FIELD: voice signal processing. SUBSTANCE: vocoder has digital signal processor designed for computing recursive convolution and for yielding result of this recursive convolution as well as minimizing processor separated from digital signal processor and used for receiving mentioned result of recursive convolution and for executing minimization search according to recursive convolution results; minimizing processor interrupts search execution when criterion of minimum is satisfied. EFFECT: reduced number of processing cycles. 15 cl, 12 dwg, 4 tbl
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