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Method and device for establishing language model and method and device for recognizing voice

A language model and model technology, applied in speech recognition, speech analysis, instruments, etc., can solve problems such as the reduction of recognition rate, and achieve the effect of accurate recognition and reliable retrieval results

Active Publication Date: 2012-08-01
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for establishing a language model, a method for speech recognition and its device, so as to solve the problem that the language model cannot change with the user's retrieval behavior in the existing speech recognition, which leads to a decrease in the recognition rate. question

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  • Method and device for establishing language model and method and device for recognizing voice

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Please refer to figure 1 , figure 1 It is a schematic flowchart of an embodiment of a method for establishing a language model in the present invention. Such as figure 1 As shown, the method includes:

[0031] Step S101: Obtain time-sensitive search corpus.

[0032] Step S102: Use the acquired time-sensitive search corpus to perform language model training to obtain a time-sensitive language model.

[0033] Step S103: merging the time-sensitive language model with the background language model to obtain a final recognition language model.

[0034] The above steps are described in detail below.

[0035] In step S101, the time-sensitive search corpus refers to the search corpus that can reflect the user's retrieval behavior within a rec...

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Abstract

The invention provides a method and a device for establishing a language model and a method and a device for recognizing voice. The method for establishing the language model comprises the following steps of: acquiring timeliness search corpora; carrying out language model training by utilizing the acquired timeliness search corpora to obtain a timeliness language model; and fusing the timeliness language model with a background language model to obtain the final recognition language model, wherein the background language model is used for describing a long-term retrieval behaviour of a user. Through adopting the recognition language model obtained by the method provided by the invention, when the user sends a voice retrieval request for an emergency, the request of the user can be accurately recognized, so that a reliable retrieval result can be provided for the user.

Description

【Technical field】 [0001] The invention relates to natural language processing technology, in particular to a method for establishing a language model, a method for speech recognition and a device thereof. 【Background technique】 [0002] With the development of search engine technology and mobile communication technology, it has become very common to use voice search to obtain information. Voice search does not require people to send a search request through text input, so that people can easily obtain relevant information while exercising, which brings great convenience to people's lives. [0003] In voice search, the user's voice needs to be recognized first. Only by accurately recognizing the user's voice expression into consistent semantic text can accurate retrieval results be returned to the user. The result of speech recognition depends on the language model used in speech recognition. In the existing speech recognition system in speech search, once the language model...

Claims

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Application Information

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IPC IPC(8): G10L15/06G10L15/08
Inventor 万广鲁
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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