VOICE RECOGNITION SYSTEM

• US 20100076751A1
• Filed: 10/14/2007
• Published: 03/25/2010
• Est. Priority Date: 12/15/2006
• Status: Active Grant

• Current Assignee: Mitsubishi Electric Corporation
• Original Assignee: Mitsubishi Electric Corporation
• Inventors: Chikuri, Takayoshi
• Granted Patent: US 8,195,461 B2
• Time in Patent Office: Days
• US Class Current: 704/10
• CPC Class Codes: G10L 15/183 using context dependencies, e.g. language models
• CPC Class Codes: G10L 15/22 Procedures used during a speech recognition process, e.g. man-machine dialogue

Abstract

A voice recognition system used for onboard equipment having a genre database (DB) that stores search target vocabularies in accordance with respective genres. It has a mike 1 for outputting speech sounds as spoken data; a first voice recognition dictionary 2a for recognizing words of search target genres in the genre DB; a second voice recognition dictionary 2b for recognizing words outside the search target genres; a voice recognition unit 3 for recognizing the speech sounds by collating the spoken data delivered from the mike with the vocabularies contained in the first and second voice recognition dictionaries; an interactive control unit 4 for outputting, when a word delivered from the voice recognition unit as a recognition result is a word obtained using the second voice recognition dictionary, a message so stating as presentation information; and a presentation unit 5 for presenting the presentation information to an outside.

Claims

1. A voice recognition system used for onboard equipment having a genre database that stores search target vocabularies in accordance with respective genres, the voice recognition system comprising:

a microphone for converting speech sounds to an electric signal, and for outputting the electric signal as spoken data;

a first voice recognition dictionary used for recognizing words of a search target genre in the genre database;

a second voice recognition dictionary used for recognizing words outside the search target genre in the genre database;

a voice recognition unit for recognizing the speech sounds by collating the spoken data delivered from the microphone with the words contained in the first voice recognition dictionary and in the second voice recognition dictionary;

an interactive control unit for outputting, when a word delivered from the voice recognition unit as a recognition result is a word obtained by collating with the words contained in the second voice recognition dictionary, a message stating that the word is not a word of the search target genre as presentation information; and

a presentation unit for presenting the presentation information delivered from the interactive control unit to an outside.

2. The voice recognition system according to claim 1, further comprising:

a name database that stores search target vocabularies under respective names; and

a retrieval unit for searching the name database using the word delivered from the interactive control unit as a retrieval key, and for sending a word which is obtained by the search and includes the retrieval key back to the interactive control unit, wherein

the interactive control unit instructs, when the word delivered from the voice recognition unit as a recognition result is a word obtained by collating with the words contained in the second voice recognition dictionary, the search by delivering the word to the retrieval unit, and outputs as the presentation information the word which includes the retrieval key and is sent back from the retrieval unit in response to the instruction.

3. The voice recognition system according to claim 1, further comprising:

a communication unit for executing a network search using the word delivered from the interactive control unit as a keyword, and for sending a word including the keyword obtained by the network search back to the interactive control unit, wherein

the interactive control unit instructs, when the word delivered from the voice recognition unit as a recognition result is a word obtained by collating with the words contained in the second voice recognition dictionary, the network search by delivering the word to the communication unit, and outputs as the presentation information the word which includes the keyword and is sent back from the retrieval unit in response to the instruction.

4. The voice recognition system according to claim 1, further comprising a dictionary update unit for preparing a new second voice recognition dictionary by replacing the existing second voice recognition dictionary by an update voice recognition dictionary obtained from an outside.

5. The voice recognition system according to claim 4, further comprising:

a recognition correcting component for instructing correction of the recognition result delivered from the voice recognition unit; and

a communication unit for transmitting the spoken data delivered from the microphone via the interactive control unit to a voice recognition server via a network in response to the instruction from the recognition correcting component, for receiving from the voice recognition server via the network the update voice recognition dictionary generated in a manner as to include a vocabulary used when the voice recognition server is able to recognize the spoken data, and for sending the update voice recognition dictionary back to the interactive control unit, wherein

the dictionary update unit acquires the update voice recognition dictionary from the interactive control unit, and prepares the new second voice recognition dictionary by replacing the existing second voice recognition dictionary by the update voice recognition dictionary acquired.