| 摘要 |
The invention concerns a decoder ( 2 ) comprising a first input for receiving a coded flow of second binary elements (Yd). It comprises a second input for receiving channel properties ( 1 c) designed to define probabilities of receiving second binary elements, upon transmitting first binary elements, a first module ( 12 ) defining a source model ( 8 ) adapted to define the probabilities for x-ray symbols associated with transitions between source states in a source state diagram, a so-called product model ( 7 ), adapted to define a correspondence between the x-ary symbols and the first binary elements produced in a product state diagram, a product state being a function of a source state, a processing module ( 6 ) adapted to calculate probabilities of decoding x-ary symbols, knowing bits of the coded flow of second binary elements from the channel properties ( 1 c) of the source model ( 8 ) and of the product model (7), and adapted to reconstitute the most probable flow of x-ary symbols from said computed probabilities.
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