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《Acta Electronica Sinica》 2002-11
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The Efficient Method for Producing Audio Data Index

LI Ying,HOU Yi bing(Computer and Information Technology Institute,Xi′an Jiaotong University,Xi′an,Shaanxi 710049,China)  
To support the retrieval by example,audio multimedis database ought to be capable of automatically analyzing audio data for producing the index of the audio data.We combined the index method based on discrete wavelet transform with the method based on time frequency analysis in this paper.And a method was proposed that utilize the wavelet subband,a certainly proportional high frequency coefficient of the wavelet subband and all the approximately coefficient etc.to form the index vector.The proposed method introduced double index search,that is using zero cross vector and average magnitude vector at first pre search and then using key coefficient of the wavelet transform as index to make more detailed search.The experiment shows that this method has a high retrieval precision and search efficiency,and has importance sense in the audio multimedis database based on example index and search.
【Fund】: 福建省 2 1 1工程计算机与信息工程重点学科项目
【CateGory Index】: TP311.13
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