提出了基于多维单位球面和逻辑的前馈神经元网络学习算法,并成功应用于移动机器人路径规划和生油岩评价专家系统,该项研究工作获林家翘应用数学二等奖。近年来,对基于段模型的大词表汉语连续语音识别的声学建模、快速解码算法、语言模型、韵律模型等;汉语语音合成的基于语料库拼接方法、基于HMM的参数合成、时长建模等;语音增强的基于多统计分布噪声估计和声学机理的滤波器设计等,以及计算听觉场景分析的基于统计的多基音估计和基于听觉机理的组织策略等进行了深入研究,取得多项重要科研成果。目前专利正在申请中。结合科研任务,指导培养了数十名博士、硕士研究生。主要完成的国家自然科学基金、863高技术发展计划等如下:
1、“基于段特征分布及听觉机理的抗噪音语音识别方法”, 国家自然科学基金项目(编号:60172055);
2、“听觉计算模型及其在说话人识别中的应用,”(与北京大学合作)自然科学基金重点项目(编号:69635020);
3、“马尔柯夫类模型中NP问题的实用快速算法研究”九五“863”项目(编号:863-306-ZT06-01-03);
4、 “语音导航的GIS/GPS集成系统研究及其在PDA上的实现”, 北京市自然科学基金项目(编号:4002012);
5、“汉语通用语音库和数据转换算法的建立”,中科院知识创新工程领域前沿项目(编号:1M02J05);
6、“限定文本说话人确认技术研究及其在金融领域中的应用,”(与北京大学合作), 十五“863”项目(编号:2001AA114181);
7、“声音个性化汉语语音合成方法关键技术研究,”北京市自然科学基金项目(编号:4042025)。
发表学术论文逾百篇,近年发表的部分论文:
1、刘文举,孙兵,钟秋海,“基于说话人分类技术的分级说话人识别研究,”电子学报,第33卷,第7期,pp1230~1233,2005年。
2、Yun Tang, Wenju Liu, Yiyan Zhang, Bo Xu, “A Framework for Fast Segment Model by Avoidance of Redundant Computation on Segment,” International Journal of Computational Linguistics and Chinese Language Processing, Vol. 11(1), pp73~86, Mar., 2006.
3、Yun Tang, Wen-Ju Liu, Hua Zhang, Bo Xu, Guo-Hong Ding, “One-pass Coarse-to-Fine Segmental Speech Decoding Algorithm,” Proceedings of ICASSP(International Conference on Acoustics, Speech, and Signal Processing, ) Vol.Ⅰ, pp441~444, May 14-19, 2006,Toulouse, France.
4、Kang Heng, and Liu Wenju, “Selective-LPC based Representation of STRAIGHT Spectrum and Its Applications in Spectral Smoothing,” Proc. of INTERSPEECH 2006-ICSLP(9th International Conference on Spoken Language Processing), pp2050~2053, September 17-21, 2006, Pittsburgh, Pennsylvania, USA.
5、Peng Li, Yong Guan, Wenju Liu and Bo Xu, “Monaural Speech Separation Based on Computational Auditory Scene Analysis and Objective Quality Assessment of Speech,” IEEE Transaction on Audio, Speech, and Language Processing,Vol.14, Num.6, pp2014~2023,November, 2006.
6、Wenju Liu, Yun Tang, and Shouye Peng, “Fast and Robust Stochastic Segment Model for Mandarin Digital String Recognition,” Proceedings of 2008 IEEE Congress on Computational Intelligence(WCCI 2008),pp.1446~1450, June 1-6,2008, Hong Kong, China.
7、Ning Cheng, Wen-Ju Liu, Peng Li, and Bo Xu, “An Effective Microphone Array Post-filter in Arbitrary Environments,” Proceedings of 9th Annual Conference of the International Speech Communication Association (Interspeech 2008), pp.439~442, 22-26 September 2008, Brisbane, Australia.
8、Wenju Liu, Yun Tang, and Shouye Peng, “Research on Segment Acoustic Model Based Mandarin LVCSR,” Proceedings of 6th International Symposium on Neural Networks, pp.928~935, ISNN 2009 Wuhan, China, May 26-29, 2009.
9、Xueliang Zhang, Wenju Liu, Peng Li, and Bo Xu,“MONAURAL VOICED SPEECH SEGREGATION BASED ON ELABORATE HARMONIC GROUPING STRATEGY,”Proceedings of ICASSP’2009(IEEE International Conference on Acoustics, Speech, and Signal Processing), pp.4661~4664, April 19~24, 2009, Taipei International Convention Center, Taipei, Taiwan.
10、 Peng Li, Yong Guan, Shijin Wang, Bo Xu and Wenju Liu, “Monaural Speech Separation Based on MAXVQ and CASA for Robust Speech Recognition,” Computer Speech and Language 24 (2010) pp. 30~44.
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