各国数字电视标准

Country Multiplexes

Operational Bands Carrier type Guard

interval FEC

Modulation

Reception

model

MFN and SFN Max.

transmitter ERP Middleware

Channel bandwidth Australia 5mostly 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 3/416QAM

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.

to compete with cable

SFN MHP reported

as being tested

8MHz Denmark

4 planned,one initially

UHF

8k

1/4

3/4

64QAM

SDTV

MFN with SFN

50kW

MHP

8MHz

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

In 2000 CDG and the traditional broadcast network operator, Ceské 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.

February 2004 is the next milestone for the possible governmental acceptance of the DTT strategy in Czech Republic. CDG and its owners are planning for a DTT roll out in early 2004Czech Republic

各国数字电视标准

Estonia one initially UHF 8k 1/8 2/364QAM Freeview initially. Re-bcast analogue

MFN

MHP planned 8MHz Faroe Islands 4UHF 8k 1/8 3/464QAM replacement for

analogue

MFN

400 Watts 8MHz

Finland 3

UHF

8k

1/8

2/3

64QAM

Freeview SDTV MFN

50kW

MHP 8MHz

France Germany

4 initially

UHF and VHF 8k 1/8

2/3 & 3/416QAM indoor, mobile & fixed SFN & MFN 10kW VHF,120kW UHF MHP being adopted 8MHz UHF &

7MHz VHF

Hungary

3-6 planned, 1

during trial

UHF

8k

8MHz Italy 5 (2004)UHF and VHF

8k

2/3 for UHF,3/4 for VHF

64QAM

Free view and pay chanels

MFN MHP

UHF/8MHz,VHF/7MHz (8MHZ planned for VHF later)

Iran Ireland 6

UHF

8k

Freeview and

pay

8MHz

Latvia

6 planned

UHF

8k

64QAM

MHP

8MHz

Luxembour g

8k

2/3

64QAM

SFN

2kW

Israel It is expected that four multiplexes will be allowed carrying around 20 programmes in Vilnius by the end of 2005. Klaipeda and Kaunas should also be covered with the same multiplexes by the end of 2006 with other major cities following by the end of 2007.

France will use 8k with 64QAM modulation in Bands 4 & 5

India chose the DVB-T standard for Terrestrial Digital Broadcasting in July 1999 after 18 months of study and testing.

The state broadcaster Doordarshan started a pilot trial in Delhi during 2002 which is extending to Calcutta, Mumbai and Chenai.India A joint field trial using Bezeqs two existing DVB-T test transmitters will take place during the first half of 2004 enabling it and content providers to learn digital broadcast technology.DV BT

It was reported that DTT planning by the Greek Administration began last year with the priority being to cover the Attiki region around Athens which would immediately cover 50% of the population.

This will also be a pilot project to define a network for the rest of Greece using both SFN and MFN networks.Greece

Lithuania Iran chose DVB-T as its terrestrial digital TV system after extensive technical study.