Speech input search system

• US 20040254795A1
• Filed: 08/05/2004
• Published: 12/16/2004
• Est. Priority Date: 07/23/2001
• Status: Abandoned Application

• Current Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan), Japan Science And Technology Agency
• Original Assignee: National Institute of Advanced Industrial Science and Technology (Government of Japan), Japan Science And Technology Agency
• Inventors: Fujii, Atsushi, Ishikawa, Tetsuya, Akiba, Tomoyoshi, Itoh, Katsunobu
• Application Number:
  US10/484,386
• Publication Number:
  US 20040254795A1
• Time in Patent Office: Days
• US Class Current: 704/277
• CPC Class Codes: G06F 16/24522 Translation of natural language queries to structured queries
• CPC Class Codes: G06F 16/3344 using natural language analysis
• CPC Class Codes: G06F 16/3346 using probabilistic model
• CPC Class Codes: G10L 15/18 using natural language modelling
• CPC Class Codes: G10L 15/19 Grammatical context, e.g. disambiguation of the recognition hypotheses based on word sequence rules
• CPC Class Codes: G10L 15/26 Speech to text systems G10L15/08 takes precedence

Abstract

A language model 114 for speech recognition is developed from a text database 122 through offline modeling 130 (solid line arrow). A transcript is generated online by executing a speech recognition processing 110 using an acoustic model 112 and a language model 114 when a user utters a retrieval request. Next, a text retrieval processing 120 is executed using the transcribed retrieval request, and then outputs the retrieval results in order from the most relevant. Information is then acquired from the top-ranked texts of the retrieval results and is subjected to modeling 130, the speech recognition language model is refined (dotted line arrow), and speech recognition and text retrieval are then carried out again. This allows improvement in accuracy of recognition and retrieval compared to the initial retrieval.

Claims

1. (Canceled)

2. A speech input retrieval system, which retrieves in response to a query input by speech, comprising:

a speech recognition means, which performs speech recognition of the query input by speech using an acoustic model and a language model that is generated from a retrieval target database;

a retrieval means, which searches a database in response to the query to which speech recognition has been performed;

a retrieval result display means, which displays the retrieval results; and

a language model generation means, which regenerates the language model with retrieval results from the retrieval means,

wherein

the speech recognition means re-performs speech recognition in response to the query using the regenerated language model, and

the retrieval means conducts a retrieval once again using the query to which speech recognition has been re-performed.

3. The speech input retrieval system of claim 2, wherein,

the retrieval means calculates the matching degree with the query and outputs in order from the highest matching degree, and

the language model generation means uses already established retrieval results with high matching degree when regenerating the language model with the retrieval results from the retrieval means.

4. A recording medium that is recorded with a computer program, which allows integration of the speech input retrieval system of claim 2 in a computer system.

5. A computer program, which allows integration of the speech input retrieval system of claim 2 in a computer system

6. A recording medium that is recorded with a computer program, which allows integration of the speech input retrieval system of claim 3 in a computer system.

7. A computer program, which allows integration of the speech input retrieval system of claim 3 in a computer system.