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Digital Video Broadcasting – Terrestrial (DVB-T) is a standard set in 1997 and put into use in 1998 for the transmission of digital terrestrial television (DTT). DVB-T is able to transmit different kinds of data, including compressed digital information, digital audio, digital video, Moving Picture Experts Group (MPEG) and other data with codec modulation. DVB-T provides an advanced method of transmission compared to the previous analog transmission.
Techopedia Explains Digital Video Broadcasting – Terrestrial
In the present age, television transmissions are broadcast from towers and then beamed to homes via receivers passing through satellites. This provides easy and reliable satellite-based transmission. But this is not the only method used for television broadcast.
Many countries have implemented DVB-T, which has reformed into many other standards such as DVB-H and DVB-T2.
The working mechanism of DVB-T involves the following:
- Digital data is transmitted in discrete blocks at symbol rate.
- DVB-T allows for the handling of multipath scenarios through the orthogonal-frequency-division-multiplexing technique.
- Single-frequency network operation is also used by DVB-T, where two or more transmitters may carry the same data at the same frequency.
DVB-T has many features that play an active role in operational management. Some of these features include:
- Splitter
- External encoder
- External interleaver
- Internal encoder
- Mapper
- Frame adaption
- Pilot and transmission parameters signals
