Fitting Translated Speech Back Into the Original Timeline: The Duration Problem in AI Dubbing

Automated excerpt

Speech rate then modulates this: Spanish and Japanese speakers produce around 7.8 syllables per second, English about 6.2, German about 6.0. Stretch every segment to its original slot. German needs 20 to 40 percent on a bad line, so the naive fix produces unusable German while looking fine on Japanese test clips.

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