Camera and Auxiliary Video Inputs | Telepresence

There are three types of video inputs on the codec:

• The connection from the Cisco TelePresence camera
• The connection from the user’s PC
• The connection from the document camera

Although the PC and the document camera are two separate inputs, only one is active at any given time. (Either the PC is displayed, or the document camera video image is displayed.) These latter two inputs will be referred to collectively as the auxiliary video inputs.

Camera Resolution and Refresh Rate (Hz)

The Cisco TelePresence cameras operate at 1080p (1920x1080) resolution with a refresh rate of 30 Hz. The camera sensors encode the video into a digital format and send it down the DVI-HDMI cable to their respective codecs. The left camera is attached to the left secondary codec, the center camera to the center primary codec, and the right camera to right secondary codec.

Note

On single-screen systems, such as the CTS-1000 and CTS-500, there is no left or right, only center.

Auxiliary Video Inputs Resolution and Refresh Rate (Hz)

At the time of writing, the PC video input (VGA-DVI) and the document camera (DVI-HDMI) on the Cisco TelePresence codec operate at 1024x768 resolution with a refresh rate of 60 Hz. The PC must be configured to output this resolution and refresh rate on its VGA output interface. Likewise, the document camera must be configured to output this resolution and refresh rate on its DVI output interface. The majority of PCs on the market at the time the product was designed use 1024x768 resolution and VGA interfaces, although an increasing number of models are beginning to support higher resolutions and are beginning to offer DVI and even HDMI interfaces instead of, or in addition to, VGA. Future versions of the Cisco TelePresence codec might support additional resolutions, refresh rates, and interface types for these connections.

Note

VGA is an analog interface. DVI comes in three flavors: DVI-A that is analog, DVI-D that is digital, and DVI-I that can dynamically sense whether the connected device is using analog (DVI-A) or digital (DVI-D). It is worth mentioning that the first generation Cisco TelePresence codec offers a DVI-A connector for the PC connection. The other end of the cable that attaches to the PC is VGA. So the signal from the PC is a VGA analog to DVI-A analog connection.