PPT on Doordarshan
-
Upload
yashank-jain -
Category
Documents
-
view
324 -
download
2
Transcript of PPT on Doordarshan
![Page 1: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/1.jpg)
APRESENTATION
ON“DOORDARSHAN”
FORDOORDARSHAN KENDRA
, RAIPUR
SUBMITTED BY:Yashank Jain
![Page 2: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/2.jpg)
COMPANY PROFILE
DOORDARSHAN- Broadcasting Corporation of india.
• Head Office : Shankar Nagar,Raipur.
• Sr.Admin.Offiicer : Ms. M.S.Memon
• Assistant : Mr. B.K.Mohapatra
• Lib.Inf.asstt.: Mr. B.S Lalli
• Jaipur Station Engineer : Sh. M .s . rao
• Website: ddraipur.gov.in
![Page 3: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/3.jpg)
PROGRAMMES / SERVICES
• Awareness by means of – krishi darshan, Kalyani, Paramarsh, etc.
• Knowledge by means of – Khuli Charcha,bhuiyan ke goth etc.
• Entertainment by means of – Chitrahaar, Sanskriti Darpan & live Coverages of other activities, etc.
![Page 4: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/4.jpg)
CONTENTS
• INTRODUCTION• TV STUDIO• VISION MIXER• AUDIO/ VIDEO CHAINS• MSR • EARTH STATION• TV Tx• ANTENNAS & SATELLITES• OB VAN & DSNG• SETUP IN RAIPUR
![Page 5: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/5.jpg)
INTRODUCTION
To Broadcasting• A process of sending information to a
distant place is called Broadcasting.
• Means of Broadcasting in India: 1. Terrestrial 2. Satellite 3. Internet
• Both AIR & DD make use of both Terrestrial & satellite.
![Page 6: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/6.jpg)
cont...• Broadcasting of DD chhattisgarh started in the
year 2002.• Kendra telecasts programmes for 5 hrs.• 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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/7.jpg)
cont...• DD national has 1500 Transmitters and
70 Production centers across the Country.
• These centers are divided in 3 levels-
1. -National centers2. -Regional centers3. -Local centers
• transmission started on 20th sep. 1987.
![Page 8: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/8.jpg)
TV STUDIO
• A television studio is an installation in which television or video productions take place .
![Page 9: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/10.jpg)
VISION MIXER
• A vision mixer (also called video switcher, video mixer or production 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 input, any source can be taken as output.
• Sources can be changed as cut to cut, dissolve, wipe and other special effects.
![Page 11: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/11.jpg)
TYPICAL VIDEO CHAIN
TYPICAL AUDIO CHAIN
DistributorVision Mixer LOGOGenerator
Earth station through
Optical Fiber
STLLink
Sources
DistributorAudio Console
Analog to Advanced
Encryption StandardConverter
Earth station through
Optical Fiber
Sources
STL Link
![Page 12: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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) Analog, 2) Digital
• Digital Earth Stations are widely used because of various advantages over analog.
![Page 14: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/15.jpg)
Types of TV Transmitters
• VLPT’s, LPT’s & HPT’s
• A 10 KW HPT of Raipur zone is situated at Shankar nagar raipur.
• 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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/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: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/19.jpg)
OB VAN
![Page 20: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/20.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 21: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/21.jpg)
DD Setup In Raipur
• Satellite - INSAT-3C, 740 E• Transponder – C24Parameters: • Symbol rate – 4.25 MSPS, • Downlink Freq. – 4166.50 MHz, • FEC – ¾, • Polarisation D/L – Vertical, Linear. Equipments -• Encoder (E5411), Modulator (SM600), Multiplexer (Mx5620) – Two nos. each (Tandberg make) in 1+1 Mode• Up Converter (Advent) - Two• 700 W HPA (Xicom) – Two• Network Management PC
![Page 22: PPT on Doordarshan](https://reader036.fdocuments.in/reader036/viewer/2022081717/553319834a7959e6558b47dd/html5/thumbnails/22.jpg)
Thank You
• Any Queries?