, an industry consortium with more than 300 members, and published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC... DVB-H (Digital Video Broadcasting - Handheld) is a technical specification for bringing broadcast services to handheld receivers. ... Satellite Digital Radio (SDR) is an activity of the standardisation organisation ETSI. It addresses broadcast systems where a satellite transmits directly to mobile and handheld receivers and is complemented by terrestrial transmitters. ... FMeXtra is an in-band on-channel digital radio broadcasting technology created by Digital Radio Express. ... Handheld or pocket projectors can be the solution to one of the fundamental problems with our ever shrinking cell phones, PDAs, digital cameras, and other portable devices. ... An Internet radio device is a hardware device that receives and plays audio from Internet radio stations or a users PC. The devices which are currently on the market mainly support MP3 (MPEG2 Layer 3) streaming. ... Multimedia Broadcast Multicast Service (MBMS) is a broadcasting service that can be offered via existing GSM and UMTS cellular networks. ... A satellite radio or subscription radio (SR) is a digital radio signal that is broadcast by a communications satellite, which covers a much wider geographical range than terrestrial radio signals. ... Satellite television is television delivered by way of communications satellites, as compared to conventional terrestrial television and cable television. ... WiMAX, the Worldwide Interoperability for Microwave Access, is a telecommunications technology aimed at providing wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access. ... The WorldDMB (formerly World DAB Forum) is an international non-governmental organisation which defines the standards for Digital audio broadcasting. ...

External links

Official

The European Telecommunications Standards Institute (ETSI) is a standardization organization of the telecommunications industry (equipment makers and network operators) in Europe, with worldwide projection. ...

Other

Category: Digital radio A video format describes how one device sends video pictures to another device, such as the way that a DVD player sends pictures to a television, or a computer to a monitor. ... The references in this article would be clearer with a different and/or consistent style of citation, footnoting or external linking. ... NTSC-J is a videogame region which covers Japan. ... PAL-M is the TV system used in Brazil. ... Television encoding systems by nation. ... Television encoding systems by nation. ... PALplus is an extension of the PAL analogue broadcasting system for transmitting 16:9 programs without sacrificing vertical resolution. ... SECAM, also written SÃ‰CAM (SÃ©quentiel couleur Ã mÃ©moire, French for Sequential Color with Memory), is an analog color television system first used in France. ... A number of experimental and broadcast pre World War II systems were tested. ... 405 line is the name of a monochrome analogue television broadcasting system in operation in the UK between 1936 and 1985, and also used for some time in Ireland and Hong Kong. ... Historically, the term high-definition television was first used to refer to television standards developed in the 1930s to replace early experimental systems with as few as 12 lines. ... This schematic shows the circular paths traced by the holes in a Nipkow disk. ... Multiplexed Analogue Components (MAC) is a high-definition television transmission standard, originally proposed in 1995 for European HDTV. MAC transmits luminance and chrominance data separately in time rather than separately in frequency (as other analog television formats do, such as composite video). ... Japan had the earliest working HDTV system, with design efforts going back to 1979. ... Multichannel television sound, better known as MTS (often still as BTSC, for the Broadcast Television Systems Committee that created it), is the method of encoding three additional channels of audio into an NTSC-format audio carrier. ... NICAM (known also as NICAM 728, after the 728 kbit/s bitstream it is sent over), Near Instantaneous Companded Audio Multiplex, is a format for digital sound on analogue television transmissions. ... Zweikanalton (two channel sound) is a television sound transmission system used in Germany and other countries. ... A commonly-used symbol indicating that a program or movie is closed-captioned. ... A BBC Ceefax page from January 9, 2007. ... CGMS-A (Copy Generation Management System Analogue) is a copy protection mechanism for analog television signals. ... Ghost-canceling reference, or GCR, is a special sub-signal on a television channel that receivers can use to attenuate the ghosting effect of a television signal split into multiple paths between transmitter and receiver. ... This article is about PDC/StarText teletext programme listings. ... The vertical blanking interval (VBI) is an interval in a television or VDU signal that temporarily suspends transmission of the signal for the electron gun to move back up to the first line of the television screen to trace the next screen field. ... Video Encoded Invisible Light (VEIL) is a technology for encoding low-bandwidth digital data bitstream in video signal, developed by VEIL Interactive Technologies. ... Vertical interval timecode (VITC, pronounced vitsee or sometimes vits) is a form of SMPTE timecode embedded as black-and-white bars in a pair of the normally unseen vertical interval lines in a television signal. ... In television technology, widescreen signaling (WSS) is a digital stream embedded in the TV signal describing qualities of the broadcast, in particular the intended aspect ratio of the image. ... Extended Data Services (now XDS, previously EDS), is an American standard classified under Electronic Industries Alliance standard EIA-766 for the delivery of any ancillary data (metadata) to be sent with an analog television program, or any other NTSC video signal. ... Standard-definition television or SDTV refers to television systems that have a lower resolution than HDTV systems. ... 480i is the shorthand name for a video mode. ... 576i is the shorthand name for a video mode. ... Projection screen in a home theater, displaying a high-definition television image. ... 1080i (pronounced ten eighty eye) is shorthand name for a category of video modes. ... Low-definition television or LDTV refers to television systems that have a lower resolution than Standard Definition Television systems. ... ... ... Official 1seg logo 1seg (Katakana: ãƒ¯ãƒ³ã‚»ã‚°) is a mobile terrestrial digital audio/video and data broadcasting service in Japan. ... Enhanced-definition television, extended-definition television, or EDTV is a CEA marketing shorthand term for certain digital television (DTV) formats. ... 480p is the shorthand name for a video mode. ... 576p is the shorthand name for a video mode. ... Projection screen in a home theater, displaying a high-definition television image. ... JOHN HERMAN SUCKS FAT DICK ... 1080p is the shorthand name for a category of display resolutions. ... MPEG-2 is a standard for the generic coding of moving pictures and associated audio information [1]. It is widely used around the world to specify the format of the digital television signals that are broadcast by terrestrial (over-the-air), cable, and direct broadcast satellite TV systems. ... ATSC Standards document a digital television format intend to replace (in the United States) the analog NTSC television system (NTSC is used mostly in North America and Japan). ... Official DVB logo, found on compliant devices DVB, short for Digital Video Broadcasting, is a suite of internationally accepted open standards for digital television. ... Integrated Services Digital Broadcasting (ISDB) is the digital television (DTV) and digital audio broadcasting (DAB) format. ... MPEG-4 is a standard used primarily to compress audio and visual (AV) digital data. ... This article or section is in need of attention from an expert on the subject. ... MPEG-4 AAC DRM encoding as used in the iTunes Store Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio. ... Multichannel audio is the name for a variety of techniques for expanding and enriching the sound of audio playback by recording additional sound channels that can be reproduced on additional speakers. ... MP2, also known as Musicam, is a short form of MPEG Audio Layer II, and it is also used as a file extension for files containing audio data of this type. ... Pulse-code modulation (PCM) is a digital representation of an analog signal where the magnitude of the signal is sampled regularly at uniform intervals, then quantized to a series of symbols in a digital (usually binary) code. ... Linear Pulse Code Modulation used in communications (or LPCM) is a format that is a popular choice in music production. ... A commonly-used symbol indicating that a program or movie is closed-captioned. ... A BBC Ceefax page from January 9, 2007. ... This is the Content Protection and Copy Management standard being developed by the DVB Project (http://www. ... A broadcast flag is a set of status bits (or flags) sent in the data stream of a digital television program that indicates whether or not it can be recorded, or if there are any restrictions on recorded content. ... In television technology, Active Format Descriptor or Active Format Description (AFD) is a signal that broadcasters will transmit with the picture to enable 4:3 and 16:9 television sets to display picture in the intended aspect ratio. ... The Sky Digital EPG in the United Kingdom and Republic of Ireland. ... This article is about digital presentation. ... Super Hi-Vision, also known as Ultra High Definition Video or UHDV is a digital video format, currently proposed by NHK of Japan. ... There are very few or no other articles that link to this one. ... Super Hi-Vision, also known as Ultra High Definition Video or UHDV and UHD is a digital video format, currently proposed by NHK of Japan. ... Digital Cinema Initiatives or DCI is a consortium of studios and vendors formed to establish a standard architecture for Digital Cinema systems. ... 22. ... Multiple MPEG programs are combined then sent to a transmitting antenna. ... Converting between a different numbers of pixels and different frame rates in video pictures is a complex technical problem. ... Video processing techniques are used in video codecs, video players and other devices. ... Video on demand (VOD) systems allow users to select and watch video and clip content over a network as part of an interactive television system. ...