TTS evaluation: Double-ended objective quality measures

We address the problem of TTS speech quality evaluation and propose a double-ended objective measure in the form of average spectral distortion between time-aligned reference and synthesized speech, where the reference signal is made available as the speech of the text input to the TTS spoken by the same speaker as the unit-database. We detail the time-aligned spectral distortion measure calculated via dynamic time-warping and apply this measure...