面向移动终端的农业知识文语转换系统

Mobile Terminal-oriented Text to Speech System for Agriculture Knowledge

摘要:

设计了一套面向移动终端的农业知识文语转换系统，该系统借鉴语义检索技术中对于关键词的语义处理方式，用语义检索技术处理文本切分过程中所遇到的歧义字段，可将农业文本知识转换为自然流畅的语音，并结合呼叫中心技术、借助移动终端推广农业知识。首先对文语转换中的文本分析流程进行分析，明确歧义字段处理为文语转换的关键点。在明确关键点的基础上，设计出用于进行分词的词典，进而基于词典匹配和统计分析模型对歧义字段进行提取，再基于语义检索对歧义字段进行处理，从而实现歧义字段的切分，最终采用Cool Edit Pro 2.0软件实现语音合成和韵律处理功能，开发出面向移动终端的农业知识文语转换系统，可有效解决歧义字段的处理问题。由测试结果可以看出，本文算法的查准率为94.03％，较最大匹配法和三元语法的查准率分别提高了5.72个百分点和0.97个百分点；本文算法的查全率为95.32％，较最大匹配法和三元语法的查全率分别提高了0.23个百分点和1.95个百分点；本文算法的F-1测度为0.93，较最大匹配法提高了0.01，与三元语法相同，说明本文算法具有较好的性能。

关键词:农业知识 移动终端 文语转换 歧义字段

Abstract:

With the help of semantic processing of keyword in semantic retrieval technology, a mobile terminal-oriented text to speech system was designed for agriculture knowledge. The ambiguous phrase encountered in text segmentation were cutting by using semantic search technology which could converted agricultural text knowledge to smooth and natural voice, and popularized agricultural knowledge combining call center and mobile terminal technology. Firstly, the text analysis flow was analyzed, and the ambiguous phrase which was the key point of text to speech processing was confirmed. Based on this key point, the word segmentation dictionary was designed, and the ambiguous phrase was extracted based on the dictionary matching and statistical analysis. Secondly, the ambiguous phrase was processed based on semantic retrieval and the segmentation of ambiguous phrase was realized. Finally, the functions of speech synthesis and prosodic processing were realized with the software of Cool Edit Pro 2.0, and mobile terminal-oriented text to speech system was developed for agriculture knowledge which could effectively solve the problem of ambiguous phrase processing.

Key words:Agriculture knowledge Mobile terminal Text to speech Ambiguous phrase