CAJ | 학술논문

为解决语音分段后提取出的LSP参数矩阵维数不固定问题，采用多项式拟合取代段长弯折以固定参数矩阵的维数。方案以降低维数转换引起的谱失真为出发点，对不同范围的段长进行不同阶次的多项式拟合，再对拟合后的矩阵进行量化编码。仿真表明，提出的方案具有相对良好的量化性能。
위해결어음분단후제취출적LSP삼수구진유수불고정문제，채용다항식의합취대단장만절이고정삼수구진적유수。방안이강저유수전환인기적보실진위출발점，대불동범위적단장진행불동계차적다항식의합，재대의합후적구진진행양화편마。방진표명，제출적방안구유상대량호적양화성능。
In order to solve the problem of unfixed dimension of LSP parameter matrix extracted after speech segmentation, polynomial fitting is used to replace the duration bend to fix the dimension of the parameters matrix. The scheme takes reducing spectral distortion induced by the conversion of the dimension as the goal,and conducts different degree polynomial fitting with different duration range,and then the fitted matrix is quantized coded. The simulation results show that,the proposed solution has good quality of quantization.