Voiceprint recognition method based on TDNN (time delay neural network)

A technology of voiceprint recognition and neural network, applied in speech analysis, instruments, etc., can solve the problems of a large amount of training data and increased computational complexity, and achieve good recognition effect, simple calculation, and strong feature extraction ability

Inactive Publication Date: 2019-08-13
NANJING SILICON INTELLIGENCE TECH CO LTD
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AI Technical Summary

Problems solved by technology

In both cases, if the DNN is trained on in-domain data, the improvement over the traditional i-vector acoustics is significant, but it requires a large amount of training data compared to the traditional i-vectors model, and the calculation The complexity is also greatly increased

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  • Voiceprint recognition method based on TDNN (time delay neural network)

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Embodiment Construction

[0020] The present disclosure will be described in further detail below in conjunction with the accompanying drawings.

[0021] Before performing voiceprint recognition, the voice must be collected first. This disclosure provides two data collection methods. One is to develop a mobile phone APP with local recording and timing functions. After recording, it is deployed to Alibaba Cloud, and the data is saved locally. Released version, the audio storage format is WAV, and the sampling rate is 16000Hz. The second is to develop telephone recording, using simple background scheduling, the client can call php through url to make a call, and at the same time support dialing 32 lines (involving port idle monitoring), support uninterrupted free recording, and save long audio to the local.

[0022] When collecting sound, you can formulate some test requirements and regulations, for example: 1. The environment is quiet, there is no sharp noise, no loud interference from others, and your ...

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Abstract

The invention discloses a voiceprint recognition method based on a TDNN (time delay neural network), and solves the problems that a voiceprint recognition algorithm is complicated and data are complex. The voiceprint recognition method is technically characterized by extremely strong feature extraction capacity of a neural network. The TDNN is used for extracting the feature vector of a voice segment of a speaker, a pooling layer and a softmax layer are used for acquiring the posterior probability of the voice segment of the speaker, a loss function is used for training to obtain a cross entropy, the softmax layer is removed after training, the feature vector for finally training a PLDA (probabilistic linear discriminant analysis) model is acquired, transcription of training data is omitted, and simple calculation and good recognition effects are achieved.

Description

technical field [0001] The present disclosure relates to a voiceprint recognition method, in particular to a voiceprint recognition method based on a time-delay neural network TDNN. Background technique [0002] The performance of deep neural network (DNN) embeddings for speech recognition is improved using data augmentation techniques. The DNN is trained to distinguish speakers by mapping variable-length utterances into fixed-dimensional embeddings, which we call x-vectors. Previous research has found that embeddings make better use of large-scale training datasets than i-vectors, however, collecting large amounts of labeled data for training is challenging. Data augmentation consisting of additive noise and reverberation is used as an inexpensive way to increase the amount of training data and improve robustness. Comparing x-vector and i-vector baselines for NIST SRE 2016 Cantonese speakers, we find that while augmentation is beneficial in the probabilistic linear discrim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L17/18G10L17/02G10L17/04
CPCG10L17/02G10L17/04G10L17/18
Inventor 司马华鹏唐翠翠
Owner NANJING SILICON INTELLIGENCE TECH CO LTD
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