A pitch detector for application in query by humming(QBH)is implemented in this paper.This algorithm is made up of two parts:note segmentation and pitch detection.In the first part,voiced/silence decision is made on e...A pitch detector for application in query by humming(QBH)is implemented in this paper.This algorithm is made up of two parts:note segmentation and pitch detection.In the first part,voiced/silence decision is made on each segment of the input signal by a pattern recognition approach,and further,the preparatory note borders are obtained;then,via analysis of the instantaneous energy contour,the adjacent notes that adhere to each other are separated.In the second part,pitch is estimated for all frames contained in a note's duration by an autocorrelation method and the mean of these pitch values is taken as the average pitch of this note.Moreover,in order to remove the effect of formant structure,a nonlinear preprocessing is adopted in the pitch detection part and the autocorrelation function is properly weighted before peak picking.Finally,hummings of several experimenters with different voice characters are recorded to test this pitch detector,whose efficiency and reliability are proved by the results.展开更多
When you think of Dongguan,chances are you picture humming factories and endless assembly lines.For decades,this city in southern China was known as the“world's workshop,”churning out everything from sneakers to...When you think of Dongguan,chances are you picture humming factories and endless assembly lines.For decades,this city in southern China was known as the“world's workshop,”churning out everything from sneakers to smartphones.展开更多
Food Science and Human Wellness(FSHW ISSN:2213-4530,CN 10-1750/TS)publishes original research papers demonstrating the latest advancement of multidisci-plinary subjects related to food science and human health.Topics ...Food Science and Human Wellness(FSHW ISSN:2213-4530,CN 10-1750/TS)publishes original research papers demonstrating the latest advancement of multidisci-plinary subjects related to food science and human health.Topics may include but not limited to:nutriology,bio-chemistry,microbiology,immunology and toxicology.Papers regarding components of food especially nutrients and non-nutrient bioactive compounds(with putative health benefits)are welcomed.FSHW aims to unveil the correlations between food science and human health through the dissemination of both fundamental and applied research outcomes worldwide.展开更多
基金Supported by the National Natural Science Foun—dation of China(50099620)the 863 High Technology Project of China(2001AA132050)
文摘A pitch detector for application in query by humming(QBH)is implemented in this paper.This algorithm is made up of two parts:note segmentation and pitch detection.In the first part,voiced/silence decision is made on each segment of the input signal by a pattern recognition approach,and further,the preparatory note borders are obtained;then,via analysis of the instantaneous energy contour,the adjacent notes that adhere to each other are separated.In the second part,pitch is estimated for all frames contained in a note's duration by an autocorrelation method and the mean of these pitch values is taken as the average pitch of this note.Moreover,in order to remove the effect of formant structure,a nonlinear preprocessing is adopted in the pitch detection part and the autocorrelation function is properly weighted before peak picking.Finally,hummings of several experimenters with different voice characters are recorded to test this pitch detector,whose efficiency and reliability are proved by the results.
文摘When you think of Dongguan,chances are you picture humming factories and endless assembly lines.For decades,this city in southern China was known as the“world's workshop,”churning out everything from sneakers to smartphones.
文摘Food Science and Human Wellness(FSHW ISSN:2213-4530,CN 10-1750/TS)publishes original research papers demonstrating the latest advancement of multidisci-plinary subjects related to food science and human health.Topics may include but not limited to:nutriology,bio-chemistry,microbiology,immunology and toxicology.Papers regarding components of food especially nutrients and non-nutrient bioactive compounds(with putative health benefits)are welcomed.FSHW aims to unveil the correlations between food science and human health through the dissemination of both fundamental and applied research outcomes worldwide.
