ddk(niraj) ppt on summer training from ddk patna

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Presentation On Training at DDK-PATNA Submitted By:- Niraj KUMAR E.C. (C-1) BBDIT

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Page 1: Ddk(niraj) ppt on summer training from ddk patna

Presentation On

Training at

DDK-PATNA

Submitted By:- Niraj KUMARE.C. (C-1)BBDIT

Page 2: Ddk(niraj) ppt on summer training from ddk patna

HISTORY

1. Doordarshan = Distant + Show 2. One of the largest broadcasting organizations in

India in terms of the infrastructure of studios and transmitters.

3. Doordarshan is a public broadcast terrestrial Channel run by Prasarbharati

4. Broadcasting started in India in the year 1923

5. 1st T.V Station was established in Delhi in 1959

6. T.V was separated from AIR in 19767. DD has 1500 Transmitters and 70 Production centers

across the Country.

Page 3: Ddk(niraj) ppt on summer training from ddk patna

INTRODUCTION

Broadcasting:

Process of sending information to a distant place is called Broadcasting.

Means of Broadcasting in India:1.Terrestrial 2.Satellite3.Internet

Both AIR & DD make use of both Terrestrial & satellite.

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OVERVIEW

INTRODUCTION

TV STUDIO

TRANSMISSION

Page 5: Ddk(niraj) ppt on summer training from ddk patna

Some facts about Doordarshan!!!

1.Directly works Under Government Policies .

2. India’s National TV Channel / wireless Broadcasting

Media ( DD National/ DD News / DD sports Etc. )

3. Free To Air Service provider.

4.Not in the race of TRP.

5.Program that comes have information as well as moral

values.

6.Always provide authentic news .

Page 6: Ddk(niraj) ppt on summer training from ddk patna

CONTENTS

1.Television Standard

2.Studio

3.Camera

1.Television Standard2.Studio3.Camera4.Television Lighting5.Acoustic System6.Vision Mixture7.MSR8.Transmitter9.Earth Station10.Process of Transmission

Page 7: Ddk(niraj) ppt on summer training from ddk patna

Television Standard

• NTSC-National television standards committee(US) (525 Horizontal & 60 vertical lines)

• SECAM-System electronics for colour avec memory (FRANCE)(625 vertical & 50horizantal lines)

• PAL- Phase Alternating lines(GERMANY)(625 horizontal & 50 vertical line)

Television standards used in India is PAL

Page 8: Ddk(niraj) ppt on summer training from ddk patna

PAL ENCODER & DECODER

•Input is the primary colour (i.e.

red, green, blue) into matrix circuit

as Y, R-Y, B-Y.

•Y=0.30R+0.59G+0.11B

•U=0.477(R-Y)

•V=0.895(B-Y)

•Out of 625 horizontal line only 575

are active

•50 vertical lines

Page 9: Ddk(niraj) ppt on summer training from ddk patna

Studio

A television studio is an installation in which

television or video productions take place by using several

supporting equipments

Page 10: Ddk(niraj) ppt on summer training from ddk patna

Type Of Studio

Studio A (Main)

Studio A requires four cameras.

Studio A is used for recording of programmes and other

activities.

Page 11: Ddk(niraj) ppt on summer training from ddk patna

Studio B (News)

Studio B requires two cameras.

Studio B is used for News recording & regional

transmission.

Page 12: Ddk(niraj) ppt on summer training from ddk patna

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 13: Ddk(niraj) ppt on summer training from ddk patna

Camera

A TV camera consist of three section.

Optical part - To form optical image.

Transducer - To convert optical image in to electrical

signal.

Electronic part - To process output of a transducer to

get a CCVS (colour composit video signal).

CCD Camera are used for recording

Page 14: Ddk(niraj) ppt on summer training from ddk patna

TELEVISION LIGHTING

Doordarshan studio has three basic

lights :-

Key light – This is the principal light

source of illumination. It is hard light which

provides shining on the front part of

objects.

Fill light – It controls the lighting

contrast by filling in shadows.

Back light – It separate the objects from

the background .

Page 15: Ddk(niraj) ppt on summer training from ddk patna
Page 16: Ddk(niraj) ppt on summer training from ddk patna

Acoustic System

It is derived from a Greek word “akoustos” which

means “hearing”.

It is use to prevent sounds from it’s echo.

In Doordarshan studio , all the sound must have

to be done Acoustic treatment to preserve the

originality of the sound along with extending

maximum pleasure to the listener.

Page 17: Ddk(niraj) ppt on summer training from ddk patna

Vision MixerA vision mixer 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 18: Ddk(niraj) ppt on summer training from ddk patna

Typical video chain

1-Use PAL system (720*576) in 4:3 aspect ratio.

2-For TV Transmission It uses VSM .

3-It Uses C Band( DTH uses Ku band) and in the transmitter

room it has two 10 KW Transmitters for Broadcasting.

Page 19: Ddk(niraj) ppt on summer training from ddk patna

MSR (Master switching Room)

• 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 20: Ddk(niraj) ppt on summer training from ddk patna

Camera control unit

CHARCTER

GENERATORS

CONTROL APPARATUS

ROOM

Includes the power

supply unit UPS room.

VIDEO TAPE RECORDER

Consists of recorded

materials i.e. v.c.R

Page 21: Ddk(niraj) ppt on summer training from ddk patna

TRANSMITTER

A television transmitter is a device which broadcasts an electromagnetic signal to the television receivers.

AlsoConnect earth station to satellites

Page 22: Ddk(niraj) ppt on summer training from ddk patna

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.

Page 23: Ddk(niraj) ppt on summer training from ddk patna

THE PROCESS OF TRANSMISSION

EARTHSTATION TANSMITTER/RECEIVER

SATELLITE

DTH

RECEIVER

TV

UPLINKING

DOWNLINKING

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Page 24: Ddk(niraj) ppt on summer training from ddk patna

Thank you…