| 摘要 |
PURPOSE:To obtain the speech encoding device which can be improved in total sound source encoding characteristics by securing the possibility that a representative sound source, which is good in encoding characteristics and overlooked when a single representative sound source is used, from a frame. CONSTITUTION:When a pitch cycle 14 has a value, i.e., when a current processed frame is a voiced sound, a voiced sound source encoding means 8 extracts plural representative sound sources 16 by a multiple representative sound extracting means 9 according to previously set extraction standards. Then a sound encoding distortion calculating means 10 compares each of the representative sound sources 16, extracted by the multiple representative sound source extracting means 9, with respective code words used for specific encoding and finds and outputs distortion 17 in specific encoding between two, e.g. the least squared distance on a time waveform as to all combinations. Further, a sound source code selecting means 11 selects the smallest distortion among them and outputs a sound source code 19 corresponding to the code word in the case of it. |
