Category Archives: Industrial News

Difference Between DDNs & P2P

Difference Between DDNs & P2P
Router Support uPnP Yes No
Port Mapping Yes No
Operation Complicated Simple(only one UID and password)
Penetrating 100% Bounced Back 95% Penetrating, 5% bounced back
Coded Audio & Video transmission No Yes(AES128)



How P2P Transmission Technology Contribute to IP Camera

How P2P Transmission Technology Contribute to IP Camera

Posted on May 23, 2013 by xiaojun

     In recent years, the network video surveillance system has become increasingly popular. It enjoys high favor not only in the public security market, but also among more and more families and individuals. However, the monitoring needs of the latter are obviously different from the former. The monitoring needs of families and individuals are mainly reflected in the following aspects:

1. The demanding quantity of IP camera is small, usually for one family, one or several IP cameras are enough to use.

2. Neither special monitoring client nor long time monitoring is needed.

3. Usually, the monitoring client and the IP camera are on different networks. For example, the IP camera is at home, while user watches the video at work or through smart phones.

4. There is small probability that many people watch the same video at the same time.

5. Continuous and long video recording is not necessary. In most times, videos and snapshots are set to record by motion detection or others forms of alarm. At the same time users are reminded through alarm emails and messages.

From the above analyzing, we can see that there is a huge difference between the monitoring needs of families and the public security part, which decides that the IP cameras for civilian use must adopt different technique method. The reason is that:

  1. Since the IP camera and the monitoring client (PC/ smart phone) are on different networks, there is a firewall between them, so they cannot be accessed directly through IP address.
  2. There is a huge amount of IP cameras which belong to different users. If a central sever is applied to forward, it will need quite a number of forwarding severs on the Internet. The cost is very high.
  3. The IP camera must realize the function of plug and play to avoid the complicated settings and installation; otherwise the cost of after-sales service will be much too high.

Good news is that MOST IP CAMERAS has finally made a breakthrough on this problem, established a direct data transmission channel between client and IP camera and made the P2P transmission possible.  LIKE OUR model “IP-129HW”



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What software do I need for my IP Camera?

What software do I need for my IP Camera?

Starting with a question- what software do you (probably) already have? Correct- some flavour of Microsoft Windows, and Internet Explorer.  That means that for like 90% of IP Camera, you already have MOST of what you’ll need.
Unfortunately for linux or BSD or other OS-users (AIX?), it’s gonna tough for you to use an IP Camera unless you’re particularly handy and clever. Even in Windows, its not always easy.
The main challenge is the video content, and how to display it. I see ACTIVE-X as the most common transport, which is both good and bad. The bad news- you probably don’t already have a compatible copy of Active-X on your system, which means you have to load it. Luckily you’ll probably get prompted to load it (if not you may have to fiddle with IE Security settings).
The other problem is, many suppliers offer unsigned-copies of Active-X, which likely means even MORE fiddling with security settings to get it loaded. In IE these settings are found in the CUSTOM ZONE menus. Look for the radio buttons that allow prompting for download of Active-X in various states (ie, unsigned).
Life can be a bit simpler if you need less functionality, and you elect another transport like server push, or VLC. Those may also need plug-in installs, but they can be less-daunting than Active-X.
If you’re actually INSTALLING the camera, you may also need the software from the camera seller, provided on CD, DVD, or downloaded from their site. It seems that unlike modern routers, you can’t just plug the camera into a CAT-V cable, type 192.168.1.N into a browser, and voila there it is! Loftek and others provide *discovery software* that sort of locates the camera, and leads you through some steps to do preliminary configuration. I believe much of this will soon vanish- early routers had this same issue, but quickly evolved past it. But for now you may need to install and run this from the Camera’s CD or website.
There are various other utilities and software you might need such as DDNS-disable, net-config, etc. These should be described on the camera webpage, or in the manual.
Once you’re set up and stable, you won’t need to worry about all of this again unless your settings go haywire. Pray that doesn’t happen!

What Can My IP Camera DO Besides Showing me Images?

What Can My IP Camera DO Besides Showing me Images?

Good question.

If you’re not a surveillance company glued to a wall of monitors, you probably don’t have time or patience to sit and watch your IP Camera 24×7. And if you watch even an hour a day, you’re only monitoring about 4% of the time.

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But you’re in-luck (probably), because many contemporary IP camera offer tools for round-the-clock monitoring. Here are some:
1. Motion Detection (MD): Many IP cameras can detect motion, which in-turn triggers an event.  An event might be turning on a siren, or texting a photo to your phone.
Motion-detection can be difficult to *dial-in* however, since you have to set thresholds. You have to instruct your camera how much of the image has to change, in how little a time-span, to trigger. With pets walking about, branches waving in the wind, rainstorms, too-low a threshold can produce false triggers. And too high can miss real events.
So MD is useful but you may have to experiment to get the camera isolated from false triggers, and also experiment with thresholds.
2. FTP: your IP camera may support FTP, where an image is sent to a disk on some interval, or on a trigger like MD. Like a *poor-man’s-DVR* this is essentially a slide-show view of the scene.
Some FTP systems can also transfer video clips, or even audio clips.
3. EMAIL: Your camera can email you. This service can be difficult to set up as it seems to require an SMTP(Mail Service) server, but it can be done with some config settings. If you set up your pop-client on your PC, you can probably set up this.
4. Two-way audio: You can broadcast audio TO The camera area with your cellphone or PC microphone. Why would you want to do THAT? Say Fido has been getting into your garden digging it up while you’re at work? You set up MD on the garden, get an alert, look at your cell, and THERE Fido, digging.
You get into your IP Camera phone ap, press TALK, and say GET OUT OF THERE FIDO!
FIDO looks totally confused, and wanders off.
Of course there are far more sinister activities you can intercept, such as a burgler. I’m thinking Mr Burgler hears STAY RIGHT THERE, I’M LOADING THE SHOTGUN out of the darkness, he’s headed for the nearest door!

What is DDNS and Why Do I need it?


DDNS stands for Dynamic Domain Name System.  This is a very-tekkie discussion of DDNS, in more detail than previously presented.
Each website, FTP site, device, and even your cable modem, has an Internet ADDRESS. This address is how the Internet locates nodes, aka computers, or routers, or anything else that might hang on a CAT-V cable [1].
The numbers aren’t *too friendly* however. They’re hard to remember and for the most part, meaningless as far as their significance. Think about it. If your friend says
Did you check out my latest pix on
You’ll be like HUH? But if they instead say
Did you check out my latest pix on Facebook??
THEN you’ll know what they mean right? Well on the INTERNET, FACEBOOK is the domain NAME (at least part of it), and is the Internet address for that name. This might be called the IP Address, or even the WAN address.
So they have to have a system that can TRANSLATE a name into an address,  so when you enter FACEBOOK into your browser, it knows to send you to , and that’s what a DNS or Domain Name Server, does. This is called NAT, or Network Address Translation.
So that’s a little bit of background for you.  Now what about DYNAMIC DNS (DDNS)?
You actually could get a NAME and a FIXED IP ADDRESS [1] for your camera, and never worry about DDNS. But for most of us, that’s impractical. A fixed address is expensive. So instead let’s look at DDNS.
Your CABLE or other type of provider temporarily assigns an IP address to you. They own a pool of FIXED UP Addresses, which they dole out to their subscribers on a round-robin or other type of sequence. So when you woke up this morning, your IP address could potentially be different than it was when you went to sleep.
In practice they don’t really change that often. If your router hasn’t been off line, its possible to have the same IP Address for weeks, or months. In that scenario, you might consider just using the current IP, not worrying about DDNS, and resign yourself to having to adjust it ever month or two. Or six.
But if you want your Camera to automatically be ADJUSTED to use the new IP address, then that’s where DDNS shines.
Here is how it works.
You sign up for a DDNS service. There are dozens. Some are free, some charge $1-2 a month, others more. One caveat- your selections may be limited by your camera or router, read on..
Next, you need to configure one of your devices to *talk to* your DDNS provider. You can locate DDNS settings in your router, camera, and even on some computers.
Then you configure it to tell your DDNS provider about your IP address. When it changes, it tells the DDNS provider, and it adjusts your NAT (Network Address Translation) so someone who types in ALWAYS finds you, even if your address changed.
For details on settings at both the DDNS provider and your router or camera, you’ll have to consult the associated guides. They’re all different.
But the part to remember is that many devices can only support CERTAIN DDNS providers. You’ll find the list in that guide. Be sure to select one in the list. The other important thing is that you only need ONE device to communicate to the DDNS provider, so you can select it based on which is easiest to configure, which is always-on (like your router), etc.
With lots of study and some trial and error, you can set-and-forget this and never have to worry about it again (hopefully!)..

What is analogue cameras and IP cameras?

ANALOG CAMERAS – These are your standard type of security camera. Analogue signals can also be converted into a digital signal to enable the recordings to be stored on a PC as digital recordings. After the signal is converted to digital, it can be recorded through the use of a digital video recorder (DVR). Such a device is similar in functionality to a PC with a capture card and appropriate video recording software. Unlike PCs, most DVRs designed for CCTV purposes are embedded devices that require less maintenance and simpler setup than a PC-based solution, for a medium to large number of analogue cameras.

IP CAMERAS – A growing branch in CCTV is Internet Protocol Cameras (IP Cameras). IP cameras allow homeowners and businesses to view their camera(s) through any internet connection available through a computer or a 3G phone.

IP cameras are Closed-circuit television (CCTV) cameras that use Internet Protocol to transmit image data and control signals over a Fast Ethernet link. As such, IP cameras are also commonly referred to as network cameras. IP cameras are primarily used for surveillance in the same manner as analog closed-circuit television. A number of IP cameras are normally deployed together with a digital video recorder (DVR) or a network video recorder (NVR) to form a video surveillance system.

The terms IP camera and network camera are most commonly used to refer to surveillance cameras with a Fast Ethernet interface. In this context, the term IP camera does not include GigE vision camera, which is a machine vision camera with a Gigabit Ethernet interface. Internet Protocol is a protocol used for communicating data across a packet-switched network using the Internet Protocol Suite, also referred to as TCP/IP. As with digital still cameras, the resolution of IP cameras has increased with time. Megapixel IP CCTV cameras are now available at resolutions of 1, 2, 3, 5 and even 11 megapixels. Today there are many manufacturers of IP cameras. IP surveillance equipment vendors include both specialized digital imaging equipment manufacturers and larger manufacturers that are active in consumer, broadcast, and security video.

MEGAPIXEL CAMERAS – In some situations where standard-definition video cameras (either analog or digital) are used, the quality is going to be poor because the maximum pixel resolution of the image chips in most of these devices is 320,000 pixels (analogue quality is measured in TV lines but the results are the same); they generally capture horizontal and vertical fields of lines and blend them together to make a single frame; the maximum frame rate is normally 30 frames per second. That said, multi-megapixel IP-CCTV cameras are becoming more popular. They can capture video images at resolutions of 1, 2, 3, 5 and even up to 11 Mpix. Unlike with standard definition (digital or analogue) cameras, details such as license plates are easily readable. At 11 Mpix, forensic quality images are made where each hand on a person can be distinguished. Because of the much higher resolutions available with these types of cameras, they can be set up to cover a wide area where normally several analogue cameras would have been needed.

Cameras and video recording systems offer a high level of security.

Having the ability to capture a crime in progress will greatly help the authorities convict the suspects. We have all seen video footage on the news of crimes captured on video.

Video surveillance is the best way to monitor activity on your premise, regardless if you are there or not.

Systems now offer more then simple recording. With the new technology, you can remotely assess your camera system on the internet. Some offer access with your 3G phone. Digital Video Recorders (DVR) can also alert you of events via email. Event emails can be directed your mobile phone. Video surveillance has come a long way from the days of the VCR tapes.

At G&A Lock and Security, we offer many solutions to be able to monitor your premise with video technology. We are a Bosch dealer and have had much success with their premium camera technology.

As there is an extremely wide range of video technology for your security needs, we will help find the solution that is best fit for you and your budget. Have one of our security specialists help you with a free consultation.

Securing your premise with a video surveillance system is a step to greater peace of mind.

1200TVL CMOS image sensor CCTV cameras,Which one is better?


CMOS sensor’s  sensitivity are normally in the range of 6 to 15 lux. CMOS sensor have 10 times more fix pattern noise then CCD sensor. Fixed pattern noise is the kind of noise that stay on screen as if there is a patterned. As CMOS sensor will become useless under 10 lux. All camera for serious application are using CCD sensor. CMOS sensor are normally using on  toy or very low end home security.
There 2 exception.  CMOS sensor can be made very big and have same sensitivity as CCD sensor. CMOS sensor are very fast , it is 10 ~100 times faster then CCD sensor, so it is very good for special application such as high ens DSC camera ( Cannon D-30 ) or fast frame camera.

CMOS sensor can have all the logic and control circuit be build on the same silicon wafer dice so as to make the camera simple and easy to handle. Hence CMOS camera can be very small in size.
CMOS camera though consume same or more power then CCD sensor but CMOS sensor use less peripheral circuit such as  CDS, TG and DSP circuit, so the total power consumption is 1/2 to 1/4 less then a CCD camera on same size.
There is only one exception that Mintron C series camera is using only 12V/65 mA power which is almost same as CMOS camera but having much better image quality. C series camera using 0.35um 3.3v DSP hence consume very
 small power  ( 54C0,54C1,54C2,54C1,54C5,54C6) . All other CCD camera making by other company are consuming 12V/150~300mA, hence is 2 to 4 times more then CMOS camera that is on 5~12v and 35~70 mA

Ironically, although CCD stand for  “Charge Couple Device” and CMOS stand for “Complementary Metal Oxide Silicon”  but actually neither CCD nor CMOS have anything to do with image sensing. The actuarial sensor is a device called “Photo Diode”  Both CCD sensor and CMOS sensor ( as so called ), are actually using same kind of sensor called Photo diode. Photo diode is a P N junction diode that will convert photon of the light that is bombing the junction into proportional amount of electron. The amount of electron are them calculated and read as voltage of signal. The more the light that entering the photo diode the more the electron generated and the higher the voltage out put from the sensor.
CCD stand for  “Charge Couple Device” , CCD actually is only the technology to store the electron charge and the method to move these charge out of photo sensor in and organized way.
CMOS stand for “Complementary Metal Oxide Silicon” . CMOS actually is only a technology to make transistor on silicon wafer, and have no further meaning. Sensor being called CMOS sensor was a convenient way to discriminate it from CCD sensor and have nothing to do with the real ways that the sensor handling image. 

CMOS sensor convert electron generated by photo diode into voltage signal immediately without complicate process. hence it is much faster. This good point makes CMOS sensor very useful for fast frame camera, the frame speed can be as high as 400 ~2000 frame/sec. This point makes it very good for high speed moving object survey. however due to lack of good fast speed DSP there are little high speed camera on the market and are normally very expensive $3000 ~ 300,000 per unit. Mintron makes  75 frame CCD camera which is 3 times faster then PAL TV standard on 25 frame/sec. and it is the physical limit for a CCD device.