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Doordarshan Kendra Thiruvananthapuram | Monday, 25 May 2015
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DTH

Direct-to-Home (DTH) satellite television is becoming a buzzword in the satellite Click here to View Enlarged Picturebroadcast industry due to the fact that DTH offers immense opportunities to both broadcasters and viewers. Thanks to the rapid development of digital technology, DTH broadcast operators worldwide have been able to introduce a large number of new interactive applications in the television market besides a large number of entertainment programmes over a single delivery platform. In addition, since digital technology permits a highly efficient exploitation of the frequency spectrum, the number of TV channels that can be broadcast using digital technology is significantly higher than with analogue technology. The increased number of television channels allows the operator to satisfy the demand of a number of niche markets with dedicated transmissions.

In general, DTH service is the one in which a large number of channels are digitally compressed, encrypted and beamed from very high power satellites. The programmes can be directly received at homes. This mode of reception facilitates the use of small receive dish antennas of 45 to 60 cm diameter installed at convenient location in individual buildings without needing elaborate foundation /space etc. Also, DTH transmission eliminates local cable operator completely, since an individual user is directly connected to the service providers. However, a digital receiver is needed to receive the multiplexed signals and view them on a TV. DTH, in sharp contrast to Cable TV, lends itself to easy monitoring and control.

Transmission in Ku band is most appropriate and widely used for the purpose. As mentioned above, all the encoded transmission signals are digital - thus providing higher resolution picture quality and better audio than traditional analog signals. All the advantages of the digital transmission, as applicable to the terrestrial transmission are relevant in the satellite transmission also.


DOWNLINK  PARAMETERS OF DD-KERALAM/DD MALAYALAM DTH SERVICE


SATELLITE
INSAT 4B
LOOKING ANGLE

93.5 Degree East

DOWNLINK FREQUENCIES

             10990 MHz     Vertical
              11150 MHz     Vertical
                        11490 MHZ     Vertical
                        11570 MHZ     Vertical
SYMBOL RATE
27500 KSPS or 27.5 MSPS
FEC
¾



For more details visit http://www.ddinews.com/DTH/DDDIRECT 

Direct-to-Home (DTH) satellite television is becoming a buzzword in the satellite broadcast industry due to the fact that DTH offers immense opportunities to both broadcasters and viewers. Thanks to the rapid development of digital technology, DTH broadcast operators worldwide have been able to introduce a large number of new interactive applications in the television market besides a large number of entertainment programmes over a single delivery platform. In addition, since digital technology permits a highly efficient exploitation of the frequency spectrum, the number of TV channels that can be broadcast using digital technology is significantly higher than with analogue technology. The increased number of television channels allows the operator to satisfy the demand of a number of niche markets with dedicated transmissions.

In general, DTH service is the one in which a large number of channels are digitally compressed, encrypted and beamed from very high power satellites. The programmes can be directly received at homes. This mode of reception facilitates the use of small receive dish antennas of 45 to 60 cm diameter installed at convenient location in individual buildings without needing elaborate foundation /space etc. Also, DTH transmission eliminates local cable operator completely, since an individual user is directly connected to the service providers. However, a digital receiver is needed to receive the multiplexed signals and view them on a TV. DTH, in sharp contrast to Cable TV, lends itself to easy monitoring and control.

Transmission in Ku band is most appropriate and widely used for the purpose. As mentioned above, all the encoded transmission signals are digital - thus providing higher resolution picture quality and better audio than traditional analog signals. All the advantages of the digital transmission, as applicable to the terrestrial transmission are relevant in the satellite transmission also.


DOWNLINK  PARAMETERS OF DD-KERALAM/DD MALAYALAM DTH SERVICE


SATELLITE
INSAT 4B
LOOKING ANGLE
93.5 Degree East
 DOWNLINK FREQUENCIES             10990 MHz     Vertical
              11150 MHz     Vertical
                        11490 MHZ     Vertical
                        11570 MHZ     Vertical
SYMBOL RATE27500 KSPS or 27.5 MSPS
FEC¾

For more details visit http://www.ddinews.com/DTH/DDDIRECT 

 
 
   
     

 
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