ContextCodec uses a dual-branch encoder with CLIP-style contrastive training on phoneme-aligned context features plus autoregressive refinement to improve quality-intelligibility at bitrates down to 500 bps.
Experimental setup Datasets and preprocessing.ContextCodec is trained on the training sets of LibriTTS [31] and AISHELL-3 [32]
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ContextCodec: Content-Focused Context Guidance for Ultra-Low Bitrate Speech Coding
ContextCodec uses a dual-branch encoder with CLIP-style contrastive training on phoneme-aligned context features plus autoregressive refinement to improve quality-intelligibility at bitrates down to 500 bps.