计算机应用
計算機應用
계산궤응용
COMPUTER APPLICATION
2010年
1期
230-232
,共3页
直方图交集法%特征距离%过零率
直方圖交集法%特徵距離%過零率
직방도교집법%특정거리%과령솔
histogram intersection%feature distance%Zero Crossing Rate (ZCR)
在固定音频检索的整体检索方法中,当检索目标较长时,检索时间会变得很长.为了减小检索时间,提出了一种基于随机段的音频检索方法.把整个检索过程分成随机段检索和整体匹配两个阶段:随机段检索是从参考模板中随机选择一段(随机段)作为检索目标进行检索;整体匹配是在随机段检索出的基础上,判断潜在目标信号是否为参考模板.把这种随机检索的方法应用到计算特征距离和直方图交集方法中,结果证明该检索方法的准确率可以达到90%以上,而且平均检索时间可以降低到随机段与参考模板的比值和整体检索时间的积.
在固定音頻檢索的整體檢索方法中,噹檢索目標較長時,檢索時間會變得很長.為瞭減小檢索時間,提齣瞭一種基于隨機段的音頻檢索方法.把整箇檢索過程分成隨機段檢索和整體匹配兩箇階段:隨機段檢索是從參攷模闆中隨機選擇一段(隨機段)作為檢索目標進行檢索;整體匹配是在隨機段檢索齣的基礎上,判斷潛在目標信號是否為參攷模闆.把這種隨機檢索的方法應用到計算特徵距離和直方圖交集方法中,結果證明該檢索方法的準確率可以達到90%以上,而且平均檢索時間可以降低到隨機段與參攷模闆的比值和整體檢索時間的積.
재고정음빈검색적정체검색방법중,당검색목표교장시,검색시간회변득흔장.위료감소검색시간,제출료일충기우수궤단적음빈검색방법.파정개검색과정분성수궤단검색화정체필배량개계단:수궤단검색시종삼고모판중수궤선택일단(수궤단)작위검색목표진행검색;정체필배시재수궤단검색출적기출상,판단잠재목표신호시부위삼고모판.파저충수궤검색적방법응용도계산특정거리화직방도교집방법중,결과증명해검색방법적준학솔가이체도90%이상,이차평균검색시간가이강저도수궤단여삼고모판적비치화정체검색시간적적.
This paper proposed a specific audio retrieval method based on random segment in order to decrease the retrieval time for relatively long object in the total retrieval of audio retrieval. The whole retrieval process was composed of random segment retrieval and total matching: the first was to select a segment from template model as object to retrieve in stored signal and the second was to judge whether the potential object signal was the template model based on random segment. Then using this method in computing feature distance directly and histogram intersection retrieval,the experimental results show retrieval accuracy over 90% and average retrieval time declined to the ratio of random segment to template model multiplying total retrieval time.
