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TLST

Thank you for your time !

In this test, the goal is to evaluate the perceptual quality between recordings of speech and their time-scaled reconstruction by several algorithms and for several time-scale factors.

You will listen several artificially time-scaled speech waveforms. The time scale factor varies from 0.5 to 6. The criteria of quality include artifact-free waveforms, such as chorusing, buzziness, whispering, metallic/robotic voice, etc.

At first, you will play the original sound as many times as you want (labeled Original). Then, you will play the other sounds as many times as you want again, and select which one time-scaled speech signal has the highest quality. The original signal is given as a reference.

Recommendations

• If there is any technical problem with one sound, select Prob.
• Absolutely use headphones. Do not use earphones or speakers.
• Verify that the sound is loud enough to hear the details properly.
• Do the test in a quiet place.
• Take the time to listen !
• Please, do not stop the sound before it finishes!
• Please, do not play audio files simultaneously !
• Before answering the test, do not hesitate to ask me any question.