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Instrumental Quality Estimation for Synthesized Speech Signals

合成语音信号的仪器质量估计

基本信息

批准号：
162351856
负责人：
Professor Dr.-Ing. Ulrich Heute
金额：
--
依托单位：
Arbeitsgruppe Digitale Signalverarbeitung und Systemtheorie
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/162351856?language=en
关键词：
Instrumental Quality Estimation Synthesized Speech

项目摘要

The project planned for three years in the initial proposal [Möller, Heute, 2009], granted up to now for two years aims at an instrumental measure for the auditory quality of text-to-speech (TTS) synthesis systems. Thereby, expensive auditive measurements (listening tests) shall not be replaced completely; they can, however, be avoided widely during a system development or pre-selection of potential system candidates. The goal is a measure which estimates the quality from the TTS-synthesis signal only, without any reference signal. It is based on attributes i.e., it compiles the total impression, like a listener, from different single aspects. So, the perceptual quality space is spanned by a certain number of dimensions. For the dimensions, instrumental measurements are to be found, from which, finally, an integral quality measure is to be constructed. Beyond, however, and different from a direct integral quality estimation, detailed diagnostic information is available, valuable for the system developer.In the initial proposal [Möller, Heute, 2009] the following questions were raised: Which aspects are relevant for the perception and quality judgment of synthetic speech at various applications? Which of these aspects are reflected in the speech signal? How can the single quality aspects be estimated instrumentally? How can the total quality be estimated from the synthesized speech signal alone? How can the estimated values be represented in a quality profile for different applications? For which synthesis methods and applications does such a profile hold?After the first two years, partial answers have been found. For the continued investigations, the following questions are added: How does the measured quality depend on the TTS speakers voice? How can supra-segmental quality aspects be taken into account? How do relevant features depend on time in the sense of time-variance on one hand, in the sense of a reasonable estimation reliability on the other hand? Which features are useful for the quality analysis of short TTS signals, which ones for longer sequences? While the compilation of the integral quality from single aspects as well as the validity question were already planned mainly for the third year in the initial proposal [Möller, Heute, 2009], the extension towards an inclusion of voice quality and time dependence resulted newly from the present investigations. As well, the central importance of a supra-segmental quality measurement is a novel point of view, now to be taken into account.

该项目在最初的提案中计划为期三年 [Möller, Heute, 2009]，目前已获批两年，旨在对文本转语音 (TTS) 合成系统的听觉质量进行工具性测量。因此，昂贵的听觉测量（听力测试）不应被完全取代；然而，在系统开发或预选潜在系统候选过程中，可以广泛避免它们。目标是仅根据 TTS 合成信号估计质量，无需任何参考信号。它基于属性，即它像听众一样从不同的单一方面汇总总体印象。因此，感知质量空间跨越一定数量的维度。对于尺寸，需要找到仪器测量结果，最后根据测量结果构建完整的质量测量。然而，除了直接积分质量估计之外，还提供了详细的诊断信息，这对系统开发人员很有价值。在最初的提案中 [Möller, Heute, 2009] 提出了以下问题：哪些方面与各种应用中合成语音的感知和质量判断相关？语音信号反映了哪些方面？如何通过仪器评估单一质量方面？如何仅根据合成的语音信号来估计总体质量？如何在不同应用的质量概况中表示估计值？这样的概况适用于哪些合成方法和应用？经过头两年，已经找到了部分答案。为了继续调查，添加了以下问题：测量的质量如何取决于 TTS 扬声器的声音？如何考虑超细分质量方面？一方面在时间方差的意义上，另一方面在合理的估计可靠性的意义上，相关特征如何依赖于时间？哪些功能对于短 TTS 信号的质量分析有用，哪些功能对于较长序列有用？虽然在最初的提案[Möller, Heute, 2009]中已经计划主要在第三年对单个方面的整体质量以及有效性问题进行汇编，但目前的调查新产生了纳入语音质量和时间依赖性的扩展。同样，超细分质量衡量的核心重要性是一个新颖的观点，现在需要考虑。