2．系統(tǒng)構(gòu)成與原理
R88D-UP08V語(yǔ)音識(shí)別主要包括兩個(gè)階段：訓(xùn)練階段和識(shí)別階段。在訓(xùn)練或識(shí)別過(guò)程中，都必須對(duì)輸入語(yǔ)音進(jìn)行預(yù)處理和特征提取。訓(xùn)練階段通過(guò)用戶輸入的若干次訓(xùn)練語(yǔ)音，經(jīng)過(guò)預(yù)處理和特征提取后得到特征參數(shù)，最后通過(guò)特征參數(shù)建模，進(jìn)而建立訓(xùn)練語(yǔ)音的參考模型庫(kù)。而識(shí)別階段是將輸入語(yǔ)音的特征矢量參數(shù)和參考模型庫(kù)中的參考模型進(jìn)行相似性度量，然后把相似度最高的輸入特征矢量作為識(shí)別結(jié)果輸出，從而達(dá)到語(yǔ)音識(shí)別目的，如圖1所示。
R88D-UP08V語(yǔ)音識(shí)別技術(shù)可分為：特定人識(shí)別和非特定人識(shí)別兩種。特定人識(shí)別是指需要對(duì)待識(shí)別人的語(yǔ)音進(jìn)行采集訓(xùn)練，識(shí)別對(duì)象為專門的人；非特定人識(shí)別是指識(shí)別對(duì)象為大多數(shù)用戶，一般要采集多個(gè)人的語(yǔ)音進(jìn)行錄音、訓(xùn)練和學(xué)習(xí)，從而達(dá)到較高的識(shí)別率。
R88D-UP08V在實(shí)際應(yīng)用中，現(xiàn)代技術(shù)開發(fā)嵌入式語(yǔ)音識(shí)別有兩種實(shí)現(xiàn)方式：調(diào)入嵌入式語(yǔ)音開發(fā)包和外擴(kuò)語(yǔ)音識(shí)別芯片。本文的語(yǔ)音識(shí)別系統(tǒng)方案是以嵌入式處理器S3C2440為核心，外擴(kuò)非特定人語(yǔ)音識(shí)別芯片LD3320，并將超聲波測(cè)距模塊和云臺(tái)相結(jié)合作為系統(tǒng)的機(jī)械執(zhí)行機(jī)構(gòu)。系統(tǒng)測(cè)量過(guò)程如下：首先根據(jù)語(yǔ)音指令控制兩自由度云臺(tái)的位姿，使超聲波探測(cè)器指向特定方向，然后開啟超聲波探測(cè)器，測(cè)量出前方障礙物距離，最后將測(cè)量結(jié)果轉(zhuǎn)化為可以播放的二進(jìn)制數(shù)據(jù)流，通過(guò)LD3320的播放功能完成數(shù)據(jù)的播放。
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R88D-UP08V
R88D-UP12HA AC200V 400W
R88D-UP12LA AC100V 200W
R88D-UP12V
R88D-UP15LA AC100V 300W
R88D-UP20HA AC200V 750W
R88D-UT120H AC200V 5.0KW
R88D-UT24H AC200V 1.0KW
R88D-UT40H AC200V 1.5KW
R88D-UT40V
R88D-UT60V
R88D-UT80H AC200V 3.0KW
R88D-UT80V
R88D-WT01H
R88D-WT01HL
R88D-WT02H
R88D-WT02HL
R88D-WT04H
R88D-WT05H
R88D-WT08H
R88D-WT10H
R88D-WT150H
R88D-WT15H
R88D-WT20H
R88D-WT30H
R88D-WT50H
R88D-WT60H
R88D-WT75H
R88D-WTA3H
R88D-WTA3HL
R88D-WTA5H
R88D-WTA5HL
R88M-H05030 AC50W
R88M-H10030 AC100W
R88M-H10030-B AC100W
R88M-H1K130 AC1100W
R88M-H1K130-B AC1100W
R88M-H20030 AC200W
R88M-H20030-B AC200W
R88M-H20030-G25BJS1
R88M-H30030 AC300W
R88M-H30030-B AC300W
R88M-H50030-B AC500W
R88M-H75030 AC750W
R88M-H75030-B AC750W
R88M-U03030HA
R88M-U03030HA-B
R88M-U03030HA-BS1
R88M-U03030HA-S1
R88M-U03030LA
R88M-U05030HA
R88M-U05030HA-B
Applied Materials PRODUCER 200MM SST LID KIT H2O RETRO FIT 0242-11877
(AA01) AMAT APPLIED MATERIALS 0020-21664 INSULATOR SOURCE 13" NEW
NEW LISTING APPLIED MATERIALS, AMAT, 0021-27290, ISOLATOR/RING ,0021-27290,TEFRON RING
APPLIED MATERIALS, AMAT, 0200-00374, ISOLATOR 300mm, HDPCVD ULTIMA
Applied Materials AMAT Kalrez O-Ring, 3700-02161
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Applied Materials AMAT Valve Manifold, 0050-26967
APPLIED MATERIALS 0010-09340W SUSCEPTOR LIFTER NEW
APPLIED MATERIALS 0010-09441 WAFER LIFT ASSY, POSN D
Applied Materials 0020-76698 SHUTTLE, MAGLIFT ASSY, 300MM DSA AMAT
APPLIED MATERIALS (AMAT) ACTUATOR KIT P/N 3870-05023
Applied Materials AMAT CMP Power Cable, 0150-05327
Applied Materials AMAT 8" TTN Pedestal, 0021-11075
Applied Materials 0020-60756 SHIELD, GRIPPER LASER SENSOR AMAT
AMAT 0020-39087, Pedestal, ESC 195mm, 8" Notch, DPS, APPLIED MATERIALS
Applied Material AMAT CDS Systems Lamp Module 5000 Precision **GREAT CONDITION**
Applied Material AMAT Module MFG Lamp 8" WSIX-DCS CENTURA / Gold
Applied Materials (AMAT) 0010-09324 ASSY ELECTRONICS,LIQUID SOURCE
APPLIED MATERIALS (AMAT) 70509090000 COLUMN LINER BACKUP
APPLIED MATERIALS (AMAT) 0100-09034 wPCB ASSY, LIQUID SOURCE INTERFACE
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Applied Materials AMAT Setra VCR Pressure XDCR, 2231100PABW2CD1M, 1350-00049
APPLIED MATERIALS (AMAT) ASSEMBLY THROTTLE VALVE 300MM DUAL FLA 0010-14862-USE
APPLIED MATERIALS (AMAT) LINER CATHODE DIRECT-COOLED BAFFLE E 0040-83331-USED
APPLIED MATERIALS (AMAT) LINER CATHODE DIRECT-COOLED BAFFLE Y2 0041-05535-USED
APPLIED MATERIALS (AMAT) ASSEMBLY THROTTLE VALVE 300MM DUAL FLA 0010-14862-USE
APPLIED MATERIALS (AMAT) BELLOWS 0040-39066
