1. Institut de Technologie du Cambodge (ITC)
Génie Informatique et Communication (GIC)
TTS (Text-To-Speech)
Seangmeng LONG
[seangmeng@itc.edu.kh]
BarCamp

2. What is TTS?
 TTS stands for Text-To-Speech
 It is a system (module) which takes as input text
in Khmer Unicode and produces Khmer speech
Input Output
Electronic documents TTS system Khmer Speech
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3. Our Method
 Concatenation-Based Synthesis using Diphone
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4. Our Method (steps)
 Word Segmentation: ស ស ស ស ស ស
ស ស ស ស ស ស→ សស ស សស
ស ស សស ស ,
ស ស
ស ស ស
ស ស សស សស សស ស
 Text Normalization: →ស ស ស ស ស ស ,ស ស
ស ស ស ស ស ស ស
ស ស ស
ស ស ស
 Text To Sound Conversion: ស ស
ស ស→ kakthen
 Syllabification: sa:la: → sa: . la:
 Stress Assignment: sa: . la: → sə . la:
 Sound Change: ស ស
ស សcak → caʔ
 Intonation
 Diphone Database
 Integration
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 Applications Development (mail reader, doc reader, ...)

5. New Statistical System
 Speech corpus
~450 sentences (~30 minutes)
Automatic labeling
 EHMM labeler
 Sphinx
 Statistical parameter synthesis
More natural, but buzzy
 Unit selection
Units of variable size (smallest unit is phone)
More natural, but bad quality at join points
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6. Thanks for your attention.
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