Patent ID: 7711554
Filing Date: 2010-05-04
Classification: G10L

Abstract:
1. A speech packet transmitting method for transmitting an input speech signal on a frame-by-frame basis by using packets, comprising the steps of: (a-1) generating a code sequence by encoding the input speech signal and generating a decoded speech signal by decoding the code sequence; (a-2) generating a compensatory speech signal for a speech signal of a current frame from a speech signal of at least one frame adjacent to the current frame; (b) calculating a first speech quality evaluation value from the input speech signal and the decoded speech signal and calculating a second speech quality evaluation value from the input speech signal and the compensatory speech signal; (c) determining a duplication level based on the first and second speech quality evaluation values, the duplication level being an integer value of 1 or more which increases incrementally as speech Quality of the compensatory speech signal decreases; (d) generating packets for the speech signal of the current frame as many packets as the number specified by the duplication level; and (e) transmitting the generated packet to a network.