 |
|
 |
What is the highest CCTV camera resolution?
|
|
|
| cctv_addicted |
|
Posts: 2
Joined: 15 Oct 2007
|
|
Posted: Mon Oct 29, 2007 2:43 am
Post subject: What is the highest CCTV camera resolution?
|
Hi guys.. just want to know whats the highest cctv cameras resolution that you know..
please leave a link here..
thanks
|
|
|
|
|
|
|
| rory |
Moderator & Founding Member
|
Posts: 14311
Joined: 10 Nov 2003
Location: Bahamas
|
|
|
Posted: Mon Oct 29, 2007 5:20 am
Post subject:
|
|
|
|
| cctv_down_under |
Founding Member
|
Posts: 2264
Joined: 13 Nov 2003
Location: Brisbane Australia
|
|
|
Posted: Wed Nov 14, 2007 8:51 am
Post subject:
|
I guess that question requires more factors before answering, it depends if the .7 correction is taken into account and if oversampling has been done or if indeed it is a digital image (IP camera). I was under the impression that 570TVL was the Maximum , but it depends if we are talking horizontal or vertical resolution?
_________________
" You want that camera to go WHERE?!!!!!!@@##$"
|
|
|
|
| doSecurity |
|
Posts: 6
Joined: 30 Nov 2007
|
|
|
Posted: Sat Dec 01, 2007 12:27 am
Post subject:
|
|
in China market,seems 540TV Line is the highest for Color,and 600TV Line is the highest for B/W.
|
|
|
|
| Dr. CCTV |
|
Posts: 9
Joined: 20 Dec 2007
|
|
|
Posted: Thu Dec 27, 2007 3:22 pm
Post subject: Max. Security Camera Resolution
|
This is by far one of the most common security related questions I have run into. If you are interested in the details of camera resolution I highly recommend Vlado Damjanovski's latest CCTV & network video book, its excellent and authoritative. According to him the highest resolution attainable by a B/W analog camera is ~600 horizontal TVL. Colour cameras on the other hand will always be lower if you are comparing oranges to oranges. Naturally, of course, you can find a monochrome camera with a higher specified resolution than a colour camera. The highest colour resolution that I have seen quoted was for an unreleased Speco IR-bullet camera, but, you will typically come across cameras of upwards of 550 TVL of hor. res.
Dan
|
|
|
|
| mcs |
|
Posts: 301
Joined: 07 Jul 2004
Location: Austie
|
|
|
Posted: Thu Dec 27, 2007 11:38 pm
Post subject:
|
Thats the thing Greg
Are we talking HOR or VER lines,
Old skool really, ask any TV technician Or electronics tech,
You do notice better pics between
480, 520 and 570 tvl dont you
depends on the monitor to 
_________________
GEOVISION, SAMSUNG reseller- Installer- Qualified cabler and Licensed Security company.
Inner Range Certified technician
S/E QLD Australia.
|
|
|
|
| SBTVideoman |
|
Posts: 39
Joined: 17 Feb 2007
|
|
|
Posted: Sun Jan 06, 2008 1:41 am
Post subject: Camera resolution
|
| |
 |
 |
Some other things to consider
1) Bear in mind we're talking about analog cameras here...in other words, the analog signal on the back of the camera.
2) Virtually all cameras can only produce a signal that's higher than 500-540TVL when using a S-VHS output instead of their composite (BNC) output - try this for yourself....with any camera that has a SVHS output...every single one that I've tried (this includes Bosch Dinion, GE UltraView, Siemens CCBX series, Kampro EVR/HDR series) has a noticeably sharper image on the SVHS output than on the BNC/composite output.
3) Length of cable run...if you run 15-20 metres or more of coax from the back of the camera to the DVR/monitor, degradation of the analog signal means you will struggle to tell the difference in absolute resolution between a 480TVL and 540TVL camera (assuming we're talking about equal quality cameras with equal quality lenses). Analog signals degrade with distance and that's just a fact.
Finally - consider WHAT happens to the camera signal once it gets to its destination.
1) Is it being recorded on a DVR? If so, at what compression level and resolution? If you record at 2CIF (like most DVR's do), then the playback image quality will be lower than the live signal. I can send you images captured off a 2CIF MPEG4 DVR at max quality that show a 330TVL camera is just as good as a 540TVL one...once you digitise it and compress it, the DVR becomes the limiting factor.
2) What's the resolution of the monitor you're using? Unless the monitor has a SVHS input and can display at least 500 TVL of resolutionl, you'll struggle to see any appreciable difference in resolution.
Try this: Get a DVD player (any brand) and grab any recent blockbuster movie, and connect it to your TV with the composite signal, then connect it using the SVHS signal. If you cannot see an appreciable difference in signal quality I'll be surprised.
Moral of this rather long discourse? Who cares what the theoretical resoluiton of the camera is....at the end of the day the real-life performance of the system depends on the rest of the signal chain.
|
|
|
|
| DVHost |
|
Posts: 27
Joined: 10 Oct 2007
|
|
|
Posted: Mon Jan 14, 2008 5:18 pm
Post subject:
|
Those are incredibly fine points and something everyone especially beginners like myself should consider.
With that said, signal degradation due to distance, degradation due to compression, does that not equate to using the best possible resolution from the camera to insure the best end result. If you use a low resolution camera, would it not degrade even further over distance and then even further over compression?
|
|
|
|
| Deluxecctv.com |
|
Posts: 147
Joined: 23 Jan 2007
|
|
|
Posted: Sun Feb 03, 2008 5:02 pm
Post subject:
|
|
The highest color cameras we sell are 600TVL. Talk about great resolution. We have never had a return on these cameras and are still going strong. Let us know if we can help you with anything else. Thanks
|
|
|
|
| stephenlee |
|
Posts: 1
Joined: 18 Mar 2008
|
|
|
Posted: Tue Mar 18, 2008 4:56 am
Post subject:
|
|
I am a new comer. To my understanding, now most of the camera over specify the figures. i.e. playing the figure game to attract customer. Of course it is not good to the market. Talking about the resolution, we better look into what the solution it is using. Say for example Sony SS11, most of the manufactures claim for 420 tvlines. But, if we look into the SONY specification, it only carries not more than 320 lines. Plus, some of the lines have been used and cannot be seen in the monitor. So, 570 tvlines. who could do that?? I am very curious as the solution which is SONY HQ1. Sony could only achieves arround 520 tvlines by using the SVideo output. 540,530,570 is only a joke.
|
|
|
|
| cocacola |
|
Posts: 123
Joined: 12 Feb 2008
|
|
|
Posted: Tue Mar 18, 2008 10:01 am
Post subject: Re: Camera resolution
|
| |
|
|
| SBTVideoman wrote: |
Some other things to consider
1) Bear in mind we're talking about analog cameras here...in other words, the analog signal on the back of the camera.
2) Virtually all cameras can only produce a signal that's higher than 500-540TVL when using a S-VHS output instead of their composite (BNC) output - try this for yourself....with any camera that has a SVHS output...every single one that I've tried (this includes Bosch Dinion, GE UltraView, Siemens CCBX series, Kampro EVR/HDR series) has a noticeably sharper image on the SVHS output than on the BNC/composite output.
3) Length of cable run...if you run 15-20 metres or more of coax from the back of the camera to the DVR/monitor, degradation of the analog signal means you will struggle to tell the difference in absolute resolution between a 480TVL and 540TVL camera (assuming we're talking about equal quality cameras with equal quality lenses). Analog signals degrade with distance and that's just a fact.
Finally - consider WHAT happens to the camera signal once it gets to its destination.
1) Is it being recorded on a DVR? If so, at what compression level and resolution? If you record at 2CIF (like most DVR's do), then the playback image quality will be lower than the live signal. I can send you images captured off a 2CIF MPEG4 DVR at max quality that show a 330TVL camera is just as good as a 540TVL one...once you digitise it and compress it, the DVR becomes the limiting factor.
2) What's the resolution of the monitor you're using? Unless the monitor has a SVHS input and can display at least 500 TVL of resolutionl, you'll struggle to see any appreciable difference in resolution.
Try this: Get a DVD player (any brand) and grab any recent blockbuster movie, and connect it to your TV with the composite signal, then connect it using the SVHS signal. If you cannot see an appreciable difference in signal quality I'll be surprised.
Moral of this rather long discourse? Who cares what the theoretical resoluiton of the camera is....at the end of the day the real-life performance of the system depends on the rest of the signal chain. |
Why do we not use the SVHS output than?
_________________
GPS and GSM Jammers: http://stores.ebay.com/Zeta-0049
|
|
|
|
| zmxtech |
|
Posts: 285
Joined: 09 May 2007
|
|
|
Posted: Tue Mar 18, 2008 8:41 pm
Post subject: cams
|
just to BIG note myself....
I now have 16 mega pixel IP cams !
z
|
|
|
|
| frankesco |
|
Posts: 1
Joined: 21 Mar 2008
|
|
|
Posted: Fri Mar 21, 2008 6:00 am
Post subject:
|
Hi Guys,
Could anybody help me to find european dealers for AVTech products?
Thanks
|
|
|
|
| CameraGimp |
|
Posts: 107
Joined: 10 Oct 2007
|
|
|
Posted: Sun Apr 13, 2008 12:35 pm
Post subject:
|
In reply to the question "why don't we use SVHS output then". Two things it is only certified upto something like 2 metres (so not very useful). Secondly and I'm just being a bit picky here but SVHS is a video recording tape or standard, the output on a camera is S-Video. S for separate video rather than composite video. S-Video uses two pairs of wires one with the lumninace the other the colour information. It's cleaner and so achieves better resolution.
_________________
DarkData (UK) Online Digital Backup
|
|
|
|
| atropine |
|
Posts: 81
Joined: 01 Apr 2007
|
|
|
Posted: Sat Apr 19, 2008 2:44 am
Post subject:
|
| |
|
|
| CameraGimp wrote: |
| In reply to the question "why don't we use SVHS output then". Two things it is only certified upto something like 2 metres (so not very useful). |
I've used a dirt cheap 10metre S-VHS cable, gave perfect results over that length. I was going to do a test by hooking up more 10m cables together until signal degradation became obvious, but shop sold out, so never did.
Only thing of note, was that Dirt cheap 10m S-VHS cable gave stunning picture quality, dirt cheap 10m composite (non coaxial) video cable gives noticeably lower resolution and colour noise as expected from composite video, but also noticeable degradation over that 10 metre length.
Given that observation, I had wondered weather you could use a dual run of coaxial cable with Luminance on one, and chroma on the other, which might give equal or better range than composite on Coaxial cable. If that worked then it could also be done with a network cable and dual balun on each end.
|
|
|
|
|
Options and Permissions
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
|
| Page 1 of 5 .:. Goto page 1, 2, 3, 4, 5 Next |
|
|
|
