Back to results
US 8,719,006 B2Granted
Combined statistical and rule-based part-of-speech tagging for text-to-speech synthesis
AssigneeApple Inc.
InventorJerome R. Bellegarda
Life of this patent
Estimating the term…
Abstract
In response to a word of a text sequence, a first part-of-speech (POS) tag is generated using a statistical part-of-speech (POS) tagger based on a corpus of trained text sequences, each representing a likely POS of a word for a given text sequence. A second POS tag is generated using a rule-based POS tagger based on a set of one or more rules associated with a type of an application associated with the text sequence. A final POS tag is assigned to the word of the text sequence for TTS synthesis based on the first POS tag and the second POS tag.
Claims17
A computer-implemented method for text-to-speech (TTS) synthesis, comprising:
- in response to a word of a text sequence, generating a first part-of-speech POS tag using a statistical POS tagger based on a corpus of trained text sequences, each representing a likely POS of a word for a given text sequence, wherein the first POS tag is selected from a first POS tag set;
- generating a second POS tag using a rule-based POS tagger based on a set of one or more rules associated with a type of an application associated with the text sequence, wherein the second POS tag is selected from a second POS tag set that is different from the first POS tag set;
- calculating a first confidence score for the second POS tag based on a statistic data of applying a rule associated with the second POS tag, wherein the first confidence score is calculated based on a percentage of successful applications of the rule in previous TTS synthesis;
- designating the second POS tag as the final POS tag if the first confidence score is greater than or equal to a first predetermined threshold;
- designating the first POS tag as the final POS tag if the first confidence score is less than the first predetermined threshold;
- assigning a final POS tag to the word of the text sequence for TTS synthesis based on the first POS tag and the second POS tag;
- adjusting the first confidence score for the rule for future TTS synthesis based on whether the second POS tag has been selected as the final POS tag;
- and
- removing the rule from the set of one or more rules if the first confidence score is below a second predetermined threshold.
6 more elements
A non-transitory machine-readable storage medium having instructions stored therein, which when executed by a machine, cause the machine to perform a method for text-to-speech (TTS) synthesis, the method comprising:
- in response to a word of a text sequence, generating a first part-of-speech (POS) tag using a statistical POS tagger based on a corpus of trained text sequences, each representing a likely POS of a word for a given text sequence, wherein the first POS tag is selected from a first POS tag set;
- generating a second POS tag using a rule-based POS tagger based on a set of one or more rules associated with a type of an application associated with the text sequence, wherein the second POS tag is selected from a second POS tag set that is different from the first POS tag set;
- calculating a first confidence score for the second POS tag based on a statistic data of applying a rule associated with the second POS tag, wherein the first confidence score is calculated based on a percentage or successful applications of the rule in previous TTS synthesis;
- designating the second POS tag as the final POS tag if the first confidence score is greater than or equal to a first predetermined threshold;
- designating the first POS tag as the final POS tag if the first confidence score is less than the first predetermined threshold;
- assigning a final POS tag to the word of the text sequence for TTS synthesis based on the first POS tag and the second POS tag;
- adjusting the first confidence score for the rule for future TTS synthesis based on whether the second POS tag has been selected as the final POS tag;
- and
- removing the rule from the set of one or more rules if the first confidence score is below a second predetermined threshold.
6 more elements
A computer-implemented method for text-to-speech (TTS) synthesis, the method comprising:
- in response to a word of a text sequence, generating a first part-of-speech (POS) tag using a statistical POS tagger based on a corpus of trained text sequences, each representing a likely POS of a word for a given text sequence, wherein the first POS tag is selected from a first POS tag set;
- generating a second POS tag using a rule-based POS tagger based on a set of one or more rules associated with a type of an application associated with the text sequence, wherein the second POS tag is selected from a second POS tag set that is different from the first POS tag set;
- converting the second POS tag to a corresponding tag in the first POS tag set;
- and
- assigning a final POS tag to the word of the text sequence for TTS synthesis based on the first POS tag and the second POS tag.
2 more elements
A computer-implemented method for text-to-speech (TTS) synthesis, the method comprising:
- in response to a word of a text sequence, generating a first part-of-speech (POS) tag using a statistical POS tagger based on a corpus of trained text sequences, each representing a likely POS of a word for a given text sequence, wherein the first POS tag is selected from a first POS tag set;
- generating a second POS tag using a rule-based POS tagger based on a set of one or more rules associated with a type of an application associated with the text sequence, wherein the second POS tag is selected from a second POS tag set that is different from the first POS tag set;
- converting the first POS tag to a corresponding tag in the second POS tag set;
- and
- assigning a final POS tag to the word of the text sequence for TTS synthesis based on the first POS tag and the second POS tag.
2 more elements
A computer-implemented method for text-to-speech (TTS) synthesis, the method comprising:
- in response to a word of a text sequence, generating a first part-of-speech (POS) tag using a statistical POS tagger;
- generating a second POS tag using a rule-based POS tagger;
- calculating a confidence score for the second POS tag based on a statistic data of applying a rule associated with the second POS tag,
- assigning a final POS tag to the word of the text sequence for TTS synthesis, including:
- assigning the second POS tag as the final POS tag if the confidence score is greater than or equal to a first predetermined threshold;
- and
- assigning the first POS tag as the final POS tag if the confidence score is less than the first predetermined threshold;
- adjusting the confidence score for the rule for future TTS synthesis based on whether the second POS tag has been selected as the final POS tag;
- and
- removing the rule from the set of one or more rules if the confidence score is below a second predetermined threshold.
7 more elements
A system, comprising:
- one or more processors;
- and
- memory having instructions stored thereon, the instructions, when executed by the one or more processors, cause the processors to perform operations comprising:
- in response to a word of a text sequence, generating a first part-of-speech (POS) tag using a statistical POS tagger;
- generating a second POS tag using a rule-based POS tagger;
- calculating a confidence score for the second POS tag based on a statistic data of applying a rule associated with the second POS tag;
- assigning a final POS tag to the word of the text sequence for TTS synthesis, including:
- assigning the second POS tag as the final POS tag if the confidence score is greater than or equal to a first predetermined threshold;
- and
- assigning the first POS tag as the final POS tag if the confidence score is less than the first predetermined threshold;
- adjusting the confidence score for the rule for future TTS synthesis based on whether the second POS tag has been selected as the final POS tag;
- and
- removing the rule from the set of one or more rules if the confidence score is below a second predetermined threshold.
10 more elements
Dependencies are inferred from the claim text.