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IndexTTS 2.5 advances zero-shot TTS with multilingual support and faster inference

By PulseAugur Editorial · [2 sources] ·

Researchers have introduced IndexTTS 2.5, an advanced zero-shot text-to-speech model that significantly improves upon its predecessor. Key enhancements include a reduced semantic codec frame rate for lower costs, an upgraded Zipformer-based architecture for faster inference, and expanded multilingual support for Chinese, English, Japanese, Spanish, and Arabic. The model also incorporates reinforcement learning to boost pronunciation accuracy and naturalness, enabling robust emotion transfer across languages even without specific emotional training data. AI

IMPACT Enhances multilingual TTS capabilities and inference speed, potentially accelerating adoption in global voice synthesis applications.

RANK_REASON The cluster describes a technical report detailing a new version of a text-to-speech model with specific technical improvements and expanded language support.

Read on Hugging Face Trending Models →

AI-generated summary · Google Gemini · from 2 sources. How we write summaries →

IndexTTS 2.5 advances zero-shot TTS with multilingual support and faster inference

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The cluster describes a technical report detailing a new version of a text-to-speech model with specific technical improvements and expanded language support.
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COVERAGE [2]

  1. arXiv cs.AI TIER_1 English(EN) · Yunpei Li, Xun Zhou, Jinchao Wang, Lu Wang, Yong Wu, Siyi Zhou, Yiquan Zhou, Yining Wang, Yaogen Yang, Zhetao Hu, Shiyao Duan, Jiacheng Xu, Bin Xia, Jingchen Shu ·

    IndexTTS 2.5 Technical Report

    arXiv:2601.03888v4 Announce Type: replace-cross Abstract: In prior work, we introduced IndexTTS 2, a zero-shot neural text-to-speech foundation model comprising two core components: a transformer-based Text-to-Semantic (T2S) module and a non-autoregressive Semantic-to-Mel (S2M) m…

  2. Hugging Face Trending Models TIER_1 English(EN) · IndexTeam ·

    IndexTeam/IndexTTS-2.5

    text-to-speech · 702 downloads · 70 likes

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