MAPPING DEVICE AND METHOD, PROBABILISTIC SIGNAL POINT SHAPING DEVICE AND METHOD

Circuitry configured to map data blocks of input bits of a first input bit stream onto first mapping symbols distributed according to a first probability distribution and represented by first signal points, analyze the probability of occurrence of the first signal points representing the first mapping symbols and/or earlier final mapping symbols, determine a second probability distribution to be applied for mapping second input bits of a second input bit stream onto second mapping symbols, said second probability distribution determined based on the analyzed probability of occurrence to obtain a desired final probability distribution of final mapping symbols, map data blocks of input bits of a second input bit stream onto second mapping symbols, wherein said second mapping symbols are distributed according to said second probability distribution and represented by second signal points, and combine the first mapping symbols and the second mapping symbols into the final mapping symbols.