1. A method of encoding a 2D video signal including a 2D video image with conversion data to assist in converting the 2D video signal to left and right eye images for stereoscopic display, comprising: adding conversion data to a video signal including a 2D video image to provide an encoded signal for transmission to a receiver, the conversion data defining displacement of respective points of the 2D video image and enabling the conversion of the video signal including the 2D video image into a left image and a right image suitable for a stereoscopic display and allowing the displacement of the respective points to be adapted at the receiver such that adaptation to the displacement varies among the respective points, each of the left image and right image being different from the 2D video image, each of the left eye image and right eye image representing the same instant in time as the 2D image.