DVB

Source: Wikipedia. Pages: 31. Chapters: Digital Video Broadcasting, DVB-T2, DVB-H, Common Interface, DVB 3D-TV, DVB-SH, DVB-S2, DVB-C2, Multimedia Home Platform, DVB-RCT, DVB-RCS, DVB-CPCM, Globally Executable MHP, Common Scrambling Algorithm, BBC Research, Control System Middleware for operator functioning, Data and object Carousel, Radio with Pictures system for use with DVB, Conditional-access module, IP over DVB, DVB-HTML, DVB-IPTV, Generic Stream. Excerpt: DVB-T2 is an abbreviation for Digital Video Broadcasting ¿ Second Generation Terrestrial; it is the extension of the television standard DVB-T, issued by the consortium DVB, devised for the broadcast transmission of digital terrestrial television. This system transmits compressed digital audio, video, and other data in "physical layer pipes" (PLPs), using OFDM modulation with concatenated channel coding and interleaving. The higher offered bit rate, with respect to its predecessor DVB-T, makes it a suited system for carrying HDTV signals on the terrestrial TV channel (though many broadcasters still use plain DVB-T for this purpose). It is currently broadcasting in UK (Freeview HD, four channels), Italy (Europa 7 HD, twelve channels) and since November 1, 2010 in Sweden (five channels). In March 2006 DVB decided to study options for an upgraded DVB-T standard. In June 2006, a formal study group named TM-T2 (Technical Module on Next Generation DVB-T) was established by the DVB Group to develop an advanced modulation scheme that could be adopted by a second generation digital terrestrial television standard, to be named DVB-T2. According to the commercial requirements and call for technologies issued in April 2007, the first phase of DVB-T2 would be devoted to provide optimum reception for stationary (fixed) and portable receivers (i.e., units which can be nomadic, but not fully mobile) using existing aerials, whereas a second and third phase would study methods to deliver higher payloads (with new aerials) and the mobile reception issue. The novel system should provide a minimum 30% increase in payload, under similar channel conditions already used for DVB-T. The BBC, ITV, Channel 4 and Five agreed with the regulator Ofcom to convert one UK multiplex (B, or PSB3) to DVB-T2 to increase capacity for HDTV via DTT. They expected the first TV region to use the new standard would be Granada in November 2009 (with existing switched over regions being changed at the same time