APPARATUS AND METHOD FOR DETERMINING TRANSMISSION RATE WHEN VOICE IS TRANSCODED

摘要

PURPOSE: An apparatus and method for determining a transmission rate when transcoding of voice is carried out are provided to determine the transmission rate by a transcoder using a parameter of input bit stream. CONSTITUTION: An apparatus for determining a transmission rate includes a silence/voice classifying unit(210), a voiced/unvoiced classifying unit(220), a voiced/onset classifying unit(230), a voice classifying unit(240), and a transmission rate determining unit(250). The silence/voice classifying unit classifies an input frame into voice and silence. The voiced/unvoiced classifying unit classifies the input frame into voiced and unvoiced from the input parameter classified as voice. The voiced/onset classifying unit classifies the input frame into voiced and onset from the input parameter classified as voiced based on the class of previous frame. The voiced classifying unit classifies the input frame into stationary voiced and non-stationary voiced from the input parameter classified by the voiced/onset classifying unit as voiced. The transmission rate determining unit determines the transmission rate of the input frame based on the transmission rate and form set for the class corresponding to the classification results.