Seminar Topics & Project Ideas On Computer Science Electronics Electrical Mechanical Engineering Civil MBA Medicine Nursing Science Physics Mathematics Chemistry ppt pdf doc presentation downloads and Abstract

Full Version: Direct To Home (DTH) Technology
You're currently viewing a stripped down version of our content. View the full version with proper formatting.
Direct To Home (DTH) Technology

[attachment=27033]

Though DBS and DTH present the same services to the consumers, there are some differences in the technical specifications. While DBS is used for transmitting signals from satellites at a particular frequency band [the band differs in each country], DTH is used for transmitting signals over a wide range of frequencies [normal frequencies including the KU and KA band]. The satellites used for the transmission of the DTH signals are not part of any international planned frequency band. DBS has changed its plans over the past few years so as to include new countries and also modify their mode of transmission from analog to digital. But DTH is more famous for its services in both the analog and digital services which includes both audio and video signals. The dishes used for this service is also very small in size. When it comes to commercial use, DBS is known for its service providing a group of free channels that are allowed for its targeted country.

DTH in India


India is one of the biggest DTH service providers in the world. The requirement is very high because of the high population and the increased number of viewers. The low cost of DTH when compared to other local cable providers is also one main reason for this substantial growth.


The idea of DTH was first provided to India in 1996. But it was not approved then as there were concerns about national security. But the laws were changed by the year 2000 and thus DTH was allowed. According to the new rule, DTH providers are required to set up new stations within 12 months of getting the license. The cost of the license is almost $2.15 million in India with a validity of 10 years for renewal. The latest reports suggest that almost 25% of the total Indian population use this facility while others use local TV connections.


Advantages of DTH Technolog\

The main advantage is that this technology is equally beneficial to everyone. As the process is wireless, this system can be used in all remote or urban areas.


Almost 4000 channels can be viewed along with 2000 radio channels. Thus the world¶s entire information including news and entertainment is available to you at home.

As there are no mediators, a complaint can be directly expressed to the provider.

With a single DTH service you will be able to use digital quality audio, video and also high speed broadband.














DIRECT TO HOME TECHNOLOGY (DTH)


[attachment=34967]

Introduction:

DTH-Direct To Home Technology is first introduced in the world by Japan in 1978.
Indian Government has permitted DTH Technology in 2001.
DTH Technology is introduced as Dish TV in 2003 in India.
It can provide internet, TV and radio channel, movie on demand etc. type facility.

CAS:

CAS in India
Advantages of CAS
For Customers
Channel Selection
For Broadcasters
No. of customers
For Advertisers
Popularity of channel
Opposition to CAS

Working:

Digital Video Broadcasting by Satellite (DVB-S)
Main three components used in DTH Technology:
DTH Base Station
DTH Satellite
Set-top box with Dish Antenna

DVB-S Transmission:

Data Coding : MPEG Coder
: Reed Solomon Coder
QPSK Modulation
Satellite Access Modes
SCPC
MCPC
Data Rate : MCPC → 20-30 MS/s
SCPC → 3 MS/s
Power Level : Effective Isotropic Radiated Power

DTH in World:

JAPAN has introduced DTH technology based on YURI satellite in 1978.
In U.S., Direc TV has implemented DTH communication in 1994.
In Europe, DTH is developed before cable and now controls nearly 80 percent of total television subscriber base. But in US, cable rules because it came before DTH.

DTH in India:

India has built INSAT series satellites from ISRO along with private operators.
INSAT-2E, INSAT-3C, INSAT-3E carry multiple channels for Indian television viewers.
DTH service is providing Doordarshan, ZEE Entertainment, STAR TV & Sony Television.
The cable system is well entrenched in India and is showing quite rapid growth. If DTH had come to India in 1996-97 then it could have made a significant breakthrough.

Conclusion:

The audio & video quality of DTH technology is vary high compared with cable TV.
DTH Service is available in remote area.
We have to pay for channels that we want to see.
Atmosphere can affect the broadcasting process in this technology.