Summer Training at Doordarshan Kendra Guwahati
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Transcript of Summer Training at Doordarshan Kendra Guwahati
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GOOD AFTERNOON
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SUMMER TRAINING AT DOORDARSHAN KENDRA
GUWAHATI
Presented ByShreya BoroRoll No. DC2010BTE4137ECE 7B
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IntroductionDoordarshan is the largest broadcasting
organization in India.It provides two free air channels DD-1 and DD News.It originates the programmes and telecast on channel.The experimental telecast was started on 15 September
1959 in Delhi.As a National Broadcaster came into existence in 1982.
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Various Sections of Doordarshan Kendra
1. Studio2. MSR3. ENG4. Editing5. Earth Station6. Transmitter7. Terrestrial transmission
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StudioTelevision signals for broadcasting are
originated by cameras ,recorded at the studios and replayed by video tape recorders, mixed in studio vision mixers and finally distributed for transmission.
Action in this includes staging, lightening, performance by artists .
Studios are acoustic treated to provide good quality of sound.
Very efficient air conditioning is required for the heat dissipation by the studio lights.
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Types of StudioMain StudioCB Studio
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Main StudioThis studio is mainly used for all major recordings and
live interactive program using Phone in console.This studio is fully digitalized with four camera setup. It is having different types of Microphone and equipped
with different lights including cool lights used as per production requirement.
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Main Studio
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Continuity Booth Studio(CB Studio)This studio is mainly used for live transmission of NEWS
programs.Some discussion type as well as anchoring
program is also generated from this studio.The size of CB studio is much smaller compared to the
main studio.
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CB Studio
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Teleprompter camera
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Master Switching RoomTechnical hub of
broadcast operation.It is the final point before
a signal is transmitted over-the-air for terrestrial television.
It includes video monitors, satellite receivers, transmission equipment etc.
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Block diagram showing position of MSR:Studio camera
PCR MSR
Earth station
Satellite
Terrestrial Transmitte
rAntennaTV
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ENGENG stands for electronic news gathering. The purpose of ENG is to gather news from different
outside locations. Cameras used in ENG section are small and light weight. These cameras are called camcoders.
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The cameras used in ENG have three sections :-
A camera lens and optics:- to form optical image
A transducer or pick up device:- to convert optical image into electrical signal.
Electronics:- to process the output of transducer.
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EditingThe process of correcting, altering, shortening etc to
prepare a programs for publication is known as Editing.There are two types of editing:
1. Linear Editing (LE)
2. Non-Linear Editing (NLE)
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Linear Editing
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Non linear editing:Video
Digitalize the video(AVI)
Capture Store in the
Gallery
Drag and drop clips in
timeline
Edit in time line
Making movie Point to tape
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Earth StationIt is the major section. Equipment operates in frequency range of 5.85Ghz to
6.42Ghz for transmit.For receiving 3.625Ghz to 4.2Ghz. The antenna consists of antenna control unit, receiver, up
convertor system, high power amplifier.Transmission system carries digital base band system
signals from studio to earth station site to minimize the noise interface.
For connectivity optical fiber is used.
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TransmitterDoordarshan Kendra, Guwahati has two (2) nos. of 10
KW solid state transmitters meant for terrestrial transmission.
The studio program is received by the transmitter through the satellite as well as microwave link.
The programme is relayed through the dielectric antennas installed on the 150 Mtr. (RCC + Steel) towers, which is a landmark civil structure in Guwahati city.
Diesel Generator sets are available for providing power to the transmitters in case of normal power failure.
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Terrestrial Transmission:It is a mode of television broadcasting which does not
involve satellite or cable rather it uses radio waves. Here the video is amplitude modulated and sound is
frequency modulated.Spectrum distribution: primarily 12 channels
Band I: 40-60 MHz(4 channels)
Band II: 88-108MHz(FM broadcasting)
Band III: 174-230 MHz(8 channels)
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Conclusion I am thankful to the in-plant training programme in-
charge of Doordarshan Kendra Guwahati for allowing me to do the training in their organization. I am also thankful to our TPO officer and the concerned staff of Department of electronics and communication engineering, DBCET for allowing me to participate in this training programme.
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THANK YOU & Have a nice
day