Encoding method for syllables

• US 5,208,863 A
• Filed: 11/02/1990
• Issued: 05/04/1993
• Est. Priority Date: 11/07/1989
• Status: Expired due to Fees

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Sakurai, Atsushi, Tamura, Junichi, Kosaka, Tetsuo
• Primary Examiner(s): KEMENY, EMANUEL
• Application Number:
  US07/608,376
• Time in Patent Office: 914 Days
• Field of Search: 381/51, 381/43, 381/41
• US Class Current: 704/243
• CPC Class Codes: G10L 15/02 Feature extraction for speech recognition; Selection of recognition unit

Abstract

A method for encoding syllables of a language, particularly the Japanese language, and for facilitating the extraction of sound codes from the input syllables, for voice recognition or voice synthesis includes the step of providing a syllable classifying table, in which each syllable is represented by an upper byte code indicating the consonant part of the syllable and a lower byte code indicating the non-consonant part of the syllable. The consonants constitute a first category of data classified by phonetic features, while the non-consonants constitute a second category of data classified by phonetic features, so that the extraction of consonant or non-consonant sounds can be made by a search in only the first or the second categories. The encoding of diphthongs are made in such a manner that those containing the same vowel have the same remainder corresponding to the code of this vowel, when the codes are divided by the number of vowels contained in the second category, so that the extraction of a vowel from diphthongs can be achieved by a simple mathematical division.

Claims

1. A method of generating code information having first and second parts representing a syllable, said method comprising the steps of:

providing a first set of phonemes each of which is only part of a syllable;

providing a second set of phonemes each of which can be a syllable in combination with a consonant;

forming a table comprising a first category of data representing the first set of phonemes provided in said first providing step and a second category of data representing the second set of phonemes provided in said second providing step;

generating a first part of the code information using the first category of data; and

generating a second part of the code information using the second category of data.

2. A method according to claim 1, wherein said forming step comprises the step of classifying and encoding phonemes belonging to the first category according to phonetic features.

3. A method according to claim 1, wherein said forming step comprises the step of classifying and encoding phonemes belonging to the second category according to phonetic features.

4. A method according to claim 1, wherein said forming step comprises the step of encoding, in the second category, the phonemes such that codes of the phonemes containing the same vowel part have the same remainder when divided by a certain integer.

5. A method according to claim 3, wherein said forming step comprises the step of encoding, in the second category, the phonemes such that codes of the phonemes containing the same vowel part have the same remainder when divided by a certain integer.

6. A method according to claim 4, wherein said certain integer is the number of vowels contained in the second category of data.

7. A method according to claim 5, wherein said certain integer is the number of vowels contained in the second category of data.