| 摘要 |
A method and an apparatus for enhancing the perceptual quality of synthesized speech signals is disclosed. According to the present invention, the time-varying synthesis filter comprises one or several filter section(s) of fractional order, i.e. filter sections having a non-integer order. Traditionally, synthesis filters employed for synthesis of parametric speech data have been of integer order, and often been constituted by a composition of paralleled or cascaded second order filter sections. The speech synthesis filter may in the latter situation be composed of a set of cascaded or parallel second order filters or filer sections as disclosed in WO 00/72305. |
