Abstract: A method for compressing and decompressing sequences of floating-point numbers includes determining a minimum value and a maximum value of the floating point numbers of the sequence, determining a quantization step value as a function of the minimum and maximum values, compressing each floating point number of the sequence by applying to the floating point number a linear quantization between the minimum and maximum values and using the quantization step value, and inserting each compressed value resulting from the compression step in a binary sequence.

Abstract: The invention regards a method for compressing a hierarchical tree describing a multimedia signal, said tree comprising nodes and leaves, which can be associated to contents of at least two distinct types. According to the invention, said method implements a content compression for at least some of said leaves by means of at least two compression encoding techniques, each of said techniques being selectively associated to at least one of said content types.