Video conferencing is a communications technology that integrates video and voice to connect remote users with each other as if they were in the same room.

Video conferencing is the name given to a conference held using telecommunications, notably the internet. The attendees at a video conference will be filmed so everyone can see everyone who is at the video conference and hear what is being said.

Video conferencing allows attendees from all over the world to come together as if they were in the same room, which is great for multinational companies and organisations where video conferencing offers a cheap and effective solution to getting everyone together for important meetings. Video conferencing saves time and money on travel fees, accommodation and subsistence costs.

The core technology which is used in Video conference is digital compression of audio and video stream significantly. Hardware or software that perform the compression is called a codec. The number of compression up to 1:500

Other components needed for video conferencing system include:
- Video input: video camera or webcam
- Video output: monitor, television or projector
- Audio input: microphones
- Audio output: usually loudspeaker associated with the display device or telephone
- Data transfer: analog or digital telephone network, LAN or internet

Basically, there are two types of of video conferencing system:
- Dedicated systems have all required components packaged into a single equipment, usually it use a console with a video camera.
- Desktop systems add board hardware to a personal computer and transforming them into a video conferencing device.