query by humming造句
例句与造句
- based on such shortcomings in studies on query by humming, we did some work as followed : in the module of building a melody database, reduced the data that needed to be calculated by extracting the repeating patterns in the songs, and proposed an improved repeating-pattern-tree ( rp-tree ) algorithm, with much better performance; in the melody extraction module, firstly extracted the sequence of the pitches, then removed some wrong points and reduced the number of dimensions in sequence of pitches in some way after which a time series of pitches was generated; in the melody matching module, analyzed four familiar errors that occur to the humming and the requirement to the search algorithm, by which we designed a retrieval method of dynamic time warping ( dtw ) algorithm based on n-gram index; implemented a prototype system, and after doing the experiments, we got a top ten hit of 94 %
本文针对以上哼唱音乐检索研究中的不足,进行了如下工作:在建立旋律库模块,通过提取乐曲的重复模式来减少旋律匹配的计算量,提出了重复模式树(repeating-pattern-tree,rp-tree)算法的改进算法,大幅度提高了重复模式提取算法的性能;在连续哼唱输入的旋律提取模块,采用了先提取基频轨迹,再对基频轨迹进行去除错误点以及降维操作的方法,生成了音高时间序列;在旋律匹配模块,分析了哼唱输入可能具有的四种常见错误以及对检索算法的要求,设计了基于n-gram索引的动态时间弯折(dynamictimewarping,dtw)检索算法;最终实现了一个哼唱检索的原型系统,通过实验,达到了94%的前十名命中率。 - the current studies on query by humming focus on humming in special way and approximate string matching . little attentions are put on humming in continuous way, and even using the continuous input method, the matching is still based on the sequence of pitches which has not been processed first
目前对哼唱音乐检索的研究大多把重点放在特定哼唱输入方式和字符串之间的模糊匹配上,对于连续哼唱输入方式的研究较少,即使采用了连续哼唱输入方式,也是直接提取哼唱输入的基频轨迹进行匹配,缺少对基频轨迹预处理的研究。 - It's difficult to find query by humming in a sentence. 用query by humming造句挺难的