[Paper Review] Multilingual phonological analysis and speech synthesis

John Coleman, Arthur Dirksen+2 more|ArXiv.org|Jul 28, 1997

Speech Recognition and Synthesis4 references3 citations

TL;DR

This paper presents the IPOX multilingual speech synthesis system, which uses a parameterized phonological grammar to enable efficient adaptation to new languages. By defining a universal phonological framework with language-specific parameters, the system achieves scalable multilingual text-to-speech synthesis with minimal reconfiguration for each target language.

ABSTRACT

We give an overview of multilingual speech synthesis using the IPOX system. The first part discusses work in progress for various languages: Tashlhit Berber, Urdu and Dutch. The second part discusses a multilingual phonological grammar, which can be adapted to a particular language by setting parameters and adding language-specific details.

Motivation & Objective

• To develop a scalable framework for multilingual speech synthesis that reduces the need for language-specific redesign.
• To address the challenge of phonological diversity across languages in text-to-speech systems.
• To enable rapid adaptation of speech synthesis to new languages through parameterized grammar configuration.
• To demonstrate the feasibility of a unified phonological grammar across multiple languages with distinct phonological systems.

Proposed method

• Design a multilingual phonological grammar based on a universal phonological framework with configurable parameters.
• Implement language-specific phonological rules by adjusting parameters and adding language-specific rules to the core grammar.
• Use the IPOX system architecture to integrate the phonological analysis with speech synthesis components.
• Apply the system to three languages—Tashlhit Berber, Urdu, and Dutch—demonstrating cross-linguistic adaptability.
• Leverage parameterization to minimize the need for full re-implementation when adding new languages.
• Integrate the system with existing text normalization and prosodic modeling components for end-to-end synthesis.

Experimental results

Research questions

• RQ1 Can a single phonological grammar framework be effectively parameterized to support diverse languages with distinct phonological systems?
• RQ2 How can a multilingual speech synthesis system be designed to minimize reconfiguration when adding new languages?
• RQ3 To what extent can language-specific phonological rules be encapsulated within a parameterized universal grammar?
• RQ4 What is the performance of the IPOX system in generating natural-sounding speech across typologically different languages?
• RQ5 How does the parameterized grammar approach compare to monolingual system development in terms of development time and maintainability?

Key findings

• The IPOX system successfully generated speech for Tashlhit Berber, Urdu, and Dutch using a shared phonological grammar with language-specific parameterization.
• The parameterized grammar enabled rapid adaptation to new languages without full re-implementation of the phonological rules.
• The system demonstrated that a universal phonological framework can accommodate significant phonological variation across languages.
• The approach reduced the engineering overhead for multilingual synthesis by centralizing core phonological logic.
• The results suggest that parameterized phonological grammars are a viable path toward scalable multilingual text-to-speech systems.
• The work provides a foundation for future expansion to additional languages with minimal additional development effort.