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This paper presents fast zero-resource spoken term detection (STD) in a large-scale data set, by using a hierarchical graph-based similarity search method (HGSS). HGSS is an improved graph-based similarity search method (GSS) in terms of a search space for high-speed performance. Instead of a degree-reduced k-nearest neighbor (k-DR) graph for GSS, a hierarchical k-DR graph, which is constructed based...
This paper presents a neighborhood graph index approach for query-by-example search using dynamic time warping (DTW) on Gaussian mixture model (GMM) posteriorgram sequences. The approach is intended to achieve a significant speed-up of a spoken term detection (STD) task for resource-limited situations. The proposed method employs a degree-reduced k-nearest neighbor (k-DR) graph as an index. A set...
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