final doordarshan ppt
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8/19/2019 Final Doordarshan PPT
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Training at DDK, Mandi
House
1
Presented by-
Ashwani Kumar Saxena(07614802810)
Prakhar u!ta(07714802810)
7"#"4$6
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Contents
• About Doordarshan• Production Chain• TV Studio• Production Control Room (PCR)
• Studio Lighting• Vision Mixer • MSR
• TV Sstem• !" Van• #arth station• DS$%
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About Doordarshan
• &t is a di'ision o Prasar "harti a *ublic ser'icebroadcaster nominated b the %o'ernment o &ndia+
• The DD *ro'ides tele'ision radio online and mobileser'ices throughout metro*olitan and regional &ndia as
,ell as o'erseas through the &ndian $et,or- and Radio&ndia+
• &t started its o*eration in ./0/+ $o, Doordarshano*erates 12 channels in 33 languages and is one o thelargest terrestrial net,or- in the ,orld+ • /24 o the &ndian *o*ulation can recei'e DD*rogrammes through a net,or- o nearl .522 terrestrialtransmitters+ 3
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Production Chain
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TV Studio
&t is an installation in ,hich tele'ision *roductions
ta-e *lace+ &t is di'ided into 3 ma6or areas7
Action AreaThis *lace ha'ing large
s*ace and ceiling includes
staging lighting
*erormance b artists and
arrangement to *ic-u*
sound and *icture 5
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Production ControlRoom
Acti'ities in this area
are7
a+ Direction to the
*roduction
cre, b the *roducero the *rogram+
b+ Timing a *roduction+
c+ #diting o dierent
sources a'ailable at*roduction des-+
d+ Monitoring o
out*ut8o air signal+
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Vision Mi(er
)
• A vision mixer (videoswitcher or productionswitcher ) is a de'ice usedto select bet,een se'eraldierent 'ideo sources and
in some cases mix 'ideosources together and adds*ecial eects+
• &t has man in*ut sourcessuch as cameras VCR8
ser'er %ra*hics8 Charactergenerators etc+
• Sources can be changed ascut to cut dissol'e ,i*eand other s*ecial eects+
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TV Sstem
• &t is *ossible to obtainan desired color bmixing three *rimarcolors i+e+ Red "lue andgreen in a suitable
*ro*ortion+• &t is onl re;uired to
con'ert o*ticalinormation o these threecolors to electrical signalsand transmit it on
dierent carriers to bedecoded b the recei'er+
• This can then becon'erted bac- to theo*tical image at the*icture tube
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• So the *ic- u* rom the cameras and out*ut or the
*icture tube should consist o three signals i+e+ R % and
"+
• &t is onl in bet,een the camera and the *icture tube o
the recei'er ,e need a sstem to transmit thisinormation
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%$ Van
• The mobile Production Control Room (PCR) is -no,n as
!" Van
• &t is the #lectronic
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Earth station
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•
&t is an u*lin- center rom,hich the signals are ed toSatellite or distribution in as*eciied area co'ered bthe Satellite
• The signal is u*>lin-ed romthe #arth Station andrecei'ed b man do,n lin-centers in TV broad casting
'ia PDA+• T*es7 AnalogDigital
AS$% DS$%
C>band or ?u>band
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"eneral con-gurationo. Earth Station
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Digital Signal 'e*s"athering )DS'"+• &t is li-e a digital #arth Station
• Programmes ma be u*lin-ed through DS$% rom an
*lace+
• DS$% ma-es it *ossible to bring li'e ne,s and s*ort tomillion o 'ie,ers+
• Com*onents o DS$%7
.+ PDA (Parabolic Dish Antenna)
3+
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&han! ,ou
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