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H> n ITS (Intelligent Transport System) • 1-;?% .@6$(&)B:, K)*I)+ n A • 6$

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n %* • #-+ ( • "$1)%* !./' 0%,& ं྆૸ߦԻ ૸ߦํ޲ ଎౓ ं྆छผ ૸ߦंઢ 4

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.; n '$8?7)SAVeD [Ishida+18] • OR0+19QF83% n !*2 [Ishida+19] • FG77% n ICB>6, 8?

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*-BE n JF%6>G:H) • KL3=YC9M/P [Aljaafreh+10] [Changjun+09] [Munich+04] • !#"D? [Yang+07] ⇒T36>JS 8U n NJF%6>G:H) • ETC ⇒ &R4VO • % !$;W7I [Hongliang+04] • 6>';W7I [Avery+04] ⇒X@Z[(Q,A+1<5<0.2 6 [Aljaafreh+10] “An evaluation of feature extraction methods for vehicle classification based on acoustic signals”, IEEE ISNSC [Changjun+09] “The research of vehicle classification using SVM and KNN in a ramp”, IFCSTA [Munich+04] “Bayesian subspace methods for acoustic signature recognition of vehicles”, EUSIPCO [Yang+07] “Vehicle identification using wireless sensor networks”, IEEE SoutheastCon [Hongliang+04] “A hybrid license plate extraction method baed on edge statistics and morphology”, ICPR [Avery+04] “Length-based vehicle classification using images from uncalibrated video cameras”, IEEE ITSC

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! n % + ", • # % '* ⇒ % !+ -)( & $ 8 Vehicle Sound t t t t Left Right Vehicle sound arrives at slight different time depending on vehicle location Compensate the time difference Emphasized Sound ∆t ∆t

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:$;*/-4,# 10 n SAVeD+) [Ishida+18] • ! :$;=7%&6> " >2 • RANSAC) S8" • ".05%

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11 1. '" 2. %'" !* +$#Δ" (), 3. &'" t Left Right t f f Prepare for windowed data f Shift in time and add to right- channel data FFT FFT

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n 67% SVM • 4 ,#0 n ,:2 • 10kHz&67%$; • 67%$.!1"'9LPF )-3*4 12 5+! ( 8 (SVM) )-/

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9.64 (2) 15 n +,2$1 :->708# n ,270(: 3 • =$,46/78/18/$1 n 5%);: 320ms n FFT : 4096' (≅85.3ms) • 25% n ,2$1": "#$%% = 2.0s • ,2$1< ! *"#$%% &9. ⇒3FFT ,2708#

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16 ⇒ 4.71% • normal bike bus Estimated Type normal bike bus Actual Type 89.06 7.44 3.49 8.54 87.33 4.13 2.92 2.58 94.50 normal bike bus Estimated Type normal bike bus Actual Type 94.24 3.74 2.02 4.38 93.49 2.13 1.59 1.11 97.30 : 90.30% (): 95.01%

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n ITSDK(.&.% • DK 6J BI n ')-"+!$ GDK(.&.% • Z=DLDKC08;A • Z=-.DKW 1TDK O Q W E[ DKRI S4 n X/V?#,.*'5@MUF8N • Y795.01%DKRI S4 • 239<6JDK>:PH 19

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© 2019 Shigemi ISHIDA licensed under CC BY-NC 4.0