1. Method allowing a user to specify digital signal processing chains by means of a graphics input and a digital computer with which there is associated a library containing a set of elementary transformations used in signal processing, characterized in that the user structures the data to be processed into at least one table displayed in the form of Cartesian grids (X, Y, Z, T), the dimensions of each table corresponding to physical quantities, in that for each transformation said user graphically compiles an operand application table and a result application table, and chooses from the library an elementary transformation together with the input array and output array, these arrays corresponding to the number of samples defining the elementary function, in that said user matches, for each cartesian coordinate axis, at least two elements of the operand array and of the operand application table on the one hand, of the result array and of the result application table on the other hand, and in that the computer uses the affine relations characteristic of the accesses to the tables for signal processing in order completely to execute the transformation by iterating the elementary transformation as many times as necessary for the result table to be entirely filled with collections of points identical to the collection of points corresponding to the output array.