Abstract
Spoken term detection (STD) provides an efficient means for content based indexing of speech. However, achieving high detection performance, faster speed, detecting ot-of-vocabulary (OOV) words and performing STD on low resource languages are some of the major research challenges. The paper provides a comprehensive survey of the important approaches in the area of STD and their addressing of the challenges mentioned above. The review provides a classification of these approaches, highlights their advantages and limitations and discusses their context of usage. It also performs an analysis of the various approaches in terms of detection accuracy, storage requirements and execution time. The paper summarizes various tools and speech corpora used in the different approaches. Finally it concludes with future research directions in this area.
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