Everything You Need to Know About DTH ||
How Works DTH ?? || Techinfo365.in
Everything You Need
to Know About DTH || How Works DTH ?? || Techinfo365.in
DTH (Direct-to-Home)
is a digital satellite television broadcasting technology that allows for the
transmission of television signals directly to subscribers’ homes using
satellite communication. Here’s how DTH works:
.png "A satellite dish receiving signals from a satellite, symbolizing Direct-to-Home (DTH) broadcasting for television content delivered directly to homes.")
- Satellite Uplink :
- Satellite Transmission :
- Transponder :
- Dish Antenna :
- Low-Noise Block Downconverter (LNB) :
- Set-Top Box (STB) :
- Television Display :
Everything You Need to Know About DTH || How Works DTH ?? || Techinfo365.in
Satellite
Uplink
.png "A satellite dish transmitting signals to a satellite in space, symbolizing a satellite uplink for data or communication transmission to orbiting satellites.")
1. Satellite Uplink: TV channels and programs are transmitted by broadcasters to a
satellite using an uplink facility. The uplink facility converts the video and
audio signals into a suitable format for satellite transmission.
Everything
You Need to Know About DTH || How Works DTH ?? || Techinfo365.in
Satellite Transmission
.png "A satellite in space beaming signals to Earth, symbolizing satellite transmission for communication, broadcasting, or data transfer.")
2.
Satellite
Transmission: The uplinked signals are then transmitted to a geostationary
satellite in orbit around the Earth. Geostationary satellites remain fixed
relative to a specific location on Earth, which allows for continuous
transmission and reception.
Transponder
.png "A device with incoming and outgoing signals, symbolizing a transponder used for receiving, amplifying, and retransmitting signals in satellite communication or radar systems.")
3.
Transponder: The satellite
receives the signals and amplifies them before retransmitting them back to
Earth. The satellite is equipped with multiple transponders, which are
essentially communication channels that receive signals from one frequency and
retransmit them on another frequency.
Dish Antenna
.png "A large curved satellite dish antenna, pointed towards the sky, symbolizing a dish antenna used for receiving or transmitting satellite signals.")
4.
Dish Antenna: To receive the
satellite signals, subscribers need to install a DTH dish antenna on their
premises. The dish antenna is pointed towards the specific satellite that
broadcasts the desired TV channels. The size and type of dish antenna depend on
the satellite’s coverage area and signal strength requirements.
Low-Noise Block Downconverter (LNB)
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%20a.png "A small device attached to a satellite dish, receiving signals and converting them to a lower frequency, symbolizing a Low-Noise Block Downconverter (LNB) used in satellite communication")
.jpg "A small device attached to a satellite dish, receiving signals and converting them to a lower frequency, symbolizing a Low-Noise Block Downconverter (LNB) used in satellite communication")
5.
Low-Noise Block
Downconverter (LNB): The dish antenna collects the signals from the satellite and
focuses them onto a device called the LNB. The LNB amplifies and converts the
high-frequency satellite signals into a lower frequency range, making them
suitable for further processing.
Set-Top Box (STB)
.png "A small electronic device connected to a television, displaying various input and output ports, symbolizing a Set-Top Box used for receiving and decoding broadcast signals")
6.
Set-Top Box (STB): The converted
signals from the LNB are then connected to a set-top box, which acts as an
interface between the dish antenna and the subscriber’s television. The set-top
box decodes the received signals, extracts the video and audio content, and
sends them to the television for display.
Television Display
.png "A television screen displaying colorful images or video content, symbolizing a television display for visual entertainment.")
7.
Television Display: The decoded video
and audio signals from the set-top box are sent to the television, allowing
subscribers to view the channels and programs on their TV screens. The set-top
box also provides additional features like electronic program guides,
interactive services, and channel customization options.
Subscriber Authorization
.png "A user ID and password fields with a checkmark or key symbol, symbolizing subscriber authorization for accessing protected services or content.")
8.
Subscriber
Authorization: DTH service providers typically use conditional access systems
to control subscriber access to specific channels or pay-per-view content.
Subscribers are provided with smart cards or other authentication mechanisms
that need to be inserted into the set-top box for authorization.
Two-Way Communication
9.
Two-Way
Communication: In some cases, DTH systems support two-way communication,
enabling interactive services like video-on-demand, pay-per-view, and
interactive gaming. These systems utilize additional equipment such as a return
path transmitter and a broadband connection to facilitate the two-way data
exchange.
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