I need Information about Digital Video Broadcasting ..?
I need Information about Digital Video Broadcasting ..?
(OP)
Hi everyone,
I am working on Video Broadcasting Satellites.
I want to know
1)signal charactreistics of uplink & downlink
2)characteristics of earth station
3)how astellite transponder works
I have elementary information about topics above and I need more detail such as:
1)exact modulation and multiplexing of signals
2)geographical information about earth stations
and ....
thank u
I am working on Video Broadcasting Satellites.
I want to know
1)signal charactreistics of uplink & downlink
2)characteristics of earth station
3)how astellite transponder works
I have elementary information about topics above and I need more detail such as:
1)exact modulation and multiplexing of signals
2)geographical information about earth stations
and ....
thank u





RE: I need Information about Digital Video Broadcasting ..?
RE: I need Information about Digital Video Broadcasting ..?
I wanted to know that why is QPSK modulation with Convolutional and Reed-Solomon Coding used ?
and why is not SCPC used ?
RE: I need Information about Digital Video Broadcasting ..?
RE: I need Information about Digital Video Broadcasting ..?
You said that bit rate required for NTSC quality TV is 4 Mbps per channel.I wanted to know if HDTV quality is used for TV broadcasting and I have read in Europian standards that bitrate required for HDTV is 20 - 40 Mbps.
Can you reffer me to somewhere in the www that I could find more about satellite video broadcasting and standards that are used ?
RE: I need Information about Digital Video Broadcasting ..?
RE: I need Information about Digital Video Broadcasting ..?
RE: I need Information about Digital Video Broadcasting ..?
RE: I need Information about Digital Video Broadcasting ..?
It was very useful.
Here comes another question.
the question is that :
how geographically different Earth Stations can transmit their data to one transponder of a TV broadcasting satellite ?
In other words What is Multiple Access of TV broadcasting satellites?
Because I've seen different TV programs with one center frequency of a satellite transponder , and I know that the earth stations of these TV channels is far from each other so they cannot transmit their video from one place to a specific transponder.
Finally the information in www is very general and I have not found detailed info.
thank u for ur help.