各国数字电视标准.xls

各国数字电视标准各国在卫星/有线数字电视标准大多采用欧洲标准 DVBS 和 DVBC ,对于复杂的地面广播数字电视标准,国际上有三大标准, DVBT , ATSC , ISDB -T,大多数国家采用的是 DVBT ,以下对各国的地面广播数字电视标准做了一个简单的汇总 DV BT Country Multiplexes Operational Bands Carrier type Guard interval FEC Modulation Reception model MFN and SFN Max. transmitter ERP Middleware Channel bandwidth Australia 5 mostly VHF, some UHF 8k 1/16 & 1/8 for 3/4 & 2/3 FEC 3/4 and 2/3 64QAM HDTV and SDTV both MFN and SFN 30kW VHF & 200kW UHF MHP 7MHz for both VHF and UHF Austria 1 during the trial in Graz UHF 8k 1/8 3/4 16QAM indoor, portable & fixed SFN being used for trial MHP with UMTS & telephone return being used in the trial 8MHz Belgium 3-5 planned UHF 8k 1/8 3/4 indoor rod ant. pete with cable SFN MHP reported as being tested 8MHz Czech Republic In 2000 CDG and the traditional work operator, Cesk é Radiokomunikace (CRa), each launched DTT test projects in Prague to speed up DTT in the Czech Republic. The CDG DTT project covers two transmitters on existing television towers in the city. Both of these projects cover territory around fifty kilometres from the centre of Prague. Since 2000 there has been a multitude of tests carried out, including MHP interactive services, to prove the reliability of digital transmissions. There are currently four CDG channels on air, five CRa channels and three radio channels on each of the two multiplexes, some carrying demonstrations of MHP services.