Journal of Systems Engineering and Electronics ›› 2021, Vol. 32 ›› Issue (5): 1097-1110.doi: 10.23919/JSEE.2021.000094

• ELECTRONICS TECHNOLOGY • Previous Articles     Next Articles

Learning a discriminative high-fidelity dictionary for single channel source separation

Yuanrong TIAN1,*(), Xing WANG2()   

  1. 1 School of Electronic Countermeasure, National University of Defense Technology, Hefei 230037, China
    2 Institute of Aeronautics Engineering, Air Force Engineering University, Xi’an 710038, China
  • Received:2020-07-22 Online:2021-10-18 Published:2021-11-04
  • Contact: Yuanrong TIAN E-mail:tianyuanrong20@nudt.edu.cn;xwang_mail@yeah.net
  • About author:|TIAN Yuanrong was born in 1989. He received his B.S. degree in electronics and information engineering from China University of Geosciences in 2011, and M.S. and Ph. D. degrees in communication and information system from Air Force Engineering University in 2014 and 2019 respectively. Currently, he is a lecturer in National University of Defense Technology. His primary research is on pattern analysis of geometric or statistical models in high-dimensional data space and applications in signal interception and analysis, image targets detection and mixing audio separation. E-mail: tianyuanrong20@nudt.edu.cn||WANG Xing was born in 1965. He received his B.S. and M.S. degrees in communication and electronical system from the former Air Force Engineering College, China, in 1987 and 1990. His Ph. D. degree is obtained in signal and information processing from Northwestern Polytechnical University in 2001. From 1996 to 1999, he was a visiting scholar at Zhukovsky Air Force Engineering College, Moscow, Russia. He served as the director of the Airborne Electronic Countermeasures Laboratory, Air Force Enginering University (AFEU), from 2001 to 2012. He is currently a professor in the Radar and Electronic Countermeasure Department, AFEU. His research interests mainly include radar signal interception and jamming, statistics model analysis, artificial intelligence based on machine learning, circuit design and integration. E-mail: xwang_mail@yeah.net
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (62001489) and the scientific research planning project of National University of Defense Technology (JS19-04)

Abstract:

Sparse-representation-based single-channel source separation, which aims to recover each source’s signal using its corresponding sub-dictionary, has attracted many scholars’ attention. The basic premise of this model is that each sub-dictionary possesses discriminative information about its corresponding source, and this information can be used to recover almost every sample from that source. However, in a more general sense, the samples from a source are composed not only of discriminative information but also common information shared with other sources. This paper proposes learning a discriminative high-fidelity dictionary to improve the separation performance. The innovations are threefold. Firstly, an extra sub-dictionary was combined into a conventional union dictionary to ensure that the source-specific sub-dictionaries can capture only the purely discriminative information for their corresponding sources because the common information is collected in the additional sub-dictionary. Secondly, a task-driven learning algorithm is designed to optimize the new union dictionary and a set of weights that indicate how much of the common information should be allocated to each source. Thirdly, a source separation scheme based on the learned dictionary is presented. Experimental results on a human speech dataset yield evidence that our algorithm can achieve better separation performance than either state-of-the-art or traditional algorithms.

Key words: single channel source separation, sparse representation, dictionary learning, discrimination, high-fidelity