Understanding Video/Audio Input Output Ports on Video Endpoints & MCU

Understanding Video/Audio Input Output Ports on Video Endpoints & MCU

While identifying and procuring a video conferencing solution for your enterprise, codec support, video & content resolution, display etc are very important parameters to be considered, but never neglect to check on the actual physical interfaces required on these Video devices as they are the equally very important. After all, you will be connecting various external video input and output devices to these video infrastructure endpoints.

Some of the video inputs are Video Endpoint Camera and Laptop/Desktop etc while Projectors, LCD Monitors/Displays are few good examples of the video output ports device. Similarly, Microphone arrays etc & stereo line out, in-room audio system etc are audio input and output interfaces respectively on the video endpoints/MCU.

Therefore the count and type of these interfaces become undoubtedly a pre-requisites to check on before finalizing on any video conferencing solution. Many at times, conference room conditions like room size, a number of room participant seats, room stereo arrangement etc play a very vital role while identifying the video and audio interfaces for the video system.

Widely used Video & Audio interfaces are mentioned below for quick reference

video interface

DVIDigital Visual Interface is a video display interface used to connect a video source to a display device, such as a Display. The interface is designed to transmit uncompressed digital video and can be configured to support multiple modes such as DVI-D (digital only), DVI-A (analog only), or DVI-I (digital and analog).  DVI specification is compatible with the VGA interface.VGAVGA is one of the oldest standards among the currently available interfaces. VGA handles video only and not sound works on an analog signal.

interface 2

Source: Polycom

HDMIStands for High-Definition Multimedia Interface supports both digital audio and video down the same cable. HDMI 2.0 can pass video signals with a pixel resolution of 3820 x 2160 at up to 60 frames per second along with up to 32 channels of uncompressed multichannel digital audio.YPbPrUsed for analog component video signals. The three cables ("Y," "Pb" and "Pr") provided a higher quality connection, because the brightness and color components of the signal were carried separately. The YPbPr signals were derived from the red, green and blue (RGB) colors captured from a video camera, and then RGB is converted into brightness and two color difference signals (B-Y and R-Y) for TV/video.

Tags: dvi, vga, hdmi, yPbPr