doordarshan
TRANSCRIPT
![Page 1: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/1.jpg)
ASeminar
On “DOORDARSHAN”
Taken At DOORDARSHAN KENDRA , JAIPUR
SUBMITTED BY:ASHISH JAISWALIV Yr. ECE (014)
GUIDED BY:Prof. (Dr.) A. WILLIAMSONDean & H.O.D
http://powerpointpresentationon.blogspot.com
![Page 2: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/2.jpg)
COMPANY PROFILE
• DOORDARSHAN- Broadcasting Corporation of india.
• Head Office : Copernicus Marg, New Delhi.• Dir. General : Ms. Aruna Sharma• Engineer -in- Chief : Mr. R.R. Prasad• Chief Executive Officer: Mr. B.S Lalli• Jaipur Station Engineer : Mr. R.S. Tyagi• Website: www.ddindia.com
![Page 3: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/3.jpg)
AIM / SERVICES
• Awareness by means of – krishi darshan, Kalyani, Paramarsh, etc.
• Knowledge by means of – Prashnotri, Khuli Charcha, etc.
• Entertainment by means of – Chitrahaar, Sanskriti Darpan & live Coverages of other activities, etc.
![Page 4: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/4.jpg)
CONTENTS• Introduction• TV STUDIO• VISION MIXER• AUDIO/ VIDEO CHAINS• MSR • EARTHSTATION• TV Tx• ANTENNAS & SATELLITES• OB VAN & DSNG• SETUP IN RAJASTHAN
![Page 5: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/5.jpg)
INTRODUCTION
To Broadcasting• A process of sending information to a distant
place is called Broadcasting.• Need ?• Means of Broadcasting in India:
1. Terrestrial 2. Satellite3. Internet• Both AIR & DD make use of both Terrestrial &
satellite.
![Page 6: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/6.jpg)
• Intro cont...• Broadcasting started in India in the year
1923.• AIR was formed in the year 1936.• In 1947, AIR was covering 2.5% & about
11% of land & population respectively.• 1st T.V Station was established in Delhi in
1959• T.V was separated from AIR in 1976
![Page 7: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/7.jpg)
• Intro cont...• DD has 1500 Transmitters and 70
Production centers across the Country.• These centers are divided in 3 levels-National centers-Regional centers-Local centers • On 1st June 1987, Jaipur Doordarshan
Kendra was set up at Jhalana Doongri and transmission started on 6th July 1987.
![Page 8: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/8.jpg)
TV STUDIO
• A television studio is an installation in which television or video productions take place .
![Page 9: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/9.jpg)
COMPONENTS OF TV STUDIO
• Camera• Lighting• Microphones• Vision mixer and Audio consoles• MSR• VTR• Acoustics• Post production and video effects• Supporting services like AC, UPS
![Page 10: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/10.jpg)
VISION MIXER• A vision mixer (also called video
switcher, video mixer orproduction switcher) is a device used to select between several different video sources and in some cases mix video sources together and add special effects.
• It has many input sources such as cameras, VCR/ server, Graphics/Character Generators,etc.
• Out of these i/p, any source can be taken as o/p.
• Sources can be changed as cut to cut, dissolve, wipe and other special effects.
![Page 11: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/11.jpg)
TYPICAL VIDEO CHAIN
TYPICAL AUDIO CHAIN
DistributorVision Mixer LOGOGenerator
Earth station through
Optical Fiber
STLLink
Sources
DistributorAudio Console
Analog to AES
Converter
Earth station through
Optical Fiber
Sources
STL Link
![Page 12: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/12.jpg)
MSR
• It is the heart of the studio.• Most of the switching
electronics is kept e.g. camera base stations, switcher main frame, SPG, Satellite receivers, MW link, DDA & most of the patch panels.
• Signal is routed through MSR.• Signal can be Monitored at
various stages
![Page 13: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/13.jpg)
EARTH STATION• Earth Station is a very important part of satellite
communication system for broadcasting of signals.
• It is an uplink center from which the signals are fed to Satellite for distribution in a specified area covered by the Satellite.
• The signal is up-linked from the Earth Station and received by many down link centers in TV broad casting via PDA.
• Two Types: 1) Analog2) Digital• Digital Earth Stations are widely used because of
various advantages over analog.
![Page 14: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/14.jpg)
Major Components of Digital Earth Station
• PDA (Parabolic Dish Antenna)• FEED• Wave Guide / Low Loss Cable• HPA (TWTA, Klystrons)• Up converter• Modulator• Encoder• Multiplexer• IRD (Integrated Receiver Decoder)
![Page 15: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/15.jpg)
Types of TV Transmitters • VLPT’s, LPT’s & HPT’s• A 10 KW HPT of Jaipur zone is
situated at the highest mountain peak i.e Nahargarh.
• It is only 10-20% efficient.• It has beamwidth of 360 deg,
hence can cover upto 65 kms of area around it.
• It has various other supporting units with it to maintain the quality of s/g to be Txd. Like- Monitoring section, blower section, amplification section
![Page 16: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/16.jpg)
Antennas & Satellites• An antenna (or aerial) is a transducer
designed to transmit or receive electromagnetic waves. In other words, antennas convert electromagnetic waves into electrical currents and vice versa.
Electromagnetic waveElectrical signal
Transmitting Antenna
Receiving Antenna
![Page 17: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/17.jpg)
TYPES
• Isotropic antenna (idealized)o Radiates power equally in all
directions• Dipole antennas
o Half-wave dipole antenna (or Hertz antenna)
o Quarter-wave vertical antenna (or Marconi antenna)
• Parabolic Dish / Reflective Antenna
![Page 18: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/18.jpg)
OB Van & DSNG
• A typical OB Van is usually divided into 4 parts.
• The first and largest part is the production area or sitting area for all directors & producers.
• The second part of a van is for the audio engineer.
• The 3rd part of the van is video tape
![Page 19: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/19.jpg)
• The 4th part is transmission where the signal is monitored by and engineered for quality control purposes and is transmitted or sent to other trucks.
• DSNG is a portable uplinking centre.
![Page 20: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/20.jpg)
DD Setup In Rajasthan• Modes-
-Terrestrial (Area coverage – 72%)-Satellite (Area coverage – 100%)• Transmitters - 90• Satellite – INSAT• Transponder used - C-6• Satellite Position - 93.5’ E• Uplinking frequency – 6165.5 MHz• Downlinking frequency – 3940.5 MHz• Modulation Scheme - QPSK
![Page 21: doordarshan](https://reader033.vdocuments.site/reader033/viewer/2022061123/5476b306b4af9faa498b457c/html5/thumbnails/21.jpg)
Thank You
Any Queries?