FIELD: error correction coding. SUBSTANCE: device includes convolutional encoder and punching unit. Convolutional encoder forms subgroups out of first, second and third coded symbols per each input bit with the aid of generated polynomials for entry of input bits to form symbol group of three subgroups of input bits following one another and to form stream of these symbol groups. Symbol punching unit punches first symbol of one of three subgroups in each symbol group formed by convolutional encoder. EFFECT: design of reliable device and method for convolutional coding. 12 cl, 3 dwg, 4 tbl
