Multi-Dimensional Prosody Judgment For Live Streaming Speech Synthesis
Researchers introduce Live-ProsodyJudge and D-LPJ, Gemini-distilled Qwen3-Omni judges that decouple multi-dimensional prosody scores for live streaming TTS evaluation.
Researchers introduce Live-ProsodyJudge (LPJ), a pairwise TTS prosody evaluator distilled from Gemini into Qwen3-Omni for cost-effective live streaming speech synthesis evaluation. They identify verdict coupling, where multi-dimensional judges collapse dimension scores into a single preference bit, and propose Decoupled-Live-ProsodyJudge (D-LPJ) using masked SFT and a span-local GRPO strategy. Balanced-order LPJ beats a single Gemini call in point accuracy, and in a Best-of-8 TTS selection tournament the chosen utterance falls in the human top-3 for 85.29% of high-confidence cases.