DOORDARSHAN PRESENTATION + project on sdtv hdtv
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Transcript of DOORDARSHAN PRESENTATION + project on sdtv hdtv
Industrial Training presentation on
DOORDARSHAN(HDTV AND SDTV)
PRESENTED BY:
R ASHOK KUMARAVLEEN KAUR GREWAL
ARUN KUMARSANDEEP AGGARWALECE-2 7TH SEMESTER
GURU TEGH BAHADUR INSTITUE OF TECHNOLOGY
The head office is located at Doordarshan Kendra, Mandi house, New Delhi.
LARGEST BROADCASTING ORGANISATION
1st service started on 15th Sep,1959
Doordarshan = Distant + Show
Doordarshan is an Indian public service broadcaster.
INTRODUCTION
MAJOR UNITS
• Television studio• Production Control Unit (PCR)• Master Switching Room (MSR)• Earth Station• OB & DSNG VAN
TELEVISION STUDIO
• A television studio is an installation in which television or video productions take place.
• Doordarshan-Delhi has four studio halls: Studio Big (B) Studio Small (S) Studio Medium (M) Studio Large (L)
COMPONENTS OF TV STUDIO
• Camera• Lighting• Microphones• Vision mixer and
Audio consoles• MSR• VTR• Supporting services
like AC, UPS
• Activities in this area are:- Direction to the production crew by the producer Timing a production/telecast Editing Monitoring of output/off air signal
Production Control Room
• Monitor Program And
Graphics• Vision Mixer
(to select video sources)• Audio Mixer• Linear and Non-Linear editing
Vision Mixer
• Audio Mixer
Components of PCR
Master Switching Room
• It is the heart of the studio.• Signal is routed through MSR from various various to
Earth station.• Signal can be Monitored at various stages.
• Router (64 X 64)• Audio/Video Switcher• OFC Rack• Frame Synchroniser• DVDs and AVDs• D/A and A/D converters• SPG• IRDs
Equipments Installed
EARTH STATION• An earth station is
a terrestrial terminal station.
• Designed for transmission and reception of radio waves from an astronomical radio source.
• The signal is up-linked from the Earth Station and received by many down link centers in TV broad casting via satellites.
• PDA (Parabolic Dish Antenna)• FEED• Wave Guide / Low Loss Cable• HPA (TWTA, Klystrons)• Up converter• Modulator• Encoder• Multiplexer• IRD (Integrated Receiver Decoder)
Major Components of Digital Earth Station
WORKING OF EARTH STATION
OB VAN
• Outside broadcasting (OB) is the production of television or radio programmes from a mobile remote broadcast television studio.
• It is also known as mobile PCR.
• OB Van is equipped with: 8 numbers of Digital CCD cameras 16 input vision mixer and 16 audio mixer . One computerized MOVE CG for superimposing titles. Long haul microwave link is also available with OB.
DSNG VAN• It stands for Digital System
News Gathering and it operates along the OB van.
• It is also known as mobile Earth Station.
• The DSNG Van is equipped with:
Encoder Up converters / down
converters Baseband equipments
SDTV & HDTVPROJECT ALLOTTED
STANDARD DEFINITION TELEVISION (SDTV)
• SDTV in widescreen format provide Enhancements Multichanneling Eliminate errors found in analog
transmissions
• Aspect ratio- 4:3 or 16:9
• Little bit higher state of resolution than 'analog television system‘
• The two common SDTV signal types 576i 480i
CLARITY
• HDTV in widescreen format provide Closest to cinema quality Dolby surround sound
• Aspect ratio- 16:9
• Significant higher resolution than 'analog television system
• The three common SDTV signal types 720p 1080i 1080p
HIGH DEFINITION TELEVISION (HDTV)
RESOLUTION
SDTV VS HDTV
SDTV HDTV HDTV HDTV
WIDTH/SCAN 480i 720p 1080i 1080p
RESOLUTION 640x480 1280x720 1920x1080 1920x1080
RATIO 4:3 16:9 16:9 16:9
COLORS Limited Wide range Wide range Wide range
AUDIO Standard Dolby surround
Dolby surround
Dolby Surround
SDTVMerits:• More vivid than analog
TV • It has better sound.• Many accompanying
functions like multitasking, electronic program guide etc
Demerits:• Lower resolution than
HDTV
MERITS AND DEMERITSHDTVMerits:• Twice the linear resolution
of SDTV• Increases effective image
resolution
Demerits:• Require more bandwidth• Distorted pictures due to
lossy compression
THANKYOU