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Voice conversion method based on adaptive Gaussian clustering under non-parallel text condition

A speech conversion, non-parallel technology, applied in speech analysis, speech recognition, instruments, etc., can solve the problem of weak personality information of the speaker

Active Publication Date: 2017-10-27
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

This method can make reasonable use of pre-stored speaker information, but usually the adaptive process will cause smoothing of the spectrum, resulting in weak speaker personality information in converted speech

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  • Voice conversion method based on adaptive Gaussian clustering under non-parallel text condition
  • Voice conversion method based on adaptive Gaussian clustering under non-parallel text condition
  • Voice conversion method based on adaptive Gaussian clustering under non-parallel text condition

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Embodiment Construction

[0072] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0073] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein Explanation.

[0074] The high-quality speech conversion method of the present invention is divided into two parts: the training part is used to obtain the parameters and conversion functions required for speech conversion, and the conversion part is used to realize the conversion of the source speaker's voice ...

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Abstract

The invention discloses a voice conversion method based on adaptive Gaussian clustering under a non-parallel text condition, and belongs to the technical field of voice signal processing. The method comprises the steps: firstly carrying out the voice feature parameter alignment of non-parallel linguistic data through a method based on the combination of unit selection and sound channel length normalization; secondly carrying out the training of an adaptive Gaussian mixed model and bilinear frequency bending and amplitude adjustment, and obtaining a conversion function needed by voice conversion; finally achieving the high-quality voice conversion through the conversion function. The method overcomes the limit that the training stage requires the parallel linguistic data, achieves the voice conversion under the non-parallel text condition, is higher in adaptability and universality, employs the adaptive Gaussian mixed model to replace a conventional Gaussian mixed model, solves a problem that a Gaussian mixed model is not precise in voice feature parameter classification, combines the adaptive Gaussian mixed model with the bilinear frequency bending and amplitude adjustment, and is better in conversion personality similarity and voice quality.

Description

technical field [0001] The invention relates to a voice conversion technology, in particular to a voice conversion method under the condition of non-parallel text, and belongs to the technical field of voice signal processing. Background technique [0002] Speech conversion is an emerging research branch in the field of speech signal processing in recent years. It is carried out and developed on the basis of speech analysis, recognition and synthesis. [0003] The goal of voice conversion is to change the voice personality of the source speaker so that it has the voice personality of the target speaker, that is, to make the voice spoken by one person sound like another person's voice after conversion, while preserving semantics . [0004] Most speech conversion methods, especially those based on GMM, require the corpus used for training to be parallel text, that is, the source speaker and the target speaker need to utter sentences with the same speech content and speech dur...

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Application Information

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IPC IPC(8): G10L15/02G10L15/06G10L15/07G10L15/14G10L17/02G10L21/007G10L25/51G10L19/032
CPCG10L15/02G10L15/063G10L15/07G10L15/14G10L17/02G10L19/032G10L21/007G10L25/51
Inventor 李燕萍左宇涛
Owner NANJING UNIV OF POSTS & TELECOMM
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