Audio Indexing and Retrieval of Complete Broadcoast News Shows
Audio Indexing and Retrieval of Complete Broadcoast News Shows
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完整广播新闻节目的音频索引和检索
DOI：
10.5555/2856151.2856171
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发表时间：
2000
期刊：
影响因子：
--
通讯作者：
P. Woodland
中科院分区：
文献类型：
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作者：
Sue E. Johnson;P. Jourlin;Karen Spärck Jones;P. Woodland
本文描述了一种仅从音频数据开始检索完整广播新闻节目的相关部分的系统。描述并展示了一种自动检测和删除广告的新颖系统，该系统提高了系统的性能，同时还减少了所需的计算工作量。还描述了产生高质量转录的复杂的大词汇量语音识别器和具有后合并功能的基于窗口的检索系统。
结果是使用 1999 年 TREC-8 口语文档检索数据针对未知故事边界的任务给出的。描述了调查系统各个方面有效性的实验，并显示了自动消除广告、在检索期间强制广播结构、使用相关性反馈、改变检索参数以及在后处理期间合并的相对好处。当重复被评分为不相关时，使用该系统可以实现 46.5% 的平均精度。
This paper describes a system for retrieving relevant portions of complete broadcast news shows starting with only the audio data. A novel system of automatically detecting and removing commercials is described and shown to increase the performance of the system whilst also reducing the computational effort required. The sophisticated large vocabulary speech recogniser which produces the high-quality transcriptions and the window-based retrieval system with post-merging are also described.
Results are presented using the 1999 TREC-8 Spoken Document Retrieval data for the task where no story boundaries are known. Experiments investigating the effectiveness of all aspects of the system are described and the relative benefits of automatically eliminating commercials, enforcing broadcast structure during retrieval, using relevance feedback, changing retrieval parameters and merging during post-processing are shown. An Average Precision of 46.5%, when duplicates are scored as irrelevant is shown to be achievable using this system.