A method of transmission by a surveillance device to a control room, via a telecommunications network, of a series of images, includes steps, implemented by the surveillance device, of acquisition of a series of images, of coding of the series of images acquired into a series of base video frames including a first quantity of information and into at least one series of enhancement video frames of the series of base video frames, the series of enhancement video frames including a second quantity of information making it possible to enhance the quality of the series of images coded into the series of base video frames, of transmission in real time via the telecommunications network of at least the series of base video frames to the control room, and of storage of at least the series of enhancement video frames.