Real-time wide-angle video communication system

The present invention provides a new method comprising: maintaining a stepwise elimination list containing slices of the current viewport of a wide angle image, said slices being predicted to no longer appear in the viewport after a duration d from the current time t; a slice predicted to be viewed at a certain time after the current time t is acquired. Adding the prediction slices which are not in the receiving list to the receiving list; and performing rendering imaging on the slices of the current visual area according to the receiving list, wherein the slices of the receiving list and the gradual elimination list are respectively associated with respective display time. The rendering imaging comprises the following steps: decoding and displaying a slice in a receiving list, wherein the display time associated with the slice is not greater than the current time t; and stopping decoding and displaying the slices in the step-by-step elimination list, wherein the display time associated with the slices is not