doordarshan akhileshwar

8/3/2019 doordarshan akhileshwar

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Doordarshan kendra serving an individual organizationwhich plays an important role in TVs cinema

It provides free to air channels DD-1,DD-NEWS and

many more It originates the programmes and telecast on the

channel Lucknow Doordarshan started functioning on 27th Nov.

1975 with an interim setup at 22, Ashok Marg, Lucknow.

The colour transmission service of National Channel(only with Transmitter) started from 15-8-82. While theregular colour transmission service from studio wasstarted in 1984 with ENG gadgets.



• STUDIO

• TRANSMITTER

• EARTH STATION

• ENG• NLE

• OB VAN



• Television signals for broadcasting are originated bycameras ,recorded at the studios and replayed by videotape recorders, mixed in studio vision mixers and finallydistributed for transmission.

• Action In this includes staging, lightening, performanceby artists .



• There are three different studios :-

Studio A

Studio B

Studio C

• Studio A is largest studio in comparison to B & C used formain recordings.

• Studio B is used for the live programme like discussions,news.



• Studio C is the last studio.

• It is used ocassionly.

• Studios are acoustic treated to provide good quality ofsound.

• Very efficient air conditioning is required for the heatdissipation by the studio lights.

• There is three setup of cameras in the studio A.

• Studio warning lights and safety devices like fire alarmsystem and fire fighting equipments.



• This stands for central apparatus room.• Car is basically a channel or path through which the

video signal pass.

• All studio has its own CCU ie. camera control unit.

• PCR ie panel control room• The no. or model of video consol is PDS 9000.



• Eng stands for electronic news gathering.

• The purpose of eng is to gather news from differentoutside locations.

• Cameras used in eng section are small and light weight.

• These cameras are called camcoders.



• 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.



• VTR room is provided at each studio center. It houses atleast two console type 1”videotape recorders (VTRs) and

a few Broadcast standard Videocassette recorders(VCRs). In these recorders, sound and video signals are

recorded simultaneously on the same tape.



• These are the VTR used to see the previews.

• Control panel is below them from where all the controlare managed



It is basically related to editing.

There are two types of editings.

1. Linear editing.

2. Non linear editing. Softwares used in non linear editing.

For news editing Velocity 6.0 is used.

For graphics MOV CG 2003 n Adobe photoshop.

For programme editing velocity 8.0 and FCP (final cutpro)



• Leatch server used in graphics section.

• It can record the programmes upto 24 hrs and more.

• With this leatch server we can play and record theprogrammes simultaneously.

• It consists of 3 recorders and players.

• Video logger is also used. Its can record the programmesupto 3 months.

• It is for making a backup any pro.



Problem with Linear Editing

1) Editing is sequential – first shot first

2) Long hours spent on rewinding of tapes

3) Potential risk of damage to original footage4) Difficult to insert a new shot in an edit

5) Difficult to experiment with Variations

6) Quality loss more in analog; even with digital

7) Limited Compositing, effects, color correction Capability



NLE is video editing in digital format with standardcomputer based technology Computer technology isharnessed in Random access, computational andmanipulation capability, multiple copies, intelligent

search, sophisticated project and media management

tools, standard interfaces, and powerful display .



• It is known as outdoor broadcasting van and used for

outer coverage.• Events like sports, functions are covered by this van.

• It consists of 8 cameras and 3 external sources and 4VTR.

• LSM:- LIVE SLOW MOTIN MACHINE. It is used to playthe replays in slow motion.

• There are also pc racks, mixers vtr racks.



• This is known as direct satellite news gathering.

• It works simultaneously with OB van.

• Its also called as mobile earth station.• The dish can be aligned acc to the requirement.

• Monitors are available in this van to check the telecast.

• High power ups are also available in this van.



• It is the major section.

• Epuipment operates in frequency range of 5.85Ghz to6.42Ghz for transmit.

• And for receiving 3.625Ghz to 4.2Ghz.• The antenna consists of lna, antenna control unit,

reciever, up convertor system, high power amplifier.



• Transmission system carries digital base band systemsignals from studio to earth station site to minimize the

noise interface.

• The base band system is monitered and control througha base band NMS PC.

• It also comprises of digital multiplexers and digital

modulators.

• The compression segment comprises of MPEG encodersfor providing redundancy.



• A fiber optics connectivity to two SDI video and two AES

audio signals.• System configured in mcpc(2+1) MODE.

• Base band processing fully digital inc I/P video and audiosignal

• Digital encodeing sys complaint to MPEG.

• Single point remote monitoring for video and audio.



Output from the switcher goes to stabilizing amplifier via PP andVDAs.

Output from the stab. Is further distributed to various destinations. Itmay be noted that the use of VDAs helps to monitor the videosignal at different locations and the use of PP is very helpful for

emergency arrangements during breakdowns and trouble shooting.

A separate monitoring bus is provided in CCU, LCU and ENDCONTROL with sources as.

END CONTROL also has a remote for the adjustment of levels etc.in the STAB AMP unit. R

out for the other sources is similar to this and can be understoodfrom the block schematic.

doordarshan akhileshwar

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