 |
Business | Industries | Finance | Tax |
| Index: > A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
|
|||||
| First Prev [ 1 2 ] Next Last |
The standards can be obtained for free at the ETSI website after registration.
How the several DVB sub-standards interact is described in the DVB Cookbook (DVB-Cook).
The core standards of DVB are DVB-S ( satellite television and satellite internet), DVB-C ( cable) and DVB-T ( terrestrial), which are all based upon MPEG-2 (DVB-MPEG) for audio and video coding as well as the transport stream and are capable of high definition television (HDTV) as well. Upcoming is DVB-H for mobile reception in cellular phone frequency bands.
These flavors differ mainly in the modulations used, which is a required due to different bands. The high frequency DVB-S uses QPSK, lower hertz DVB-C uses QAM (64-QAM in general) and DVB-T (in VHF and/or UHF band) uses COFDM.
DVB-S and DVB-C were ratified in 19941994 is a common year starting on Saturday, and was designated the International year of the Family''. Events January events January 1 North American Free Trade Agreement (NAFTA) goes into effect January 6 Nancy Kerrigan is clubbed on the right leg by an. DVB-T was ratified in early 19971997 was a common year starting on Wednesday (see link for calendar), and was designated the International Year of the Reef''. Events January January 3 NBC's Today Show Bryant Gumbel signs off for the last time January 8 Mister Rogers receives a star on t. The first commercial DVB-T broadcasts were performed by the United KingdomThe United Kingdom of Great Britain and Northern Ireland is a state in Western Europe, usually known simply as the United Kingdom the UK Britain or less accurately as Great Britain . The UK was formed by a series of Acts of Union which united the formerly's Digital Terrestrial Group (DTG) in late 19981998 was a common year starting on Thursday (see link for calendar), and was designated the International Year of the Ocean''. Events January January 1998 A massive ice storm, caused by El Nino, strikes New England, southern Ontario and Quebec, resulting and in 20032003 is a common year starting on Wednesday (link will take you to calendar), and also: The International Year of Freshwater The European Disability Year Summary Perhaps the defining global event of the year 2003 was the Invasion of Iraq launched by the U Berlin, Germany was the first area to completely stop broadcasting analog TV signals. Italy will completely convert its terrestrial analog broadcasts to DVB-T by 2006.
Besides audio and video transmission, DVB also defines data connections (DVB-DATA) with return channels DVB-RC* for several media ( DECT, GSM, PSTN/ ISDN etc.) and protocolos (DVB-IPI: Internet Protocol, DVB-NPI: network protocol independent). This is for example used for interactive interfaces like Multimedia Home Platform (DVB-MHP) and Electronic Program Guide s (EPG).
Legacy technologies like teletext (DVB-TXT) and VBI (DVB-VBI) are also supported to ease conversion. However for many applications more advanced alternatives like DVB-SUB for sub-titling are available. The features are described with Service Information (DVB-SI).
| Politics | Business | Finance |
 |
 |
 |
|