Saturday, January 31, 2015

Principles of Surveillance System Installation

8 principles surveillance system installation

Safety awareness increases, Video surveillance systems into our lives. Video surveillance program are also more and more, So the first thing to consider installing surveillance systems of the following 8 major principles:

1.Real-time monitoring system
Real-time monitoring is very important, and it’s necessary for the Monitoring System.

Security and confidentiality measures to prevent the illegal invasion and illegal operation system.

Monitoring system equipment used modular structure, The system can be extended no need to change the structure of the network and hardware and software.

The system provides software, hardware , communications, networking , operating systems and database management systems and other aspects of the interface and tools that meet international standards , so that the system has good flexibility , compatibility , scalability and portability.The entire network is an open system that is compatible with a number of monitor manufacturers of products, and to support the secondary development.

Equipment and technology used in line with internationally accepted standards.

System features full use of existing video surveillance subsystem networks. Monitoring can be used in different business, it is full-featured and easy to configure.

Monitoring systems will become an advanced , future-proof , high reliability, confidentiality, easy network expansion , strong connection data processing capabilities, the system is running manipulate simple security system .

Video surveillance systems have to complete the project in the required functional capacity and standards. Comply with the requirements of norms of domestic and foreign, and the advantages include ease of operation, Low- cost and high-performance.

Tuesday, January 20, 2015

PTZ camera advantages & Disadvantages

PTZ camera advantages & Disadvantages

PTZ cameras occupy a special place in the field of video surveillance. So, here’s an article which will throw some light on how these cameras can prove useful, what are their deployment pros and cons and other related points.
Basically, a PTZ security camera is a network camera which reflects the movement options of Pan, Tilt and Zoom. These cameras can be mechanically operated, where the user typically has the ability to control the Pan-L and R (Rotate Vertically); Tilt- Up & down (Move Horizontally); and Zoom (Point Down an objects) of the camera with a joy stick / Key Board / hardware device or another software.

PTZ cameras are ideal choice for monitoring large public places like stadiums, traffic signals, and other environments. If these cameras come tucked with the feature of megapixel or high definition (which is now possible in 2015), then they add absolute value to the whole deployment security surveillance.
Coming to the Pros and Cons of PTZ cameras, here’s a bit of illustration-

PTZ camera advantages
1. With the help of a capable VMS, the PTZ cameras can be auto programmed. So, these cams can capture the front doors, the gate and the fence at regular intervals and can achieve the best out of it.
2. If the video from this camera is under live monitoring then an operator can track down a suspect or respond to a threat triggered by the video management software integrated with the camera. The operator can then zoom-in and take control of the situation and if necessary can act in time for loss prevention. If the PTZ camera is tucked with high definition, then the captured image can help the operator track the facial features of a suspect, license plate of an automobile involved in crime or identify an object of interest.
3. As these security cameras can be panned, zoomed and tilted, hundreds of acres of land can be monitored day/night. So, by using a PTZ in premises, the cost of coverage per given area can get reduced.

PTZ camera Disadvantages
1. As every technology has its pros and cons, so does the PTZ camera. Generally, people gather an opinion that these cameras are capable of covering 360 degrees. Except for a couple of cameras available in the market of this sort none can truly cover up more than 180 degrees. So, go for a demo if the camera PTZ maker claims to make a camera with not just 360 degrees coverage.
2. The other disadvantage which can prove advantageous to criminals is that these cameras record where the lens is focused. So, if an incident occurs and if the camera is pointed in other direction, then it could potentially miss the event entirely and this could miss vital video evidence.
3. Though, there is a lot of development in PTZ cameras offered by different manufactures, it is often observed that they need to be regularly maintained and have a shorter life span. Moreover, most installers feel that in hot conditions, these cameras will give-up. But yes, if they are secured in a housing which keeps the inside temperature under control, then these cameras tend to work fine.
4. The sensors of PTZ cameras are smaller when compared to fixed cameras. So, image quality is not up to the mark. But as technology improvisation is taking place is this segment, it is reviewed to be yielding better results.
5. To get the best out of a PTZ camera monitoring, a live operator dedicated to monitor the system is needed. So, here a rise in surveillance costs can be observed.
6. If the PTZ camera is not properly installed, then a slight wind can push the video output into doldrums. So, the installer must be very careful in such camera deployments.
7. PTZ cameras if positioned in unwanted places can land the installer and the owner installing the equipment into legal trouble. And if their focus includes the coverage of an opposite house swimming pool or lawn even by an inch, then the installer and the related authorities will be in deep trouble.
8. PTZ controls are sensitive to latency and if the latency is more than a fraction of second, then the PTZ control can go out of gear.
9. PTZ cameras have more features in them and so their cost is 60% high than normal fixed cameras.
10. The position of a PTZ camera will indicate the focus of its lens. So, an attacker can creep into the blind spot of the camera and spray some paint on the camera lens, in order to prevent the camera from recording further. There is a high chance that the image of the person doing such mischief can get skipped.
Therefore, in order to get optimal results from PTZ camera deployment these cameras can be made as a supplementary with fixed cameras for investigating a situation or tracking a criminal.

Hope, this article helps in unraveling the truth about PTZ security cameras.

Saturday, January 17, 2015

720p and 1080p explained

720p explained
720p is the shorthand name for a category of HDTV video modes. The number 720 stands for the 720 horizontal scan lines of display resolution (also known as 720 pixels of vertical resolution), while the letter p stands for progressive scan or non-interlaced.

Progressive scanning reduces the need to prevent flicker by filtering out fine details, so sharpness is much closer to 1080i than the number of scan lines would suggest. A 720p frame has about 1 million pixels. Compared to it, a 1080p frame has 2 million pixels so the amount of detail doubles. However in practice the difference between 1080p vs 720p is not as obvious as the one between standard definition vs high definition (480p vs 720p). For example a regular DVD isn’t even considered high definition because it is either 720×480 (NTSC) or 720×576 (PAL) but it looks much better than regular NTSC or PAL TV broadcasts and not as great as 720p. That being said, you do get more detail from 1080p than from any resolution if you have the “winning” formula for screen size, resolution and viewing distance – that is if you have the optimum conditions to get the most out of 1080p.

1080p explained:
The number 1080 represents 1,080 lines of vertical resolutions (1,080 horizontal scan lines), while the letter p stands for
progressive scan (meaning the image is not interlaced). 1080p can be referred to as full HD or full high definition although 1080i is also “Full HD” (1920×1080 pixels). The term usually assumes a widescreen aspect ratio of 16:9, implying a horizontal resolution of 1920 pixels. This creates a frame resolution of 1920×1080, or 2,073,600 pixels in total.

The only pure 1080p content comes from high definition DVDs like Blue Ray and HD DVD. Regular DVDs are way below that, having just 480p or 576p. You also get HD content from TV broadcasts but for now only 1080i and 720p. Basically 1080i offers pretty much the same amount of detail as 1080p but the quality of fast moving scenes is a bit inferior to 1080p. To understand this better read the 1080p vs 1080i guide. 720p content will of course look the same (or very similar) on a 1080p screen as it does on a 720p screen because what also matters is the content resolution not just the screen resolution.

Here is a sample with the difference between 720p and 1080p:
480i - Total image resolution 337,920 pixels
480p - Total image resolution 337,920 pixels
720p - Total image resolution 921,600 pixels (roughly equivalent to a 1 mega pixel camera)
1080i - Total image resolution 2,073,600 pixels (equivalent to a 2 mega pixel camera)
1080p - Total image resolution 2,073,600 pixels (equivalent to a 2 mega pixel camera)

More lines is nice but don't forget about the 'p' and 'i' in the 720p, 1080i and 1080p. The letter is an abbreviation for the type of scan the TV uses -- 'p' stands for progressive and 'i' stands for interlaced.

Saturday, January 10, 2015

1000BASE-TX over CAT 6

1000BASE-TX over Category 6

TIA/EIA-854 : A Full Duplex Ethernet Physical Layer Specification for 1000Mb/s operating over Category 6 Balanced Twisted Pair Cabling (1000BASE-TX).

This document specifies a full duplex Ethernet physical layer interface for 1000Mb/s operation over a 100 meters of a Category 6 twisted pair cabling channel, referred to as 1000BASE-TX.

The purpose of this document, 1000BASE-TX, is to provide an Ethernet physical layer specification that is low complexity and can easily be implemented by many vendors. This will take advantage of the improved transmission parameters provided by Category 6 cabling.

It was believed by the members of this project that a much simpler solution for data rates of 1000Mb/s operating over a 100 meters of Category 6 UTP cabling would be a benefit to users who migrate to the higher data rates. It would eliminate the complicated requirements in the 1000BASE-T standard of canceling the effects of crosstalk and return loss, providing a solution that could operate at a much lower power level, the potential for multiple ports per chip, and could be implemented at a lower cost.  As it turned out, the ports became cheap very quickly and so no hardware vendor adopted this standard.

ANSI decided not to adopt TIA/EIA-854. The IEEE also decided not to adopt this and keep with 1000BASE-T as in IEEE802.3ab.

Since there is no application for this limit and it was not adopted by either ANSI or IEEE, it is not in the DTX CableAnalyzer.

Thursday, January 1, 2015

Make Your Internet Faster

How To Make Your Internet Faster (Windows XP, Vista, 7,8)
Slow internet connection is the annoying thing that many people don't want to have. If your internet download speed is slow or your internet connection took long time to load the page, so you are not viewing your Security Camera / DVR. Don't worry today we will teach you how to make your internet faster by change DNS server in the control panel. There are many tricks and tips that also can increase internet speed, but we will show you the effective one.
In here we will walk you through step by step on how to change DNS servers that can increase your internet speed to maximum. Make sure to follow the step correctly for better result.

Step 1 : Open Control Panel

Step 2 : Go to Network and Internet >>> Network and Sharing Center

Step 3 : Click on Local Area Connection >>> Select Properties

Step 4 : Find and double click on "Internet Protocal Version 4 (TCP/IPv4)"

Step 5 : Tick on "Use the following DNS server addresses"

Step 6 : Fill up the DNS server like the same down below :

Preferred DNS Server : 
Alternate DNS Server :


Preferred DNS Server :
Alternate DNS Server : 

Step 7 : Click OK and Restart your computer.

Cleaning Up Your Computer
No matter how fast your internet is, If there are a lot of junk files and temporary files in your system, Your internet speed and system performance will drop. Also, there are many program installed in your computer and running on the background, Those programs that running in the desktop can slow down your internet speed also.

If you have many junk files and unnecessary programs installed in your PC, you should delete them out of your system.

Scan For A Virus

Virus is a main problem that causes your fast internet to run slow. Running your system with a virus can slow down your system performance, decrease your internet speed, and cause many more problems. If there are virus in your system, make sure to scan and get rid of it. You should scan for your system once a week for better security.