Four of the Most Common Synthetic Speech Problems

1. FOUR OF THE MOST COMMON SYNTHETIC SPEECH PROBLEMS A N D H O W T O S O L V E T H E M PRONUNCIATION ERRORS Speech-to-speech (STS) systems almost entirely avoid this kind of pronunciation error, and if it does happen, it is generally the fault of the source speaker, not of the system. The other type of pronunciation mistake has to do with pronouncing a sound unclearly or substituting one sound for another. PROSODY ISSUES Speech-to-speech voice conversion has a natural advantage in prosody over TTS because it excels at duplicating the source speaker's prosody (and the source speaker, hopefully, does understand the text). Respeecher's technology produces far more natural sounding prosody than TTS systems. It offers an infinite prosodic palette for content creators. VOCODING AND AUDIO QUALITY ISSUES This makes intuitive sense since a high-quality waveform needs to be sampled about 44,000 times per second, but the physical parameters of sound change only about 100 times per second, and the control signal that the human brain supplies to create speech has an even lower timing precision, especially if we consider how often we tend to change the sound we are producing. SPEAKER IDENTITY ISSUES At Respeecher, we are continually working to gain more control over the aspects of speech that are possible to transfer and convert. This helps not only with mimicking speech identity but accent as well.