Method and apparatus of speech template selection for speech recognition

• US 20060149545A1
• Filed: 12/05/2005
• Published: 07/06/2006
• Est. Priority Date: 12/31/2004
• Status: Abandoned Application

• Current Assignee: Delta Electronics Incorporated
• Original Assignee: Delta Electronics Incorporated
• Inventors: Liao, Wen-wei, Huang, Liang-sheng, Shen, Jia-lin
• Application Number:
  US11/294,011
• Publication Number:
  US 20060149545A1
• Time in Patent Office: Days
• US Class Current: 704/236
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue
• CPC Class Codes: G10L 2015/0631 Creating reference templates; Clustering
• CPC Class Codes: G10L 2015/228 of application context

Abstract

A speech input apparatus having a speech input from a user and the method therefor are provided. The speech input apparatus includes a speech template unit providing a plurality of speech templates, an I/O interface outputting and switching the plurality of speech templates to the user to be selected in response to the speech, a speech recognition unit recognizing the speech to provide a result; a database unit storing data; and a search unit searching the database unit for specific data in response to the result.

Claims

1. A speech input apparatus having a speech input from a user, comprising:

a speech template unit providing a plurality of speech templates;

an I/O interface communicating the said users for the selection among said plurality of speech templates;

a speech recognition unit recognizing said speech to provide a result;

a database unit storing data; and

a search unit searching said database unit for specific data in response to said result.

2. The speech input apparatus according to claim 1, wherein said I/O interface is a monitor.

3. The speech input apparatus according to claim 1, wherein said I/O interface is a loudspeaker.

4. The speech input apparatus according to claim 1, wherein said I/O interface is a browsing button.

5. The speech input apparatus according to claim 1, wherein said speech recognition unit further comprises:

an input device inputting said speech;

an extracting device extracting feature coefficients from said speech;

a constraint-model unit comprising lexicon models and language models for providing a first recognition reference;

an acoustic model providing a second recognition reference; and

a speech recognition engine recognizing said speech according to said feature coefficients, said first recognition reference, and said second recognition reference.

6. The speech input apparatus according to claim 1, wherein when a specific speech template is selected by said user, the specific lexicon model and language model in response to said specific speech template are activated by

said template unit for said speech recognition engine.

7. A speech input method comprising steps of:

(a) providing a plurality of speech templates;

(b) switching said plurality of speech templates;

(c) selecting one of said plurality of speech templates as a selected speech template;

(d) activating one model corresponding to said selected speech template;

(e) inputting a speech;

(f) recognizing said speech according to said model, and generating a result;

(g) providing said result to a search unit; and

(h) searching for a specific data in a database unit in response to said result.

8. The speech input method according to claim 7, wherein said step (f) comprises steps of:

(f1) extracting feature coefficients from said speech; and

(f2) recognizing said speech according to said feature coefficients and said model.

9. The method according to claim 8, wherein said step (f1) comprises steps of:

(f11) pre-processing said speech; and

(f12) extracting feature coefficients from said speech.

10. The method according to claim 9, wherein said step (f11) further comprises steps of:

amplifying said speech;

normalizing said speech;

pre-emphasizing said speech;

multiplying said speech by a Hamming Window;

and filtering said speech.

11. The method according to claim 9, wherein said step (f12) further comprises steps of:

performing a Fast Fourier Transform for said speech;

and determining a Mel-Frequency Cepstrum Coefficient for said speech.

12. A method for dynamically updating the constraint-model unit that includes lexicon models and language models for a speech input apparatus, wherein said speech input apparatus comprises a database unit and said constraint-model unit, and said database unit contains some content, comprising steps of:

(a) converting said content into a lexicon model and a language model for recognition;

(b) updating the indices to said content for database search;

(c) storing said lexicon model and said language model to said constraint-model unit; and

(d) storing said indices in said database unit.