INTERFACE UNIT BETWEEN VIDEO CONFERENCING CODEC AND INTERACTIVE WHITEBOARD

摘要

A calibration logic unit according to the present invention is configured to at least receive control signals from a touch-sensitive display surface and data signals from a video conferencing codec. The control signals from the touch sensitive display surface identifies an occurred event (e.g. an object touching the touch-sensitive display surfaces) and the location (coordinates x1, y1) of the occurred event. The data signal from the video conferencing codec comprises at least an identification of the current image layout used by the video conferencing codec, and the region in the layout containing a screen image received from a computer. The codec is connected to a projector projecting the codec's output or display image onto the touch-sensitive display surface. Based on the received control/data signals and preconfigured calibration profiles stored on the calibration logic unit, the calibration logic unit calculates a new set of coordinates (x2,y2) identifying the corresponding position of the occurred event on the computers local screen image. A control signal identifying at least the occurred event and the new set of coordinates is generated by the calibration logic unit and sent to the computer.