Method and device for detecting speech keywords as well as retrieval method and system thereof

A keyword and voice technology, which is applied in the field of voice keyword detection, can solve the problems of increased calculation, difficulty in determining the threshold, and large calculation, and achieve the effect of reducing the calculation and reducing the burden

Inactive Publication Date: 2009-12-02
SHARP KK
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Problems solved by technology

However, due to the large amount of calculation for vector calculation, and the threshold for feature merging is difficult to determine, and the setting of this threshold directly affects whether the obtained feature vecto

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  • Method and device for detecting speech keywords as well as retrieval method and system thereof
  • Method and device for detecting speech keywords as well as retrieval method and system thereof
  • Method and device for detecting speech keywords as well as retrieval method and system thereof

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Embodiment Construction

[0033]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. For clarity and conciseness, detailed descriptions of known functions and constructions incorporated herein will be omitted to prevent them from obscuring the subject matter of the present invention.

[0034] figure 1 A schematic functional block diagram of a speech keyword retrieval system according to an embodiment of the present invention is shown. Such as figure 1 As shown, the speech keyword retrieval system according to the embodiment of the present invention includes an audio file input device 200 , a keyword input device 300 , a speech keyword detection device 100 and a detection result output device 400 .

[0035] The user inputs one or more voice files using the audio file input device 200 , and inputs keywords in text form or voice form using the keyword input device 300 . The speech keyword detection part 100 is used to detec...

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PUM

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Abstract

The invention discloses a method and a device for detecting speech keywords as well as a corresponding retrieval method and a system thereof. The system for detecting the speech keywords comprises a VQ code library, a state characteristic library, a state sequence generating unit and a matching unit, wherein the VQ code library stores VQ codes based on a preset acoustical model; the state characteristic library stores a VQ state sequence matrix of an audio file, and the VQ state sequence matrix comprises VQ code numbers and corresponding acoustical probability values of various audio frames of the audio file; the state sequence generating unit is based on the VQ codes in the VQ code library and converts an input keyword into a corresponding VQ state sequence; and the matching unit utilizes the converted VQ state sequence to reduce the VQ state sequence matrix in the state characteristic library and utilizes the VQ state sequence to search the speech keyword in the reduced VQ state sequence matrix. The invention technology can be utilized to rapidly search the speech keywords in the audio file and rapidly find the audio file containing the speech keyword in an audio file library.

Description

technical field [0001] The invention relates to the detection of speech keywords, in particular to a method and device for detecting speech keywords and a corresponding retrieval method and system, which can quickly detect speech keywords from audio files. Background technique [0002] In recent years, more and more information terminal devices, such as PCs (Personal Computers), PDAs (Personal Digital Assistants), mobile phones, and remote controls, have voice input functions, allowing users to input commands or input Key words. That is to say, it is necessary for such an information terminal device to be able to recognize the keyword that the user wants to input from the unknown voice string input by the user, or to detect the keyword input by the user from the existing voice file, for example, in an audio retrieval system Applications. Therefore, how to accurately and quickly detect keywords in speech files is an important issue in speech recognition technology. [0003...

Claims

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Application Information

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IPC IPC(8): G10L15/08G06F17/30
Inventor 杨庆涛缪炜吴亚栋李丰芹
Owner SHARP KK
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