High quality thai text-to-phoneme converter

• US 20060259301A1
• Filed: 05/12/2005
• Published: 11/16/2006
• Est. Priority Date: 05/12/2005
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Guohong, Ding, Yang, Cao, Yuezhong, Tang, Feng, Ding, Xia, Wang
• Application Number:
  US11/127,707
• Publication Number:
  US 20060259301A1
• Time in Patent Office: Days
• US Class Current: 704/235
• CPC Class Codes: G10L 13/08 Text analysis or generation of parameters for speech synthesis out of text, e.g. grapheme to phoneme translation, prosody generation or stress or intonation determination
• CPC Class Codes: G10L 15/00 Speech recognition G10L17/00 takes precedence

Abstract

An improved, high-quality Thai text-to-phoneme converter. Syllabification is performed strictly according to the Thai pronunciation rules. Initial vowels, Thai syllable structures, special vowels, leading vowels, syllables with silent marks, unterminated vowels and terminated vowels are used to accurately implement the Thai syllabification. After syllabification, the most probable phonemes are obtained for all of the syllables using a rule-based approach in one embodiment of the invention.

Claims

1. A method of converting a word sequence into a corresponding phonetic transcription for the Thai language, comprising:

preprocessing the word sequence;

syllabifying obvious portions of the word sequence;

syllabifying the special vowel

syllabifying the special vowel

for any words that contain vowels but have not yet completed syllabification, appending final consonants to the words when necessary according to preset rules;

syllabifying the special vowel

syllabifying the special vowel

processing any words in the word sequence that have not yet completed syllabification; and

obtaining a final phoneme series by concatenating phonemes for all of the generated syllables.

2. The method of claim 1, wherein the special vowel is processed by treating all instances of in the word sequence as a normal vowel during syllabification.

3. The method of claim 1, wherein the special vowel is treated as an unterminated vowel during syllabification.

4. The method of claim 1, wherein the syllabification of any words in the word sequence that have not yet been terminated involves the use of a rule-based approach.

5. The method of claim 1, wherein the obtaining of a final phoneme series involves the use of a rule-based approach to convert each syllable to a corresponding phoneme.

6. The method of claim 1, wherein the special vowel is treated as a normal vowel during syllabification.

7. The method of claim 1, wherein the preprocessing includes listing in a table and processing all irregular syllables before syllabification.

8. The method of claim 1, wherein obvious syllabification includes:

designating all initial vowels in a word as the beginning of a syllable;

inverting all initial vowels if followed a single letter consonant;

inverting all initial vowels if followed by a double letter consonant and can be combined with another letter to form a new vowel; and

syllabifying all initial consonants that are followed by tone marks.

9. A computer program product for converting a word sequence into a corresponding phonetic transcription for the Thai language, comprising:

computer code for preprocessing the word sequence;

computer code for syllabifying obvious portions of the word sequence;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for, for any words that contain vowels but have not yet completed syllabification, appending final consonants to the words when necessary according to preset rules;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for processing any words in the word sequence that have not yet completed syllabification and

computer code for obtaining a final phoneme series by concatenating phonemes for all of the generated syllables.

10. The computer program product of claim 9, wherein the special vowel is processed by treating all instances of in the word sequence as a normal vowel.

11. The computer program product of claim 9, wherein the special vowel is treated as an unterminated vowel during syllabification.

12. The computer program product of claim 9, wherein the syllabification of any words in the word sequence that have not yet been terminated involves the use of a rule-based approach during syllabification.

13. The computer program product of claim 9, wherein the obtaining of a final phenomena series involves the use of a rule-based approach to convert each syllable to a corresponding phoneme.

14. The computer program product of claim 9, wherein the preprocessing includes listing in a table and processing all irregular syllables before syllabification.

15. The computer program product of claim 9, wherein obvious syllabification includes:

designating all initial vowels in a word as the beginning of a syllable;

inverting all initial vowels if followed by a single letter consonant;

inverting all initial vowels if followed by a double letter consonant and can be combined with another letter to form a new vowel; and

syllabifying all initial consonants that are followed by tone marks.

16. An electronic device, comprising:

a processor; and

a memory unit operatively connected to the processor and including a computer program product for converting a word sequence into a corresponding phonetic transcription for the Thai language, including;

computer code for preprocessing the word sequence;

computer code for syllabifying obvious portions of the word sequence;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for, for any words that contain vowels but have not yet completed syllabification, appending final consonants to the words when necessary according to preset rules;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for processing any words in the word sequence that have not yet completed syllabification; and

computer code for obtaining a final phoneme series by concatenating phonemes for all of the generated syllables.

17. The electronic device of claim 16, wherein the special vowel is treated as an unterminated vowel during syllabification.

18. The electronic device of claim 16, wherein the preprocessing includes listing in a table and processing all irregular syllables before syllabification.

19. The electronic device of claim 16, wherein obvious syllabification includes:

designating all initial vowels in a word as the beginning of a syllable;

inverting all initial vowels if followed a single letter consonant;

inverting all initial vowels if followed by a double letter consonant and can be combined with another letter to form a new vowel; and

syllabifying all initial consonants that are followed by tone marks.

20. A system for converting a word sequence into a corresponding phonetic transcription for the Thai language, comprising:

a processor; and

a memory unit operatively connected to the processor and including;

computer code for preprocessing the word sequence;

computer code for syllabifying obvious portions of the word sequence;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for, for any words that contain vowels but have not yet completed syllabification, appending final consonants to the words when necessary according to preset rules;

computer code for syllabifying the special vowel

computer code for syllabifying the special vowel

computer code for processing any words in the word sequence that have not yet completed syllabification; and

computer code for obtaining a final phoneme series by concatenating phonemes for all of the generated syllables.