22-4 ?唱??

TѦܦhΡAFWzyѥ~Aڭ̲{bӽͽͭ˯ΡCAO_ggUCpG

oɭԧAݭnOuۿqv]query by singing/hummingA² QBSH^AyܻAAiHۤ@qD۫ߡAqAѥXӳoO@qCoO@Ӧ쪺ΡADny{pUG

  1. ϥΪ̪ۿJi歵lܡ]pitch tracking^AHHɶܪVqC
  2. ϥΫezVqAPƮwqiAX̱񪺫eQqC

ڭ̥AѡAbܩΰۺqɭԡAڭ̳q`ʿn_ʡA~ಣͶgʪiΡ]SOO^A]n_WߴN٬WvAqqnAڭ̧ƱWvHɶܪVq]٬Vq^AھڦVqAڭ̤~MƮwqiAX̬ۦqC

ЯSO`NA𭵪iγq`SWߩʡA]]㦳WvCAiHլݬݡANAbVWAéCt׻uCvAAiHoıAbouvɡAVOSʪAnOѦYMŮ𪺫tyʩҲ͡AbouvɡAV}liWߩʾ_ʡAe{b~iΤ]NFWߩʡAШUCϨҡC


5.GNiΩjAiHoı@lSgʡAӥh㪺gʡAҥH]NTC

ѤWzϧΥiHݨAܩ㪺WߩʡA]ڭ̥iH[kӧX򥻶gApPĤGp`ҭzAkäAOYnϥιqӦ۰ʧ쭵ANݭn@ǧ޳NFIo̦ܦhkiHΨӧ쭵A̪ı@ؤkA٬۬ơ]audo-correlation functionA² ACF^AzO@ӭؤжi業ΤnA̫X@ ACF uAA즹uĤG̤jȪmAmXyЩMIjAYO򥻶g]HI^Aڭ̦AN˲vHWz򥻶gAYioCX{򥻶gơAoNO]H Hz AoM˲v Hz S^AܷNϦpUҥܡC


5.GϥACFӭp@ӭتC

]ڭ̨ϥ $s(i)$ ӥNؤ i ӰTȡA ACF iHܦpUG $$ acf(\tau)=\sum_{i=0}^{n-1-\tau}s(i)s(i+\tau) $$ yܻANبCVk@IAM쥻ت|nA n |o n ӤnȡAoNO ACF uC $\tau=0$ ɡAACF |@ӳ̰IAoOڭ̭n䪺IC $\tau$ CCܤjɡAĤ@Ӱ򥻶g|MĤGӰ򥻶g|b@_A ACF S|X{ĤGӰIAoӰINOڭ̭n䪺IAIX{mANOڭ̭n䪺򥻶gC

ھڤWzAڭ̴NiH@qnTiءBp ACFBp⭵AöiӧX@qnVqAOѤFAROSA]٥pCӭتq]i²wqCӭؤTM^AYqӤpAhNت]wsANSC

ϥΤWz ACF IkANiH@qni歵lܡAdҦpUG


5.G@qTpA䤤pϤ@OqniιϡApϤGOqu]uqeȡ^ApϤThOuC

bWϤ@TӤpϡApUG

@쭵uAڭ̭nMƮwqiCMAƮwC@q]OƥনVqΦAq`ڭ̨ت׬O 32 msA]C| 1/32 = 31.25 ӭIAY@q 3 AVqN| 3*60*31.25 = 5625 ICӧڭ̪ۿJqnAYH 8 ҡAh| 8*31.25 = 250 ӭȡAڭ̪ؼСANOnXbo 5625 I̭A@q̹ڭ̰ۥXӪ 250 ӭȡC

Aڭ̻u̹vɡAoO@ӼҽkAҿסuvΡuvAھکڭ̩ҥΨ쪺ZơAZVphVAϤAhVCbpqVqZɡAڭ̥Ҽ{UCDG

Ĥ@ӰDAڭ̥iHNqP@ӭǡAAiCĤGӰDAڭ̥iH]tתܤƬOê]Ytק֡ANqY֨FYCANqYCAӤ|֩C^AbpUAڭ̴NiHĥΡuuʦYv]linear scalingA² LS^kӶiApUϩҥܡG


5.Gϥ LS ӭpqnMƮwqZAHҦӨAYO 1.25 ɡAiHo̵uZC

ѤWϤiHݥXAڭ̱NJVqԪ 1.25 ]PɱNJVqȥqVqȡ^ANMƮwY@qo̪񪺶ZAZYOJVqMqZC]bZƥiH²awqӦVqbתŶuZC^]b@qɡAڭ̥iHդPYơAҦpq 0.5B0.51B0.52B...B1.49B1.50 A@ 101 إiAӧX̨ΪYƥHι̵uZCYƮw 1000 qANo 1000 ӳ̵uZAڭ̥iھڳoǶZӱƧǡAZVuqANViOڭ̭۪qC

Hint
pGAۺq֩CAoɭԴNϥ LSAӭnϥιBqj DTW]dynamic time warping^kӶiC

ܦAڬ۫Hjaۿqwg@Ӱ򥻪AѡAγ\A̷|ݡAU@BOH٦޳ND|ݧJAHD٫ܦhAs]@biAHUCXXIG

Ĥ@ӧxIAAi|ݡGOHճťoX MP3 ֤HnڡAqHAoO@ӤjvݡAڭ٤OܩTaDHp󰵳oơAڭ̩TaDqoưnCC~@ӥ@ɪWQ| International Society of Music Information Retrieval]² ISMIR^||U˯A䤤@O audio melody extractionAMC~įೣW[Aثe raw pitch accuracy ٤ 85%AiHթMHbثeTqF`ܦhCMաAq@biBAӤHiBTצAuqաvlWuHաviuOɶDI

@~

  1. бqWM@ӮiܺAӹխۿqiܨtΡC
    1. Х`aۤ@q䤤@yAаݮiܨtΥiHA۪qܡH
    2. pGAbۺqɩ֩CAtٯॿTqܡH

Audio Signal Processing and Recognition (TBzP)