Development of Speech Synthesizing Device with individuality Features by LSP parameter

在利用LSP参数开发具有个性化特征的语音合成器的研究中，我们着重研究了以下三个问题。(1)为高质量语音合成提供了一种新的声源构造方法。(2)提出了一种有效的方法，将音素成分所对应的参数如LSP进行适当的连接，以产生连续的语音信号。(3)提出了一种基于LSP参数分析与合成的男女语音转换方法，当要求合成语音具有个性化特征时，就必须生成高质量的语音源。低质量的语音源会导致合成语音的恶化。为了获得理想的声源，对第一个课题进行了深入的研究。本文提出了一种声源生成方法，该方法对合成清晰的辅音特别有效。第二个课题是开发语音合成中连接存储在设备中的音素成分的方法。如果我们能够正确地连接音素参数分量，我们就可以合成出高质量的语音。我们提出了一个非常有效的方法，利用神经网络。在第三个课题中，我们提出了一种在不降低语音个体特征的前提下控制语音音高的语音合成方法。此外，我们还提出了一种控制语音特性的方法。

In our research on development of speech synthesizing device awarded with individuality features by using LSP parameters, we placed focus on the following three subjects. (1) a new approach of constructing voice source for speech synthesis of high quality. (2) effective methods for connecting properly the parameters, such as LSP, corresponding to phonemic components in order to generate continuous speech signal. (3) voice conversion method between male and female using LSP parameters analysis and synthesis.When we are required to provide the individuality features to the synthesized voice, it is essential to generate good quality voice source. Inferior quality voice source causes the deterioration in the synthesized voice. Thefirst subject above was studied elaborately in order to obtain desirable voice source. We proposed a method to generate voice source shich is particularly effective to synthesize the clear consonant voices. The second subject was done to develop the method in speech synthesis to connect the phonemic components which are stored in the device. If we can connect the phonemic parameter components properly, we can synthesize good quality voices. We proposed a very effective method by using neural network. In the third subject above, we proposed a speech synthesis method to control pitch of voice which does no cause the degradation of individuality features. Furthermore, we porposed a method to control the voice properties.