CAJ | 학술논문

新闻发布会中，首要说话人（例如政府要员）通常要即兴回答记者事先准备好的问题。因而首要说话人语速一般很慢，而其他说话人（例如记者、翻译等）语速则相对较快。基于两者的语速差异，采用一个滑动窗从连续语音流中截取语音段，再估计各音段语速得到一条语速曲线，然后寻找语速曲线中的局部最小值进而得到两类说话人的改变点，最后将语速低于门限且在两相邻改变点之间的语音段判为首要说话人语音，从而实现首要说话人检测。实验结果表明，与传统方法相比，基于语速差异的方法获得了更好的性能。
신문발포회중，수요설화인（례여정부요원）통상요즉흥회답기자사선준비호적문제。인이수요설화인어속일반흔만，이기타설화인（례여기자、번역등）어속칙상대교쾌。기우량자적어속차이，채용일개활동창종련속어음류중절취어음단，재고계각음단어속득도일조어속곡선，연후심조어속곡선중적국부최소치진이득도량류설화인적개변점，최후장어속저우문한차재량상린개변점지간적어음단판위수요설화인어음，종이실현수요설화인검측。실험결과표명，여전통방법상비，기우어속차이적방법획득료경호적성능。
Chief speakers(e.g.politicians)generally impromptu answer prepared journalists in press conferences. Therefore, the speaking rate of chief speakers is slow while that of other speakers(e.g.journalists, interpreters)is quick. Based on the difference of speaking rate between the two kinds of speakers, a sliding window is used to extract voice from continuous audio stream, so that speaking rates of each window are estimated to obtain a rate curve where local minima can be found to determine change points. Finally, speech segments who satisfy speaking rates lower than a rate threshold and between two adjacent change points are distinguished as chief speakers’voice. The experimental results show that the proposed method gets better performance in comparison with traditional methods.