隨著語音技術(shù)應(yīng)用的發(fā)展,語音信號數(shù)字處理的實時性要求越來越突出。這就要求在系統(tǒng)設(shè)計中,對系統(tǒng)的硬件環(huán)境要求更高。隨著語音處理算法的日益復(fù)雜,用普通處理器對語音信號進(jìn)行實時處理,已經(jīng)不能滿足需要。專用語音信號處理芯片能解決實時性的要求,同時對器件的資源要求也是最低的。 論文利用Altera公司的新一代可編程邏輯器件在數(shù)字信號處理領(lǐng)域的優(yōu)勢,對語音信號的常用參數(shù)—LPC(線性預(yù)測編碼,Linear Predictive Coding)參數(shù)提取的FPGA(現(xiàn)場可編程門陣列,F(xiàn)ield Programmable Gate Array)實現(xiàn)進(jìn)行了深入研究。論文首先對語音的離散數(shù)學(xué)模型和短時平穩(wěn)特性進(jìn)行了分析,深入討論了語音線性預(yù)測技術(shù)。第二,對解線性預(yù)測方程組的自相關(guān)法和協(xié)方差斜格法進(jìn)行了比較,提出了一種基于協(xié)方差斜格法的LPC參數(shù)提取系統(tǒng)的總體設(shè)計方案。第三,對Altera公司的Cyclon系列可編程器件的內(nèi)部結(jié)構(gòu)進(jìn)行了研究,分析了在QuartusⅡ開發(fā)平臺上進(jìn)行FPGA設(shè)計的流程。第四,對系統(tǒng)的各個功能模塊進(jìn)行了設(shè)計,所有算法通過Verilog硬件描述語言實現(xiàn),并對其工作過程進(jìn)行了詳細(xì)的分析。最后,在Altera FPGA目標(biāo)芯片EP1C6Q240C8上,對LPC參數(shù)提取系統(tǒng)進(jìn)行了仿真驗證。 系統(tǒng)具有靈活的輸入輸出接口,能方便地同其它語音處理模塊相連,構(gòu)成一個完整的語音處理專用芯片,可以應(yīng)用于語音編解碼、語音識別等系統(tǒng)。
上傳時間: 2013-04-24
上傳用戶:TI初學(xué)者
·G.711,G.723.1,G.726,G.729,GSM CODEC C/C++ code 文件列表: ipp_sample ..........\speech-coding ..........\.............\application ..........\.............\...........\usc
標(biāo)簽: nbsp 723.1 CODEC code
上傳時間: 2013-06-18
上傳用戶:wmwai1314
·詳細(xì)說明:汽車牌照的自動定位和識別程序源代碼-source code for automatic license plate location and recognition文件列表: 車牌定位 ........\ChildFrm.cpp ........\ChildFrm.h ........\ColorTable.h ...
上傳時間: 2013-05-18
上傳用戶:Divine
One of the most misunderstood constructs in the Verilog language is the nonblockingassignment. Even very experienced Verilog designers do not fully understand how nonblockingassignments are scheduled in an IEEE compliant Verilog simulator and do not understand whenand why nonblocking assignments should be used. This paper details how Verilog blocking andnonblocking assignments are scheduled, gives important coding guidelines to infer correctsynthesizable logic and details coding styles to avoid Verilog simulation race conditions
上傳時間: 2013-10-17
上傳用戶:tb_6877751
這篇文章討論了不同HDL代碼的編寫方式,對綜合結(jié)果的影響。閱讀本文對深入了解綜合工具和提高HDL的編寫水平有不少幫助,原文時針對Synopsys的綜合軟件論述的,但對所有綜合軟件,都有普遍的借鑒意義
標(biāo)簽: Synthesis Coding Styles Guide
上傳時間: 2014-12-23
上傳用戶:huql11633
針對科研實驗中對拉壓千斤頂加載過程控制的需要,采用ATmega128單片機(jī)控制步進(jìn)電機(jī)進(jìn)而實現(xiàn)對執(zhí)行系統(tǒng)的電動泵站實行自動控制。對力和位移的數(shù)據(jù)采集與處理及用步進(jìn)電機(jī)控制電動泵站手柄的技術(shù)細(xì)節(jié)作了重點描述。通過單片機(jī)的A/D變換器對AMP放大模塊采集的電橋信號作量化處理,千斤頂?shù)牟倏厥直恢靡离妱佑捅瞄y門開啟的方向和大小作若干定位,單片機(jī)根據(jù)力或位移傳感器信號,實時控制步進(jìn)電機(jī)驅(qū)動手柄旋轉(zhuǎn)到相應(yīng)操控位置。 Abstract: This article describes the use of ATmega128 AVR microcontroller series of DBS electric pumping stations and QF100/200 separate twoway hydraulic jack to automate the process of manipulating the work of the technical content. Articles on force and displacement data acquisition and processing, and stepper motor control electric pump with the handle of the key technical details were described. Through the MCU’s A / D converter module is collected on the AMP amplification quantify the signal bridge, jack handle position control valve opening according to the direction of electric pumps for a number of positioning and size of the microcontroller based on force or displacement sensor signals, real-time control stepper motor drive control handle rotate to the appropriate location.
標(biāo)簽: AVR 單片機(jī) 閉環(huán)控制
上傳時間: 2014-01-16
上傳用戶:hasan2015
BIT_SELFREFRESH EQU (1<<22) ;定義SDRAM自刷新標(biāo)志位 16 17 ;Pre-defined constants 預(yù)定義6種工作模式 18 USERMODE EQU 0x10 ;用戶模式 19 FIQMODE EQU 0x11 ;快速中斷模式 20 IRQMODE EQU 0x12 ;中斷模式 21 SVCMODE EQU 0x13 ;監(jiān)管模式 22 ABORTMODE EQU 0x17 ;異常中斷模式 23 UNDEFMODE EQU 0x1b ;未定義模式 24 25 MODEMASK EQU 0x1f ;模式掩碼 26 NOINT EQU 0xc0 ;取消中斷 27 28 ;The location of stacks;設(shè)置6種工作模式的堆棧的起始地址 29 ;在option.inc中定義了_STACK_BASEADDRESS EQU 0x33ff8000 30 UserStack EQU (_STACK_BASEADDRESS-0x3800) ;0x33ff4800 ~ 31 SVCStack EQU (_STACK_BASEADDRESS-0x2800) ;0x33ff5800 ~ 32 UndefStack EQU (_STACK_BASEADDRESS-0x2400) ;0x33ff5c00 ~ 33 AbortStack EQU (_STACK_BASEADDRESS-0x2000) ;0x33ff6000 ~ 34 IRQStack EQU (_STACK_BASEADDRESS-0x1000) ;0x33ff7000 ~ 35 FIQStack EQU (_STACK_BASEADDRESS-0x0) ;0x33ff8000 ~
上傳時間: 2013-10-07
上傳用戶:m62383408
MMC/SD卡以其優(yōu)越的性能,在單片機(jī)嵌入式設(shè)備中得到廣泛應(yīng)用。將MMC/SD卡作為外部掉電存儲介質(zhì)應(yīng)用于音頻信號發(fā)生器中,通過8051F330單片機(jī)上的SPI接口,實現(xiàn)單片機(jī)—MMC/SD卡的存儲擴(kuò)展,設(shè)計了此硬件平臺上的MMC/SD卡的單片機(jī)驅(qū)動程序,并給出了相應(yīng)的程序代碼,滿足音頻信號發(fā)生器的大容量存儲要求。 Abstract: MMC/SD card is more and more widely used in the single chip embedded devices for their excellent performances.This article introduces the application of MMC/SD card as the external power down storage medium in audio signal generator. The extension technology especially for storage of single chip-MMC/SD card via SPI interfaces in 8051F330 single chip, including designs single chip drive program of MMC/SD card based on hardware platform,and also gives the key coding of the program. The implementation of big capacity storage is meaningful in audio signal generator.
標(biāo)簽: 8051F330 音頻信號 發(fā)生器
上傳時間: 2014-12-27
上傳用戶:黃華強(qiáng)
基于ADSP-BF561的數(shù)字?jǐn)z像系統(tǒng)設(shè)計Design of Digital Video Camera System Based on Digital Signal ProcessorADSP-BF561(浙江大學(xué) 信息與通信工程研究所,浙江 杭州 310027) 馬海杰, 劉云海摘要:介紹了基于ADI雙核的數(shù)字信號處理芯片ADSP-BF561 的數(shù)字?jǐn)z像系統(tǒng)實現(xiàn)方案。系統(tǒng)包括硬件和軟件兩部分,硬件主要有ADSP-BF561及其外圍電路、音視頻模數(shù)/數(shù)模轉(zhuǎn)換、CF卡/微硬盤接口等部分。軟件主要有操作系統(tǒng)及音視頻編解碼算法等部分。關(guān)鍵詞:ADSP-BF561 ;數(shù)字?jǐn)z像機(jī);微硬盤;MPEG-4;A/D;D/A中圖分類號:TN948.41文獻(xiàn)標(biāo)識碼:AAbstract: An implementation of digital video camera system based on ADI dual core digital signal processor ADSP-BF561 is introduced. The system can be divided into two parts——hardware and software design. The hardware design includes ADSP-BF561 and perpheral apparatus, A/D,D/A, CF card or Microdrive and so on. The software includes operating system , audio and video coding algorithm.Key words: ADSP-BF561; digital video camera; microdrive; MPEG-4;A/D;D/A
標(biāo)簽: ADSP-BF 561 數(shù)字?jǐn)z像 系統(tǒng)設(shè)計
上傳時間: 2013-11-10
上傳用戶:yl1140vista
叫你如何擁有良好的編碼風(fēng)格
上傳時間: 2013-11-06
上傳用戶:yt1993410
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