Gw mau tau Transmisi dari DVB. Jelasin dalam bahasa sunda

Sistim DVB nyebarkeun data maké sababaraha cara, kaasup ngaliwatan satelit (DVB-S, DVB-S2 katut DVB-SH; ogé DVB-SMATV keur distribusi ngaliwatan SMATV); kabel (DVB-C); televisi téréstrial (DVB-T) jeung televisi téréstrial digital keur handheld (DVB-H); sarta ngaliwatan gelombang mikro maké DTT (DVB-MT), MMDS (DVB-MC), jeung/atawa standar MVDS (DVB-MS)

These standards define the physical layer and data link layer of the distribution system. Devices interact with the physical layer via a synchronous parallel interface (SPI), synchronous serial interface (SSI), or asynchronous serial interface (ASI). All data is transmitted in MPEG-2 transport streams with some additional constraints (DVB-MPEG). A standard for temporally compressed distribution to mobile devices (DVB-H) was published in November 2004.

These distribution systems differ mainly in the modulation schemes used, due to the different technical constraints. DVB-S (SHF) uses QPSK, 8PSK or 16-QAM. DVB-S2 uses QPSK, 8PSK, 16APSK or 32APSK, at the broadcasters decision. QPSK and 8PSK are the only versions regularly used. DVB-C (VHF/UHF) uses QAM: 16-QAM, 32-QAM, 64-QAM, 128-QAM or 256-QAM. Lastly, DVB-T (VHF/UHF) uses 16-QAM or 64-QAM (or QPSK) in combination with COFDM and hierarchical modulation