Method for synthesizing pronunciation based on rhythm model and parameter selecting voice

A prosody and parameter technology, applied in the field of speech synthesis, can solve the problems of reducing naturalness of speech, not considering acoustic parameters, and mismatching sound length, etc., to achieve the effect of improving naturalness

Active Publication Date: 2006-06-14
BEIJING SINOVOICE TECH CO LTD
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Problems solved by technology

For example, if two consecutive syllables in a sentence are selected from the two sentences respectively, although the sound selection is carried out according to the position, the actual acoustic parameters may not be considered,

Method used

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  • Method for synthesizing pronunciation based on rhythm model and parameter selecting voice
  • Method for synthesizing pronunciation based on rhythm model and parameter selecting voice
  • Method for synthesizing pronunciation based on rhythm model and parameter selecting voice

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Embodiment Construction

[0022] Before the specific speech synthesis, first establish the following resource base:

[0023] Large-scale recording sound library: speech waveform data, the starting position of each syllable in the speech waveform and its acoustic parameter data (pitch, sound length, sound intensity).

[0024] Index library: For all syllables, the serial numbers of all samples in the large-scale recording sound library are recorded, and the relevant data of this syllable can be quickly obtained by searching the large-scale recording sound library from this serial number.

[0025] Prosodic model library: The prosody model obtained through statistical training, that is, what the pitch, sound length, and sound intensity of each syllable in a sentence should be like. The values ​​of these acoustic parameters are closely related to factors such as sentence pattern, part-of-speech sequence, and length of sentences and prosodic phrases.

[0026] Such as figure 1 The process of speech synthesi...

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Abstract

The invention provides a voice synthesizing method based on rhythm model and parameter-based sound selection, making acoustics rhythm parameter planning to obtain the target values of acoustics parameters expected by each syllable; then making maximum matching, selecting those with the smallest difference as really used samples; after the maximum matching, making single character matching treatment on the unmatched segments; calculating a synthesizing cost of all segment paths through all syllable candidate samples, where the synthesizing cost is determined by the difference between the acoustics parameters of each candidate sample and their planned values and the difference synthesis between the candidate samples of two adjacent syllables in the paths; obtaining a path with the lowest synthesizing cost by dynamical planning algorithm; as all syllable samples are selected, obtaining the data in a voice base and making waveform splicing and obtaining the final synthesis result.

Description

technical field [0001] The invention relates to the technical field of speech synthesis, in particular to a speech synthesis method. Background technique [0002] At present, the development direction of Chinese speech synthesis is based on the waveform splicing technology of large-scale real recording sound library. The so-called large-scale real recording sound library refers to the recording sound library that records a large number of natural speech, and its scope basically covers various pronunciation situations in most contexts. For different contexts, the system will select the most matching Original speech fragments to be spliced. Due to the large size of the sound library, in almost all cases, the most suitable original natural speech can be found without using other techniques for adjustment, thus ensuring the consistency of the final synthesized speech and the original speech. In addition, the fragments selected here go beyond the level of syllables, and can be ...

Claims

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Application Information

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IPC IPC(8): G10L13/00G10L13/10
Inventor 陈明吕士楠张连毅武卫东肖娜
Owner BEIJING SINOVOICE TECH CO LTD
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