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Feature space determining method and device

A feature space and space technology, applied in the computer field, can solve the problem that the feature space is not accurate enough, affects the accuracy of classification and recognition results, etc.

Pending Publication Date: 2021-01-05
TENCENT MUSIC ENTERTAINMENT TECH SHENZHEN CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The feature space obtained by related technologies is not accurate enough, which affects the accuracy of classification and recognition results

Method used

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  • Feature space determining method and device
  • Feature space determining method and device
  • Feature space determining method and device

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Embodiment Construction

[0047] In order to make the purpose, technical solution and advantages of the present disclosure clearer, the implementation manners of the present disclosure will be further described in detail below in conjunction with the accompanying drawings.

[0048]In the embodiment of the present disclosure, the method for determining the feature space can be applied to various classification and recognition tasks. For example, speech emotion recognition task, image classification recognition task, etc. In the embodiment of the present disclosure, taking the speech emotion recognition task as an example, various features are used, and the features may include fundamental frequency, formant, Mel cepstral coefficient, zero-crossing rate, amplitude, and feature on the sentence. Statistical characteristics (for example, mean, variance, maximum value, minimum value, etc.), etc., in this way, the features used for speech emotion recognition tasks have many dimensions, which will lead to the ...

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Abstract

The invention provides a feature space determining method and device, and belongs to the technical field of computers. The method comprises the steps of acquiring characteristics of multiple trainingsamples in different dimensions, wherein the multiple training samples comprise multiple groups of different types of training samples; determining an inter-class distance and an intra-class distancecorresponding to each dimension of features according to the features of the plurality of training samples in different dimensions, and dividing the features in different dimensions into a first typeof feature set and a second type of feature set according to the inter-class distance and the intra-class distance corresponding to each dimension of features, wherein the contribution of the featuresin the first type of feature set to the determined category is higher than the contribution of the features in the second type of feature set, and determining a target feature space after dimension reduction of the features of different dimensions according to the first type of feature set and the second type of feature set. By adopting the method and the device, the accurate feature space can beobtained.

Description

technical field [0001] The present disclosure relates to the field of computer technology, in particular to a method and device for determining a feature space. Background technique [0002] With the development of computer technology, more and more classification and recognition tasks will use multi-dimensional features, for example, in speech emotion recognition tasks, fundamental frequency features, formant features, Mel cepstral coefficient features, zero-crossing rate features etc. When the feature dimension used is too large, some redundant features may be introduced, which will reduce the performance of classification recognition and increase the complexity of calculation. Therefore, it is necessary to provide a method to reduce the dimension of features. By reducing the dimension of features, the performance of classification recognition can be improved. , and reduce the computational complexity. [0003] In related technologies, when reducing the dimensionality of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62
CPCG06F18/213G06F18/2413G06F18/214
Inventor 陈颖
Owner TENCENT MUSIC ENTERTAINMENT TECH SHENZHEN CO LTD