Digital television has come accompanied by an enormous amount of changes and new currents in the broadcasting industry, thanks to a series of new technologies. Consumer demand for video superior quality is being satisfied by transmissions HDTV, while broadcasters offer a variety of programming of multichannel initiatives. Meanwhile, the international IPTV and cable subscribers every day are they are more accustomed to on-demand programming, thanks to the server-based technologies and the interactivity they are allow; Digital video recorders (DVRs) flourish in the subscription model of satellite, cable or television IPTV.
These developments reflect the way viewers have changed their TV consumption habits. The success of the model by demand seems to be the precursor of a growing interest in mobile television. The delivery of video programming to cell phones and others mobile devices, using traditional broadcast technologies, continues to spark interest and debate in all areas Continents. The platform, which is taking off in certain regions, generates greater interest in other areas as it is possible to shape the business model.
The development of a package of programs is a crucial issue, while broadcasters and wireless service providers build their packages service based on preliminary and other surveys Research. Meanwhile, manufacturers refine the technological platform from header to delivery, starting at the point of purchase and ending with delivery of the content on the consumer's device.
The design of a header of Mobile TV is not much different from that of a header traditional television. To cite a few examples of States Unidos, service providers such as Modeo and MediaFLO, of Qualcomm, have developed central headers and facilities of network distribution, similar to programming environments multichannel. As in any national operations center, there is many servers, digital branding systems, routers, signal processors, digital asset management and playout automated, among other typical broadcast solutions. These systems are used to acquire, manipulate, monitor and establish the conditions of access of TV signals digital in preparation for distribution.
The distribution model of the Mobile TV takes advantage of coding advanced (and in some cases multiplexing), which is common on digital cable, satellite television and platforms IPTV delivery; at the same time, use the service model terrestrial delivery with transmitters to the air. Coding advanced (usually H.264 but also VC1) and the multiplexing, represent the compression techniques of video that allows digital TV providers offer more channels to the consumer.
Television transmitters land enjoy a kind of rebirth thanks to the new installations of television transmission networks mobile. Latin America is at a very early stage of the interest in mobile television and, like other regions, you have the possibility to test various standards of transmission. The main options at this point seem to be MPH (Mobil Pedestrian Handheld), a television standard in-band mobile led by the chains that are already within the ATSC standard; DVB-H, a television extension Mobile STANDARD DVB-T terrestrial television, adopted by many regions of the world, and FLO, a multicasting technology developed by Qualcomm's MediaFLO business unit. Meanwhile, other standards such as T-DMB (an extension of the DAB standard) show interest in certain regions, but not they seem to have strength internationally. T-DMB transmitters are specifically designed to pass radio channels digital along with tv programming, and this has aroused some interest in Mexico, by the amount of stations belonging to the large media groups of the country. The fact that this standard is very popular in the area Asia-Pacific (as of May 2007 there were already 6.45 million users in South Korea; T-DMB was also confirmed as standard for the transmission of the Olympic Games of Beijing in 2008), means that the potential for the interest of consumers in Mexico is high, if the recipients are aimed at this market.
The standard for television Mobile In-Band MPH, developed by LG Electronics, Zenith and Harris aims to offer immediate value to broadcasters that use the ATSC standard for digital terrestrial television. In In the United States, LOCAL ATSC broadcasters can dedicate a slice of your 19.39 Mbps transport flow to start mobile services using the MPH standard. One ATSC local station with this amount of bandwidth can use 4.4 Mbps to transmit three wireless service channels to handheld devices using H.264 compression systems. This can represent a robust simulcasting service of the main HDTV signal of the channel, with local services (climate, traffic, sports) dedicated to a second channel especially designed, also leaving the door open for programming special on a third channel.
