1. A method for 3-dimensional encoding of videos, the method comprising: performing temporal estimation on video taken by a centerly located camera with reference to video taken by the centerly located camera at at least an immediately previous time, when a plurality of other cameras are arranged in a row, with the centerly located camera being at a central position of the row; and performing temporal-spatial estimation on videos taken by the other cameras with reference to previous-in-time videos taken by cameras adjacent to the centerly located camera and the video taken by the centerly located camera at the at least the immediately previous time.