Videoconferencing transmits video, audio, and data across a communications network enabling geographically dispersed participants to meet synchronously. Videoconferencing hardware is required at each site participating in a video call. Additional options should be considered, but at a minimum, the equipment listed above in a standards-based system is required. Video Conferencing is tool that provides a Virtual meeting environment that gives you the benefits of real meeting. Video Conferencing means movements of Video, audio and data using standard communications networks. A videoconferencing uses telecommunication of audio and video to bring people at different sites together for a meeting.
The components required for video conference system are:
1. Video input: video camera or webcam
2. Video input: video camera or webcam
3. Audio input: microphone
4. Audio output: speakers
5. Network: LAN or internet
Elements of explaining videoconferencing further include:
· How Videoconferencing Works
· The Picture Quality of a Videoconference
· The Sound Quality of a Videoconference
How Videoconferencing Works:
Each site has real-time interactive audio and video connectivity so that you can meet people from around the world face-to-face without leaving your office. Videoconferencing functionality is a cyclical process. The process cycle below provides a basic explanation of how video and audio are compressed through the network. During a videoconference, video, audio and data are compressed and transmitted via an IP network connection by a codec. The codec will “code” the analog visual signal received from the camera, compress into the amount of bandwidth available and then “decode” or decompress once the video, audio and data have been transmitted to the other site. The connection is a 2-way synchronous connection between two or more sites.
The picture quality of a videoconference:
The picture quality of a videoconference is dependent on 3 contributing factors: network bandwidth, frame rate and hardware selection. The more network bandwidth available, the faster and better the audio, video, and data packets can travel thus improving the picture quality. Most videoconferencing systems transmit at 30 frames per second (fps). This “refreshes” pixels within the picture 30 times every second to keep up with the movement. Lastly, business-class cameras and displays impact picture quality.
The sound quality of a videoconference:
The audio stream in a video call is actually delayed to arrive simultaneously with the video to maintain lip synchronization. The audio quality is dependent upon network bandwidth and business-class hardware as well. Proper placement and selection of speakers and microphones for a particular room environment can greatly impact audio quality.
Advantages of Video Conferencing:
1. Increase Productivity: We spend less time travelling-more time in your office-you have access to your resources file and rest of the thing gives access to limited ‘people’ resources. We all talk to each other more often, sharing information more frequently
2. Respond more quickly
3. Decreases direct meeting costs.