Gary B
Planning on buying a home, I want too put a Security Camera in the home so I can monitor the home. Looking at 800 miles.
I understand the principle of the camera. What is a needed too support the camera? I presume another computer? Then what links that computer location "B" too my home Computer location "A" Again I presume the Internet,Does that link have too be high speed,can it be dial-up? But what happens at location "B" when I have a power failure and I have too re-boot that system,how is that done? And what program bridges the two computers too gether, If on the internet is this secure where only I can monitor?
Answer
There are a couple of ways that this can be done.
The easiest way would be to use what is known as an "IP camera." This is a CCTV camera with a built-in network adapter. You plug the IP camera into the internet. In a residential application, this would typically require a high-speed connection, such as DSL or cable. The IP camera is assigned its own IP address (such as 12.123.45.123).
At the viewing end, you would need a standard personal computer with an internet connection. To view the camera, you use a standard web browser, and enter the IP address to connect to the camera. There is usually a log-on screen that requires you to enter a username and password before you can start viewing. Some IP camera manufacturers also have their own software for viewing that work like the web browser but offer additional features.
So with the IP camera, you would need just the camera and an internet connection at the house, and just a standard PC with a network connection at the viewing location. With this arrangement, you could view the camera from anywhere in the world. The IP camera would pretty much restart itself in the event of power failure so there would be no issues with rebooting, etc. just so long as the network connection was intact.
A major manufacturer of IP cameras is: http://www.axis.com
Your second choice would be to use what is known as a "remote video viewing system". This requires the use of a video transmission unit (VTU) and one or more standard CCTV cameras. You plug the cameras into the VTU, and then plug the VTU into a standard phone jack. If you have ISDN, that works best, but a regular telephone line works also.
At the viewing end, you would need to have a standard PC that had a dial-up modem. You would need to install viewing software that came with the VTU on this PC. To view the camera, you simply launch the software and click a button. This establishes a connection with the VTU and the other end and allows you to view the camera.
One manufacturer of remote viewing systems is: http://www.ozvision.com
The IP camera with high-speed connections connections would allow you to view real time (or nearly real time) video so would offer the best viewing experience. The remote viewing system doesn't require high-speed connections, but typically offers less than real time video viewing.
Security Camera question!?
Q. I need a camera of some sort to catch what my dad does to me when we disagree on something.. he gets so angry and sometimes hits me for being wrong etc.... I was thinking of putting some sort of camera on the ceiling or if it was small enough close somewhere anyway if there is such a camera where could I buy it?and write down personal expirecences thanks!
Answer
Please don't give advice when you have clearly never worked with CCTV equipment. Amazon sells complete junk and the video taken by non CCTV cameras often wont hold up in coart because they need water marking in the images.
What you want is a DVR a DVR converts analog cameras and as well as storing images on site allows you to distribute video over LAN and WAN networks. (internet and network) this way you have both on site storage and recording at your house.
Just about any Analog DVR will do what you are looking for and not only display them but record them as well they will also allow you to view them over the internet from a Iphone or laptop.
Many people have a misconception that IP has Superior scalability then Analog but with the advancements with DVR's this simply isn't true, you cn do up to 16,000 cameras each camera could even be from a different DVR and a different site.
And when you are using the internet to connect multiple sites together analog transmits over the internet faster with less latency using less bandwidth allowing you not only to view and monitor a situation real time but also effective control PTZ cameras.
What is the Advantage of IP?
Many of the so called advantages of IP simply don't hold water in the real world, IP is mainly Hype and marketing and outside of a few niche applications such as 1 or 2 camera installs, where MP cameras are needed or large scale wireless projects which represent about 2% of the total CCTV market, IP has very few advantages compared to analog based on performance, cost and reliability. (yet all companies touting IP will often use MP cameras to demonstrate the advantages of IP)
IP video is more about marketing then it is about performance as larger companies like Bosch pelco Honeywell axis can change for both hardware and software and once you use there cameras you have to keep using there cameras unlike analog.
Also IP sounds great, plug and play, Better image quality, use existing infrastructure, who wouldnât want that unfortunately this is often not the case.
IP cameras are based on CMOS
Analog cameras are based on CCD (usually)
A CMOS sensor is constructed using a array of pixels, but unlike CCDâs CMOS do not have a capacitor to store the charge for each pixel.The rows of pixels are activated sequentially rather then individually
This means CMOS has some significant disadvantages compared to CCD, this means CMOS
have inferior ability to cope with ambient lighting such as back light, bright, deep shadows contrasts, low light and IR this is also known as the real word.
In short unless you have perfect lighting a good CCD camera will outperform an equivalent CMOS camera.
File Size:
The smaller the files size the more images that are able to be sent and the faster they can be processed improving both FPS and speed. File size is the heart of any DVR and goes far beyond just its streaming capabilities as it also determines the recoding storage time, how much you can back up at once, how fast it renders and searches video.
IP cameras have up to a 5X larger file size then analog cameras. (at same resolution) I have seen MP cameras that on 2MP resolution are over 300X (%3000) larger then our X3 DVR on a CIF image. This is an extreme case but generally speaking IP cameras have a much larger file size.
Most routers and switches are not designed to handle IP cameras they have enough bandwidth but they are not able to process the amounts of commands. (9 IP cameras 30FP is 230 instructions per second) standard routers have enough bandwidth (up to 1GB) but cant handle the amount of tasks (instructions) so frames get dropped latency is introduced and the effectiveness of other devices such as POS, printers and dats storage can be affected and compromised.
Donât get me wrong there are some brutal analog cameras and DVR out there but If you see a good D1 resolution image such as Ascendents Hardware compressed you will not be so quick to join the IP bandwagon.
IP is a young and emerging technology and I have no doubt that in the future it will outperform analog cameras but its not a mature technology yet. Once we start to get standard IP platforms, get rid of license feesâ and existing networks have larger bandwidths then IP video will be a good solution, but until then analog is the way to go.
Make sure you get good cameras as well, Ascendent has the best IR outdoor cameras on the market and are about %50 less then Bosch while offering triple the distance.
http://www.ascendentgroup.com/
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