Development of a bi-directional speech conversion system for speech communication of the hearing impaired

摘要摘要如下所示。基于Cepstral分析/合成的语音翻译方法是指对感官神经听受影响的光谱级压缩、对老年人听受影响的语音的速度转换和音调转换。因此，在个人电脑和I/O板上构建评估系统的原因。在系统中，一个主题可以选择任何处理和控制这些参数，在个人电脑显示器上查看菜单。最佳参数设置.确定音调转换之间的关系是很重要的，因为这是在这种再合成语音中确定音调转换之间的关系，包括声音音调转换。因此，我们在使用评估系统的实验中调查了这些关系。建议的音高周期控制方法：言语质量可能会在更高的音高转换中降级。因此，我们提出了一种基于再采样和全通滤波器的新的音高控制方法。在整个研究中，我们无法确定双方向通信系统。However，提出的语音翻译方法也可以应用于恢复被一个听不到的人所接受的降级的语音。在未来，我们将尝试调查这样的恢复格式和构建通信系统。

Brief summary is as follows.・Speech translation method based on the Cepstral analysis/synthesisThis method consists on a spectral level compression for the sensori-neural hearing impaired, a speed conversion of speech for the elder hearing impaired, and a pitch conversion. Therefore,・Construction of the evaluation system which consists on a PC and an I/O board.In the system, a subject can select any processing and control those parameters viewing the menu on the PC display.・Optimal parameters setting.It is important to define the relationship between the pitch conversion coefficients and the compression/expansion rate on the spectral frequency in such re-synthetic speech including voice pitch conversion. So, we investigated those relations in the experiments using the evaluation system.・Proposal of the pitch period control method.Degradations of speech qualities may occur in the higher pitch conversion. So, we proposed a new pitch control method based on the re-sampling and the all-pass filters.In the whole study, we could not realize the bi-directional communication system. However, the proposed speech translation method can be applied to recover the degraded speech uttered by a hearing impaired person also. In future, we will try to investigate such recovering formulations and construct the communication system.