What do the parameters of video conference cameras mean?

Nowadays, video conference has become popular in our daily business meeting, it allows people worldwide to have a meeting without long travel and high expense.

Definitely, a good video conference cameras can make you a good video conference system, bring you great meeting experience. But how to choose a good video conference camera? Here we will introduce the main parameters of the video conference cameras for you. To understand the main parameters of the video conference cameras can offer a good reference when choosing your video conference solutions.

There is the image sensor, effective pixels, lens, horizontal view angle, signal system, resolution, minimum illumination, image effect, signal to noise ratio, preset position, output, and control protocol. Let check one by one.

Image sensor: the most used image sensors are CCD and CMOS, it is the most important part of video conference cameras as well as other cameras, without image sensor, the cameras will not able to capture the image. Normally, there are 1/2.8”, 1/1.8”, 1/2.5”, 1/3”, 1/4” image sensors, the bigger, the better. The brand image sensors are SONY, PANASONIC, SHARP, A1(L.G.), SONY is of the highest quality, but note: I AM NOT MEAN THAT THE CAMERAS ARE GOOD IF IT USE THE SONY IMAGE SENSOR, it actually depends on how good is the manufacturer.

Effective pixels: it is the real pixels that involved in image producing, the bigger, the better

Lens: it is a must part of cameras, the quality of lens affect the quality of the image. Here we need to consider the optical zoom of the lens based on your demands. The bigger of the optical zoom, the longer image you can capture.

Horizontal view angle: The bigger of the angle, the wider you can see, but it will be the close shot; The smaller of the angle, the more narrow you can see, but it will be the long shot.

Signal system: there are two main signal systems in the world, NTSC (National Television System Committee) and PAL (Phase Alternating Line), it is television broadcasting system, PAL is mainly used in Europe, China, Middle East, and Hong Kong, NTSC is mainly used in Japan, America, Mexico, Canada and so on, To use what kind of system depends on where you are and what your device support.

Resolution: normally we can see 1080P, 720p, 480p, these all refer to resolution, High definition means the resolution is more than 720p, or it is standard definition. The higher of the resolution, the more clear of the image.

Minimum illumination: illuminance is a way to measure the sensitivity of the cameras, it measures what the darkest condition is that the camera can capture images, use LUX as the measurement. The lower of the Lux, the darker that the cameras can work.

Image effect: it means what kind of image effect that the camera can support, normal options are color, Black and white, Electronic flip.

Signal to Noise ratio(S/N): Signal voltage and noise voltage ratio, noise includes power clutter, random clutter, single-frequency clutter and so on. The standard is 45-55 dB, for video conference cameras, if S/N is about 50db, it is good.

Preset Position: Preset position is very important in the meeting that gets the “big guy” involved or for the big conference or live show, it can allow you set up the position you want the camera to direct in advance.

Output: Normal output has HDMI, SDI, USB, VGA and VIDEO, it depends on your demand and the output interface of your current device.

Control Protocol: For video conference telecommunication, the control protocols are VISCA and PELCO P/D, they are standard protocol in this industry. And we often use RS232 control cable under VISCA, you only use series connection if want to use more than one cameras under VISCA, and the most you can connect is 7pcs cameras. But under PELCO P/D, you must use the parallel connection, there are no limits on the number of cameras you can connect, we use RS-422 OR RS485 cable, this cable can transfer information for thousand meters, but RS-232 cable only can transfer within 15 meters.

I believe you can choose the most suitable video conference cameras for your business now. If you have any further questions or find any errors, please feel free to contact, our professional engineers can offer free consultant for you.

video conference cameras

Have you ever wanted to use monitor cameras as video conference cameras?

There is always a question from our customers–Can we use the monitor system to replace the video conference system? They just think the monitor system is much more normal in our daily life, but don`t know they are actually two things.

So, Can we use the monitor cameras to replace the video conference cameras in video meeting? The answer is NO.

Before we go to the similarities and difference between monitor system and video conferencing system, we need to know some conceptions.

1, What is video conference system?

Video conference system is a system using two-way interactive communication delivered by Internet technologies that allow people at different location to come together for a meeting

2, What is video monitor system?

Video monitor system consists of monitor cameras, data transmission, control, display, and record part. It allows the administration to accurately observe, check and study the monitored area, offering the real-time images for the secuirity system.

After knowing the basic definition, let`s see the similarities between the two systems:

  • Similar system structure:

Both of the two systems consist of audio and video acquisition equipment and class server equipment. For video conferencing, they are conference terminals and MCU (multipoint control unit) device; for video surveillance, is the camera and hard disk recorders (or PC server).

  • Same standards for video transmission and audio transmission:

Video conferencing systems and video surveillance systems are basically compressed video compression standard using MPEG4 or H264, and audio transmission is basically used g.279 or some of the higher compression audio compression coding

  • Same transmission medium

Video conferencing systems and monitoring systems are transmitted through the network, so the transmission medium is the same

What is the difference?

  • The equipment is different

For video conferencing, there must be video and voice acquisition systems, and integrated network components, audio, and video can be transmitted directly through the network, do not need to be stored; But video surveillance contains more equipment, audio capture is not necessary, but the storage part is a must.

  • Different usage

Both systems are created to meet different demands, which determines they are different. Video conference is to meet the demands of enterprises or companies to have a meeting with people in different places; video surveillance is to monitor the real-time status of security.

  • Different functions:

For video conferencing system, besides video real-time display, there are also interactive, training, voting and data transfer functions, such as transmitting a conference PPT to other meeting people; video surveillance need to achieve real-time video transmission, video storage, alarm processing, motion detection, and video playback at the same time.

  • Using in different place

Video conferencing equipment deploys the conference room with better conditions; but the deploying places for monitoring system equipment, especially the camera, are much more than video conference cameras, and the monitor cameras can still work at the outdoor harsh environment.

  • Different cost

The cost of Video conferencing system is much higher than monitor system.

If you want to know more about video conference system or need a solution for your video conference room, feel free to contact, I can help with this.

If there is some mistake or you want to talk more, please don`t hesitate to contact us, our engineers can offer free technical support for you.

video conference camera

What is the difference between optical zoom and digital zoom?

Video cameras have become a normal thing in our daily life, but do you know there are optical zoom and digital zoom for cameras? And do you know the difference between them? Here is something you need to know.

Actually, the digital zoom is not a real zoom, the definition is that digital zoom is to use the processor of the camera to raise the pixel scale inside the image to get it enlarged. The principle is to use software to work out what the color is surrounding the existing pixels, then add the similar pixels by the special algorithm.

Advantages:

  • Low production cost (the camera price will be lower)
  • It can help the photographer to blur the background and achieve some article effect

Disadvantages:

  • Not the real zoom
  • The resolution and image quality will be damaged when using digital zoom, so the image will become blurry.

What about the optical zoom?

Optical zoom is to change the position of the lenses in the zoom lens to get the good focal length to enlarge the image. The principle is to enlarge the objects by changing the position of lens, objects and the focus. The bigger is the optical zoom, the longer you can photograph.

Advantages:

  • It is the real zoom
  • The image will keep high resolution and clear

Disadvantages:

  • The cost is higher than digital zoom as it is to zoom by the hardware device

(The image effect of optical zoom and digital zoom for your reference)

Today’s cameras all have optical zoom and digital zoom, if you are just daily use, normal cameras with small optical zoom are enough; if you want to photograph long distance objects, you need to take care of the optical zoom of the cameras. And for video conference cameras, you need to consider the optical zoom according to the scale of your conference room or your purpose to the use the conferencing cameras.

If you have any further questions or find any mistakes, please feel free to contact, I would be happy to discuss with you. Thanks for your reading and have a good day!