Method, Device And System for Implementing Speech Recognition Function

• US 20080228483A1
• Filed: 04/18/2008
• Published: 09/18/2008
• Est. Priority Date: 10/21/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Chen, Cheng
• Granted Patent: US 8,417,521 B2
• Time in Patent Office: Days
• US Class Current: 704/251
• CPC Class Codes: G10L 15/19 Grammatical context, e.g. disambiguation of the recognition hypotheses based on word sequence rules
• CPC Class Codes: G10L 15/30 Distributed recognition, e.g. in client-server systems, for mobile phones or network applications
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04L 65/762 at the source reformatting of additional data in video distribution servers H04N21/2355

Abstract

The present disclosure discloses a method, a device and a system for implementing a speech recognition function, in which a media resource control device controls a media resource processing device to recognize a speech input by a user via H.248 protocol. The method includes receiving, by the media resource processing device, an H.248 message carrying a speech recognition instruction and a related parameter sent by the media resource control device; performing speech recognition according to the speech recognition instruction and the parameter; and reporting a recognition result to the media resource control device. A corresponding device and system for implementing the speech recognition function is further provided.

Claims

1. A method for recognizing a speech, comprising:

receiving, by a media resource processing device, an H.248 message carrying a speech recognition instruction and a related parameter sent by a media resource control device;

performing, by the media resource processing device, speech recognition according to the speech recognition instruction and the related parameter; and

reporting a recognition result to the media resource control device.

2. The method according to claim 1, wherein the related parameter comprises a recognition grammar parameter for the speech.

3. The method according to claim 2, further comprising performing, by the media resource processing device, the speech recognition according to the recognition grammar parameter, when the recognition grammar parameter is a recognition grammar for a common speech.

4. The method according to claim 3, further comprising extracting, by the media resource processing device, a text string and performing the speech recognition after receiving the recognition grammar parameter;

wherein a specific character string is embedded into the recognition grammar parameter.

5. The method according to claim 3, wherein when the recognition grammar for the speech is prestored on the media resource processing device or an external server, the recognition grammar parameter is an ID and storage location information of a recognition grammar file, and the media resource processing device reads and caches the recognition grammar file according to the storage location information and performs the speech recognition according to the recognition grammar file which is read.

6. The method according to claim 1, wherein the related parameter comprises a parameter used during the speech recognition.

7. The method according to claim 6, further comprising performing the speech recognition according to the parameter used during the speech recognition which comprises a parameter adapted to instruct whether to recognize a common speech only.

8. The method according to claim 6, further comprising determining a time length of the speech recognition according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the time length of the speech recognition.

9. The method according to claim 6, further comprising determining a waiting time for a user to input according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the waiting time.

10. The method according to claim 6, further comprising determining a type of the language employed during the common speech recognition according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the type of a language to be recognized.

11. The method according to claim 6, further comprising determining a recognition accuracy required during the common speech recognition according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the recognition accuracy.

12. The method according to claim 6, further comprising determining a recognition sensitivity required during the common speech recognition according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the recognition sensitivity.

13. The method according to claim 6, further comprising recording and storing the user input during the speech recognition in a designated location according to the parameter used during the speech recognition which comprises a parameter adapted to indicate the storage location of the record.

14. The method according to claim 6, wherein the parameter used during the speech recognition further comprises:

a parameter adapted to indicate whether to prefetch a grammar file, and if the parameter which is adapted to indicate whether to prefetch a grammar file set as Yes, the media resource processing device reads the grammar file from an external server and cache the grammar file locally when the recognition grammar is stored in a mode of a file; and

/or

a parameter adapted to indicate a cache time for the grammar file and set the cache time for the grammar file read from an external server, and if a duration of a cache exceeds the cache time which has been set, the cache is invalid.

15. The method according to claim 1, during the speech recognition performed by the media resource processing device, further comprising:

detecting, by the media resource processing device, an abnormal event comprising the waiting time for a user to input timing out, a recognition timeout, a mismatch between a user input and grammar, the grammar file not existing, the grammar file being read error, a user input being unable to be recognized, a recognition error, and a software/hardware error of the media resource processing device; and

/or

detecting, by the media resource processing device, an event of inputting a speech by a user and reporting a speech type of a detected speech input by the user to the media resource control device, the speech comprising;

a dual tone multi-frequency, DTMF, and a common speech.

16. The method according to claim 15, further comprising detecting, by the media resource processing device, a speech recognition process according to an instruction of the media resource control device, and feeding back a detection result to the media resource control device.

17. The method according to claim 16, further comprising feeding back, by the media resource processing device, a corresponding error code to the media resource control device when detecting the abnormal event during the speech recognition.

18. A media resource processing device, comprising:

an instruction obtaining unit, adapted to obtain a related control parameter and a recognition grammar;

a speech obtaining unit, adapted to obtain a speech signal to be recognized which is input by a user and send the speech signal to a speech recognition unit;

the speech recognition unit, adapted to convert an input speech signal into a machine-recognizable character string according to the recognition grammar and the related control parameter; and

a sending unit, adapted to send a processing result of the speech recognition unit to a media resource control device.

19. The device according to claim 18, further comprising:

a file obtaining unit, adapted to obtain a grammar file prestored externally and send the grammar file to the speech recognition unit, wherein the speech recognition unit extracts the recognition grammar from the grammar file received and processes the speech signal.

20. A system for implementing a speech recognition function, comprising:

a media resource control device, wherein the media resource control device is adapted to communicate with a media resource processing device;

wherein the media resource control device is adapted to send an H.248 message carrying a speech recognition instruction and a related parameter to a media resource processing device, and control the media resource processing device to perform a speech recognition; and

wherein the media resource processing device is adapted to receive the H.248 message carrying the speech recognition instruction and the related parameter from the media resource control device, perform the speech recognition according to the related parameter, and feed back a speech recognition result to the media resource control device.