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Archive for the ‘IP Video News from use-IP’ Category

IP Video – TV Everywhere

Monday, September 28th, 2009

IP cameras are just one of a number of technologies moving rapidly towards the all-connected world of IP networks.

Check out this article on the BBC Technology website about expected IP TV developments:

We are seeing an amazing move of video to IP (internet) networks.

By 2013 90% of all IP traffic will be video; 60% of all video will be consumed by consumers over IP networks.

Malachy Moynihan, Cisco’s vice-president of video product strategy

And:

It’s about unlocking a whole raft of new capabilities and services. Think of TV as an opportunity to give consumers a gateway to infinite choice.

Eric Huggers, director of the BBC’s Future Media and Technology

IPCCTV Videos

Thursday, June 18th, 2009

IPCCTV manufacturers promo videos at YouTube, Vimeo, etc.

IPCCTV is a complex technical subject and there are almost too many possible solutions to choose from.

We know that our customers like to do lots of research before selecting their network cameras and CCTV recording software so, we have put together a web page to collate all the IPCCTV Video Channels from our Partner manufacturers.

There is a growing trend to use video web services such as YouTube and Vimeo to deliver good promotional videos.

At the time of writing ACTi are obviously an early adopter with nearly two hundred videos on YouTube. Axis only set up an official channel yesterday, and Vivotek uploaded their first videos to Vimeo in the last 24 hrs.

Some of the videos adopt a formal instructive style.

Some are just for fun.

Some have rockin’ soundtracks!

Plainly this presentation medium is going to grow and grow …

Grab a cup of tea, pull up a comfy chair, make sure you’ve got a good broadband connection, switch your speakers on and …

Let the IP CCTV Camera Manufacturers entertain you!!!

We look forward to your comments and feedback below …

Network Camera Bandwidth Calculator

Tuesday, June 9th, 2009

Network Camera Bandwidth CalculatorJVSG, the Joint Video Surveillance Group, have developed a great software tool which helps you to calculate the bandwidth needed for network CCTV cameras.

This is one of the major concerns expressed (typically by IT Managers) when people suggest adding video cameras to their network.

The software can calculate the bandwidth requirements for cameras with all the common resolution specifications and allows you to calculate the effects of varying resolution, frame rates, numbers of cameras, the video compression standard (H.264, MPEG4, MJPEG) etc.

You can even estimate the impact of varying amounts of motion activity in the scene.

See below for more information on the settable parameters, or click the image above to visit their website.

You can download and run a FREE 45-day evaluation copy of this software from their website, and if you decide to buy it’s just £39 to licence the software for continued use.

 

  • Resolution – Camera resolution in pixels. You can select resolution from the drop-down list. The list contains most popular PAL and NTSC camera resolutions (like 352×288 CIF PAL, 704×576 4 CIF PAL) as well as some typical network cameras resolutions (like 640×480) including megapixel resolutions (1280×1024, 1600×1200), HD and full HD resolutions (1920×1080) as well as others.
  • Compression – Video compression. You can choose from MPEG4, H.264, four levels of Motion JPEG (MJPG) compression (from Low to High) and “RAW Data”. If you use Motion JPEG you can use different JPEG compression levels. If you use low MJPEG compression (level 10) you get best quality of picture and about 10 times lower frame size. If you use Medium MJPEG compression (level 20) you usually obtain a good picture quality and an optimal Quality/Frame Size ratio. With a JPEG level of more than 50 your picture becomes bad for video surveillance purpose.
  • FPS – Frames Per Second. Typical FPS for video surveillance system is from 5 to 15 frames per second. In some applications (like CCTV in casino) it is required to use higher speed values (25-60 FPS). Alternative name for FPS is IPS (Images Per Second).
  • Days – Required length of video archive in days (24 hours). Used for storage space calculation.
  • Cameras – Number of cameras in your CCTV installation with the same parameters.
  • Recording % – Estimated motion recording activity. 100% for constant recording. This parameter is used to calculate disk storage space in case the video is recorded on a schedule or on a motion detector.
  • Image Complexity – Frames from some CCTV cameras are more detailed and have a higher frame size.
  • Motion % – Motion activity (100% for constant activity). This parameter is used for MPEG4 and H.264 bandwidth estimation.

IP CCTV Guide Book from Axis

Saturday, December 27th, 2008

Axis provide a 120-page Technical Guide to Network Video – free to download from their website.

Ideal for a bit of light reading in that quiet period between Christmas and New Year.

From the Introduction:

The move to open video systems—combined with the benefits of networking, digital
imaging, and camera intelligence—constitutes a far more effective means of security
surveillance and remote monitoring than has ever been reached before. Network video
provides everything that analog video offers, plus a wide range of innovative functions
and features that are only possible with digital technology.
Before setting up your own system, you need to consider what features are required.
It is equally important to consider factors such as performance, interoperability,
scalability, flexibility and future-proof functionality. This guide will walk you through
these factors, helping you to achieve a solution that fully takes advantage of the
potential of network video technology.

Feel free to ask any IP CCTV queries at our IP CCTV forum.

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We’d be delighted to have you sign-up for our email newsletter and allow us to keep you informed of the latest developments in this fast-moving sector.

Or feel free to Contact Us for any other help or information.

Power Over Ethernet

Thursday, November 27th, 2008

Power over Ethernet (POE) allows you to very simply install network cameras (or other network devices such as VOIP phones) with just a single network cable.

We get a lot of queries about POE, so we’ll try to give you a quickand simple explanation:

An ethernet network is the standard format of network cabling that you use to connect your networked and other devices.

The cables used are commonly known as Cat5 cable (other variants such as Cat5e and Cat6 are available).

The plugs on the ends of the network cables are terminated in RJ45 connectors.

Each Cat5 network cable contains four pairs of cable cores, all of these cores are terminated in the RJ45 plugs, but only two of the pairs are actually used for the transmit and receive signals used by the network for data transmission.

This means that there are two pairs of spare cable cores available within every network cable.

Quite simply these can be used to carry power, electricity, volts & amps to devices on the network.

There’s an IEEE standard governing the proper format and use of Power over ethernet, and the basic version of this is the 802.3af standard. This standard governs things such as the configuration and use of the spare cores and the voltage used being common in all 802.3af compliant devices (nominally 48 volts DC). This relatively high voltage is used to enable the power feed to be useful over relatively long distances – up to 100m. If a lower voltage was used, the voltage drop caused by the cable length might render the even lower voltage arriving at the far end useless for powering the camera.

So, you can take a device known as a poe power injector and place this at the source end (PC, control room …) and route your network cable through the power injector on its route to the camera.

At the camera end, if the camera is a POE enabled device (has 802.3af compliant POE built-in) you can plug the far end of the network cable directly into the rear of the camera and the internal camera circuitry will split-out from the network cable the power that it needs to operate. In this way just a single network cable is all that is required to both feed power to the camera and to take the IP video signal away from the camera and back to the PC or other recording device.

This Power Over ethernet solution makes for really simple low-voltage installations without the need for a specialist electrical installation contractor, or the requirement for mains or other power cables. Hence, you save not only labour costs but also the cost of a second copper cable.

If the camera or network device does not have built-in POE compatibility, it is still possible to use Power over Ethernet by deploying a device called an Active Splitter at the camera end of the network cabel. An active splitter (as the name implies) is simly an electronic gadget which splits the power and data signals from the one combined network cable to the two cables that a non-POE device requires; one cat5 for data, one power for the camera supply. NB if you are using a splitter be sure to select a device which is able to transform from the 48V carrier signal used in POE down to the correct voltage for the camera you are using (likely to be 3.3V, 5V, 9V, 12V or similar) and is able to present the power in the correct physical format to plug into the rear of the camera e.g. 4.5mm barrel connector.

So, as you can see from the above, the basics of power over ethernet are simple, but there are a few potential pitfalls to catch out the unwary. If you need any help with selecting the correct POE devices for your application please just give us a call.

use-IP Ltd supply a range of POE devices.

Further explanation of Power Over Ethernet

Wikipedia