FIELD: information technologies.
SUBSTANCE: device of transition mode for usage in a voice signal codec with a forecast to develop excitation of the transition mode replacing excitation of an adaptive code bool in the transition frame and/or at least one frame, following transition in a voice signal, comprises an input to receive a code book index; and a code book of transition mode to generate a set of code vectors independent on previous excitation, besides, the code book of the mode is reacting to the code book index for generation, in the transition frame and/or in at least one frame following the transition, of one of code vectors of the set corresponding to the specified excitation of the transition mode; besides, the code book of the transition mode comprises a code book of glottal pulse forms.
EFFECT: increased efficiency of coding.
60 cl, 36 dwg, 10 tbl
