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How about running active baluns? I've not tried them yet but the specs can go up to 1km or even more. NVT is a established brand that you can try.

Hi all .. I intend for this topic to go beyond the usual specs like: TVL / Pixels Min Lux Lens (3.6mm/6.0mm/etc) etc Obviously this section not too useful for the "whats-the-cheapest-cam" group of buyers .. but might be(I think) critical for those who require for important/specialised installations .. some questions may be weird though .. FEEL FREE to add on any additional things that u've come across that falls into this category so that future readers can benefit from a one-stop place to learn all the "hidden details" for camera selection. Interlaced vs Progressive Scan * Are ALL analog cameras using interlaced scan by default? * Are DVR (Analog) Progressive or Interlaced? * For network cams .. If it is not specified, will it be safe to assume it uses interlaced scanning? Lag in IP Cam * What is the cause of the lag in IP Cam? (Actual motion vs actually seeing it on screen) * Is there anyway to tell from spec sheet if there will b a lag? Signal/noise Ratio What is a "good" S/N ratio? Is S/N ratio critical for IP Cams? I browsed thru few of my brochures but there is no S/R ratio ratings on them? Size of sensor I understand that size of sensor affects the image quality of the video. It seemed like the specs of most of the reputable brands have the following trend: - Below 1MP : 1/4" - 1 to 2MP: 1/3" - 2 to 3MP: 1/3" or smaller [list=]So can I expect quite a big dip in the image quality for example a 2MP on 1/4" CMOS? Assuming both uses progressive scan

Thanks for the sharing Soundy

How much diff does the lens make in the results for a OEM lens vs a high-end lens like Tamron / Samsung / Fujinon?

But it seemed not too likely that the prices of those DVR are gonna drop and popularity rise in the next 1-2yrs right? If that is so .. then wouldn't it be more feasible to use a 600TVL and wait for the the warranty to expire before deciding on the next step? For all we know MP IP cams may have fallen so much in price by then .. anyway that's just my 2 cents .. .. anyone else like to share their views on this?

Thanks everyone for your generous sharing So .. I gather that for my question: The likely cause is the will be the codec issue? So it has nothing to do with the processor in the camera itself? New Question 01: I've got a entry level IP Cam from Vivotek n it lags like 1/2sec! The higher end models that my supplier showed me runs really smooth. I am just curious why the same manufacturer will want to develop diff codec for different range of camera? New Question 02: Have anyone tried those cheap IP Cams from network products companies like Linksys / D-Link / etc? What do you feel about those?

I know that there are LOTS of baluns to transmit analog camera signals via a Cat5 cable .. BUT .. is there one that works reversely? So that I can install IP Cams using the existing coaxial cables? If not, what is the most cost effective way to convert from Analog to IP?

When there is a interlaced distortion which will be the most likely cause of the problem? Camera? DVR? Both?

Blu Ray?? there's blu-ray cctv system?!?

Great! Thanks!

Thanks SurvTech

Hi .. I could not really find stuff in the forum that addresses the lowdown into HD IP Cams .. so I thought I might as well just start 1 .. My Question: 1) HD vs Megapixels I understand that HDTV cams have resolution of 1980x1080 .. which is effectively a 2MP cam. It also has to comply with a series of HDTV standards like 16:9 aspect ratio. So .. does it mean a 3MP IP Cam beats a HD1080? Is there any chance that a 2MP Cam gives better results HD rated Cam? What about the colours, noise, crispness/sharpness of images, frame rates? I mean assuming both are from reputable brands. What does the "HD" marking signifies?? I mean .. to most layman .. it sounded like the holy grail .. but is it really so? (let's just ignore the price tag for this discussion ) Will be heaven if someone has a demo link to view a comparison on a live system

Ok .. I m gonna sound really noob now .. Unfortunately in Singapore .. which is extremely safe (and people are extremely ignorant) .. there is little chance for me to push for megapixel setups The images looked fantastic to compared to the usual analogue cameras that I've installed. But how does compare with other IP cameras of the similar specs (EG: Axis / Mobitix /etc) and price ranges? Anyone got more pix to share?

Hi fellow forumers, Got a query recently on installing a CCTV Surveillance system on a ship. Here are some of their requirements: * anti-corrosion due to the salt water * vibration resistant due to the motion of the ship * night Vision - IR * discreet - camouflage-able The ship is about 180m x 35m The main purpose of the system is for surveillance against pirate attacks mainly. They intend to monitor the movement should their ship be hijacked by pirates, they will move into a locked security cabin to hide and monitor if the pirates activities. And when the pirates have left, they will come out of their hiding to continue their voyage. Really like to know 1) if there is any international standards for the equipment used in the seafaring industry to prevention against sea water corrosion and motion. 2) Is there any code of practice for actions to take when attacked by pirates. 3) Is there any other considerations that I've missed Thanks in advance Cheers, Ed

IS there such a device or is there anything like that which can be done? The setup is for a portable CCTV system that can be mounted onto lamp posts and detached easily (or relatively easily) for re-deployment. The most tricky part I can see is a independent power supply. I've suggested solar panels to my prospect but he felt that solar panels are too expensive. Hence I am thinking of something like this: An IP cam with 1) SD Card Storage or USB Hard-Disk output (I've seen before a year ago from China) 2) Optional 3G internet connection A weather-proof housing that will store a power supply. Either a Battery or a UPS. Or anything else. Does anyone has any suggestions for such a setup?

Hi .. I got an request to design something in a shipyard and would like to seek some advise. All dimensions in mm (1000mm = 1m = 3.3ft) Scenario: It is a shipyard where the client wanna monitor the fabrication yard. They wanted to have 3 outdoor PTZ viewing the external of the yard. 1 indoor camera to monitor the inside of the yard. The client have various offices, in Singapore, in the USA and Europe. The management want to be able to monitor from these various countries, so a stable remote access is needed. The Site Office (Bottom right) currently has an exisitng internet infrastructure in place already. The most tricky part is this: This site is on an Island about 1hr boat ride away from mainland in a neighbouring country. My questions: 1) Which a more ideal setup? The conventional cameras using RG59 cables or Wireless IP cameras. 2) How would u quote the client given that highly likely that I'll need to bring my installers to do a site survey and maybe even my network IT partners. Since it is really a little difficult to determine a lot of factors till we actually do a ground survey. 3) How would u solve the material issue? To find a local supplier or to ship all equipment locally and ship them in? This may include the cables, galvanised iron conduits etc Naturally, the 2nd option will give us full control over the quality but will definitely increase the overall costs by quite a bit.

OMG!!! Returned items?!?! That is a definitely no-no!! I won't wanna jeopardizing any security with a returned product. wat do mean by "box sets"??

Sorry Tom .. but I beg to differ .. I do not know Maplins as I m from Singapore .. But I have handled enough AVTech systems to say that the mentioned system is good enough for basic usage. It does fulfills all except the detects only on motion .. there's a way to configure that .. but I usually leave it as the default now since Hard Disk are so cheap. A 500GB HDD shld be enough to record for more than a mth given that he needs only 3 cameras. AVTech systems work very well with iPhones with the EagleEyes iPhone Apps

Maybe they need a bilingual interpreter who is in this field! Hmmm .. maybe I fit the bill!

I think this is a common practice .. they unlikely will release SDK for a 1-2 sample purchase .. Not sure what did Ben wrote specifically .. but do understand that English is not a native language in China .. so sometimes mis-communications do occur .. why don't u try to talk further with them .. most of the Chinese suppliers I encountered are pretty friendly .. oh .. yes .. I communicate with them in Chinese often though ..

Ok .. first .. apologies A little irrelevant .. My company has got a DDNS Server, with our own DDNS client, setup many years (5-6yrs ago) back for a project with a local ISP. Now the users are dwindling and the ISP is planning to pull the plug on this project .. so unless I can convince them with the potential for profitability from this DDNS Server.. It will probably go down as a good ol memory .. My question is this: Is there who will pay a subscription for a DDNS service that will allow u to access all your CCTV systems remotely without having to install any software .. all things web-based .. assuming u have a few branches across the country And maybe with a few nicey like alerting you when we don't hear from your DVR Next Question is: Is there any service that you wouldn't mind paying a few bucks to subscribe for .. so as to make the managing of your CCTV .. or any related tasks easier .. or more porductive?? If it is NO to both the above .. then should I really just retire this project or is there anything that I can convert this Server to be used for?

What are some creative ways to use functions like: Face Detection Unattended Objects Traffic Counting Missing Objects I mean this creative uses will definitely help to better promote PC-Based sys .. since not everyone needs to count cars .. monitor an priceless renaissance master piece .. Let's share some tips

Hi William .. What is LPR?? "Face Recognition" - do you mean that it can distinguish Tom from Tim .. Mary from Maria? That's cool! How do u find the accuracy of the Object Counting? I mean .. Artificial Intelligence can only identify till a certain degree of accuracy .. btw .. u using GeoVision too??

Actually to be very frank support from China based manufacturers' is really good .. from my short encounter with them over the past few months .. even better than the Taiwanese (most of them) and some Koreans .. The only problem is language .. but can see that they are doing their best .. fortunately I speak and write Chinese Oh ya .. Chinese New Year is around the corner and better get all the stuff u want NOW .. Cos I understand some are going for a Super Duper Long Holidays!!

Any extra-special something that u can think of?