Text-to-Speech Tests for SEPIA Open Assistant Framework

Mozilla TTS

Mozilla TTS (Tacotron2) - 27.06.2020 - Reference

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 4.14 s

Real-time factor: 2.77

Mozilla TTS (Tacotron2) - TensorFlow Lite - 15.07.2020 - Reference

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 2.36 s

Real-time factor: 1.47

Classic "Old School" References

eSpeak

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 0.08 s

Real-time factor: 0.062

pico

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 0.13 s

Real-time factor: 0.07

Mary-TTS - Voice: dfki-spike-hsmm en_GB

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 0.33 s

Real-time factor: 0.19

Mary-TTS - Voice: cmu-slt-hsmm en_US

Test system: Raspberry Pi4 4GB

Sentence: "Hello this is a test"

Run-time: 0.70 s

Real-time factor: 0.54