speechio/BigCiDian

Builds a unified IPA-based phoneset mapping both languages' phonological systems, enabling seamless pronunciation handling for code-switched speech (e.g., English brand names embedded in Mandarin). Derives English entries from CMUDict and Chinese from DaCiDian, preserving Chinese tonal information (0-4) while normalizing English to a toneless representation across 56 total phonemes. Integrates with Kaldi ASR frameworks and demonstrates modest WER improvements on AISHELL-2 Mandarin benchmarks while enabling true multilingual recognition capabilities.

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