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Noob question
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| KnowledgeSeeker |
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Posts: 4
Joined: 06 Nov 2008
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Posted: Thu Jan 01, 2009 10:21 pm
Post subject: Noob question
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Hi there, i just started to learn what is CCTV all about. so do anyone of you mind to tell me what does TVL mean? Is there any big difference between a dome camera with 380TVL and 480 TVL?
Spec below which 1 better resolution, save cost,clear view? eg: for Day use . Does TVL's value effect the output? Please assist me. Thank You.
1)
IR Space Dome Camera (380TVL)
1/3" SONY Super HAD CCD, 380TVL, 3.8mm Fixed Lens,
AWB, AGC, 100mm dome size, 2-Axis, 12VDC,
24 LEDs, 1 CdS Sensor, 0.00Lux(IR LED On)
IR LED's Visibility Range : 15 meter (850nm, 30˚)
and
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1/3" SONY Super HAD CCD, 480TVL, 3.8 mm Fixed lens,
AWB, AGC, 85mm dome size, 2-Axis
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| Sawbones |
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Posts: 255
Joined: 24 Aug 2008
Location: Below the Mason Dixon
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Posted: Thu Jan 01, 2009 11:10 pm
Post subject:
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TVL is "TV Lines," and is loosely analogous to resolution.
So the more, the better.
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Sun Jan 04, 2009 2:15 pm
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The more lines, the closer the lines together and the closer the lines together the higher the potential video quality.
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| ispy4u2 |
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Posts: 27
Joined: 29 Dec 2008
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Posted: Mon Jan 05, 2009 1:56 pm
Post subject:
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Since the topic has been addressed on TVL, what is your camera requirements?
Indoor or Outdoor?
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| ak357 |
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Posts: 461
Joined: 16 Nov 2005
Location: Canada
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Posted: Mon Jan 05, 2009 2:14 pm
Post subject:
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| cctvexpert wrote: |
| The more lines, the closer the lines together and the closer the lines together the higher the potential video quality. |
What determines how close are lines ?
Thanks
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| cctvexpert |
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Posts: 117
Joined: 28 May 2004
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Posted: Sun Jan 11, 2009 8:31 am
Post subject:
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what determines how close lines are together is the resolution that has been selected
CIF is 352 x 240
2CIF is 704 x 240
4CIF is 704 x 480
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