Selasa, 18 Maret 2014

recomend security cameras?




bill


can you reccomend a good security system that will handle 3 cameras with motion detectors that can be viewed via remote access. please explain if possible.

thanks



Answer
Hello

Now when you ask for cameras with motion detector do you want them to be able to record only when there is motion, or do want them to have an actual motion detector inside of the,.

If you want them to be both a CCTV camera and a working motion detector I suggest Ascendents ASC-380PIR37.

link to the ASC-380PIR37
http://dealer.ascendentgroup.com//specialtycameras/31_1.html

If all you want is a camera that records when there is motion then all you need is CCTV cameras and a DVR. CCTV cameras put out 30FPS per second and send those images to a DVR it is then the dVR job to manage the video (decide when ans how to store the images, and allow you to remote connect to the cameras.)

the problem with viewing your cameras over the internet is most DVR file size is too large. File size is crucial to streaming because most DVRâs on the market record at real time performance (30FPS per channel) so on a 4CH is trying to send 120, 8CH 240, and a 16CH 480 images per second which requires way to much bandwidth even for the most extreme internet connections.

also uses the latest H.264 codec becasue it offers better quality,. While its file size sizes is 30% smaller than MPEG-4, 60% smaller than MPEG-2, and exponentially smaller than MJPEG.

Not all DVR are created equal In fact, there are many options that offer varying performance much like the automobile industry. In the world of DVR's you can find the equivalent of a $10,000 Kia and a $350,000 Ferrari and everything in between. Both have 4 wheels and windshield but that where the similarities end, itâs under the hood that counts. Just like any other consumer electronic in the end you get what you pay for.


If you are buying a DVR and streaming is a high priority I suggest get them to do a demo and connect to the DVR to make sure it is able to stream fast enough for your needs. Most DVR say they have Remote Viewing but it is often to slow and laggy to be of use. Some good DVR brands that I recommend are Bosch, Pelco, Honeywell and Ascendent.

www.ascendentgroup.com (Recommended)
www.honeywell.com
http://www.pelco.com/
http://www.bosch.com

Again I recommend going with a PC based DVR but if you don't want to spend the money I suggest Ascendent's AVP-4120 DVR or Pelco's DX-4000 as they will allow you to view all your cameras instantly from anywhere in the world using either IE. The AVP-4120 will also allow MAC platforms as well as PC to remotely view cameras and it uses the new H.264 codec but no standalone will offer the video streaming or performance a good PC based DVR will.

If you want to see how a good PC based DVR stream bellow are instructions on how to connect to Ascedent's X3L PC based DVR.

Instructions on how to connect to Ascendentâs DVR with Internet Explorer:

1) http://connect.ascendentgroup.com/ (Must be Internet explorer)
2) Install active X control
3) Hit âConnect)
4) DVR type PC
5) DVR code SITE-100
6) User ID Demo (case sensitive)
7) Password demo (lower case)
8) Hit extend config
9) IP address: 24.66.224.223
10) And hit connect

I hope this helps if yo have any other questions feel free to shoot me an email.

williammorales93@ymail.com

Where can I find a good camera security system?




Joey Tatum


I have been looking... I know i can get a system at SAM'S for 500 dollars but it only has 4 cameras... i haven't found one that is reasonable that may have 8+ cameras without paying thousands... I am visually impaired and we've been having some "snoopers" lately and want to beef up the security around the house (visual security with taping capabilities)... if you know of something good AND inexpensive, please tell me...


Answer
Good an inexpesive is a relative term. If you think 500 bucks for a DVR with 4 camera's is too expensive then forget about 8. - Personally, I would never buy the system you are looking at. My customers tend to expect quality and reliability as do I.

Typically speaking, retail camera's, like the type you are looking at, are fairly substandard when compared in quality to those on a professional level.

Your best bet is to go at it with some knowledge of the technology, I wrote an article on the subject awhile back but most of the info still applies. I have pasted some of it here. You can find more information on security related topics on my website at http://www.keepsafesystems.ca

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The starting point of any C.C.T.V. system is the camera. Simply stated, a camera is a light sensitive device that converts particles of light into electrical impulses, however, there is a vast difference in the quality of cameras available to the consumer. Factors that differentiate the various cameras include whether they are color, black and white, light sensitivity, image resolution and image transfer technology. The consumer must also consider the inherent advantages and disadvantages in each of these different camera technologies and decide which features best fit their individual needs and goals.

In the past, color cameras have been both very expensive and lack-luster in their image performance, when compared to black and white cameras. New technology is now bringing the innovative technologies closer together in both the price and performance scale. The current differences between the two technologies are almost entirely limited to light sensitivity and light reactivity.

Light sensitivity is measured in LUX. The lower the LUX rating, the higher the sensitivity to light. It is important to keep in mind that even the best-rated cameras are limited by the technology of the day, as well as the visibility conditions present at the time of the surveillance. Although great advancements in low light surveillance continue to be ongoing, the image quality in a low light situation will rarely be up to the standards of daylight surveillance.

Color cameras, although much more appealing on the outside when compared to their black and white counterparts, generally offer less low light sensitivity than a black and white camera. The other advantage of black and white cameras over color cameras is its ability to "see" infrared light, which is invisible to the human eye. You can test this by aiming a standard television remote at a black and white camera while watching the monitor, the flashes you see are bursts of infrared light. The advantage of this becomes apparent in the ability to light up a dark area with infrared light, thus making images visible in almost pure darkness. With the color camera the area will appear unlit, however, to a black and white camera, the area will appear almost like daylight.

The black and white cameraâs reactivity to the invisible light spectrum can also pose a disadvantage in certain applications. Infrared light, although not visible to the human eye, is found in abundance in many everyday situations. For example, when aiming a black and white camera at hot pavement, it will "confuse" the camera resulting in an unbalanced image. Professional grade black and white cameras often incorporate infrared cut-filters. These cut-filters inhibit the infrared light spectrum in turn decreasing the cameras low light sensitivity.

The C.C.T.V. Industry measures image resolution in horizontal lines. The higher the line rating, the clearer the image will appear. With this fact in mind, consider that all electronic components within a C.C.T.V. System, from the camera, to the VCR, to the monitor. These items are all rated in the same way. The actual resolution of the entire system will only be as high as the lowest rated item. For example, if you have a camera rated at 450 lines and a monitor rated at 300 lines, then the result will be 300 visible lines of resolution because the monitor is the lowest rated item in this example. Another point to keep in mind is that the line rating is "Total lines" not lines per inch. Therefore a 12" monitor with a 300 line rating has a far better clarity than a 17" monitor with the same line rating.

The most recent and predominant advances in the C.C.T.V. Industry are the changes in image transfer technology. This technology deals with how the camera takes light particles and converts them into electronic images. Without going into too much detail, image transfer technologies include the following:

Phosphorus Tube Cameras - This camera has low quality, old technology and is susceptible to "image burn". Image burn is when intense light sources will burn themselves into the cameraâs light receptor resulting in the image appearing "memorized". Although this is not a problem with modern day cameras, image burn can still occur on monitors. Tube cameras are also known for poor low light sensitivity.

C.C.D - Also known as "Chip cameras". This camera is the most standard of cameras in the professional realm. C.C.D. cameras do not suffer from the problem of image burn and can incorporate various methods of signal processing, which offers a high level of flexibility to the installer.

CMOS Transfer Cameras - These cameras are very small and continue to get smaller as the technology advances. Although very attractive in their size, CMOS cameras generally do not offer the signal processing, image quality or low light sensitivity of the higher priced C.C.D. camera models. However, the technologies are slowly growing closer together to the point where CMOS cameras may eventually take over the Surveillance Industry.

The Surveillance Industry has continued to move towards the implementation of color cameras that switch to black and white, or even infrared in low light conditions. Although there are some models currently available on the market, the technology is not at a point where it is affordable enough to be manufactured on a large scale.




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