Abstract: The invention relates to a method for dynamic quantization of an image stream including transformed blocks, the method comprising a step for establishing a relationship (V12, V10, V20) between at least one temporal predictive encoding source block (330, 323) of a first image (B1, P2) and one or more reference blocks (311, 312, 313, 314, 316, 321, 322, 323, 324) belonging to other images (I0, P2), the method comprising, for at least one of said transformed blocks, a step of quantization of said block wherein the level of quantization applied to this block is chosen (402) at least partly as a function of the relationship or relationships (V12, V10, V20) established between this block and blocks belonging to other images. The invention applies notably to the improvement of video compression in order to improve the visual rendition of encoded videos.

Abstract: The invention relates to a method of and a device for processing digital images. The device is such that, the images being transmitted from a server to a decoder using various modes of display, the images being coded in a dependent manner such that the coding of a first image is used to code a second image. The method is such that the order of transmission of the images from the server to the decoder is determined as a function of the dependence of these images and the mode of display requested by the decoder.

Abstract: A radiation emitting device, such as an LED, is optimally driven in dependence on the value of a carrier frequency of a signal to be transmitted. The current provided to the radiation emitting element is controlled responsive to the carrier frequency. When using an LED, the current value is increased with decreasing duration of current flow. The apparatus is usable for remote controls suitable for controlling two or more devices.