Abstract: A door intercom for a dwelling, the intercom comprising a street panel and an indoor set, the street panel being provided with a call button and being connected to an electric latch fitted to a door of the dwelling, the street panel including a radio transmitter and receiver, means for recognizing a latch-opening code received by the receiver, a stand-alone electrical power supply, and means for activating the electric circuit of the latch. The street panel also includes means for controlling electricity consumption firstly to put the street panel in a standby state in which its electricity consumption is practically zero while waiting for the call button to be pressed, and secondly to put it in an active state enabling a sound link to be established with the indoor set, and enabling the electric circuit of the latch to be activated when the latch-opening code is recognized, and the means for activating the electric circuit of the latch have the necessary amount of electrical energy available.

Abstract: The invention relates to a process for multiplying a stochastic value at the most equal to 0.5, by a number 1+K, with 0<K.ltoreq.1, which stochastic value is physically represented by a sequence of logic 0 and 1 levels, such that in a certain interval of time, N logic 1 levels appear, according to which process, a first auxiliary sequence is formed from said sequence, comprising KN logic 1 levels, then a second auxiliary sequence comprising N logic 1 levels, each logic 1 level of each of the two auxiliary sequences being on the one hand deducted from a logic 1 level of the initial sequence and on the other hand temporally opposite a zero level of the other auxiliary sequence, after which said auxiliary sequences are added to each other. The invention is more particularly applicable to the stochastic processing of information.

Abstract: The invention relates to a process and device for simultaneously obtaining a plurality of stochastically coded constants, wherein a passive memory is programmed so that the number of logic 1 states of the bits, which belong to the same column of said memory and which correspond to different stored words, divided by the number of said columns, is equal to one of said constants, said memory is addressed by means of a random noise of probability equal to 0.5 and the random sequences of bits are taken from the memory column by column. The invention is applicable to the stochastic processing of information.

Abstract: The present invention relates to a binary random noise generator for the stochastic coding of digital or analog information, comprising a comparator having two inputs, one of which receives a reference voltage and the other a random analog noise coming from a source of noise, said comparator supplying at its output a binary signal with random transitions, said generator comprising a clock and a logic system which, on the one hand, effect the sampling of the binary signal with random transitions in synchonism with the frequency of said clock and, on the other hand, ensure the strict equiprobality of the two logic states of said binary signal with random transitions, without increasing the radius of correlation. The invention is more particularly applied to the stochastic coding of information with a view to calculation or transmission, with equidistribution of binary variable.

Abstract: The present invention relates to a device for producing an analog noise from a point process, the distribution of said noise being predeterminable, said device comprising a source of noise, a first generator or random pulse generator, a second generator or motif or function generator, the output of the source of noise being connected to the input of the first generator, the output of the first generator being connected to the input of the second generator, and the output of the second generator constituting the output of the whole of said device. The invention is applicable to the coding and transmission of information.