Flexible broadcasting method of image sequences towards mobile stations and receiver therefor.

摘要

The field of the invention is that of the broadcasting of digital image sequences, and in particular television signals, towards mobiles. The invention relates to a method of broadcasting digital image sequences (10) towards mobiles, characterised in that the data elements (12) constituting the said image sequences (10) are distributed (13) in at least two sets (J1, J2) of complementary data elements, each of the said sets being transmitted independently, a first of the said data sets (J1) making it possible to reconstruct, in first receivers, for example of the small-sized screen receiver type, images of standard quality, and at least one second of the said sets (J2) making it possible to reconstruct, in combination with at least the said first set (J1), in second receivers, for example of the larger-sized screen receiver type, images of higher quality, the said data being transmitted in time-frequency space in the form of symbols consisting of a multiplex of orthogonal carriers. Thus, it is possible to define at least two types of receivers of the transmitted images, in particular as a function of the size of the screen and of the speed of movement of the mobile.