基于dsp的語音信號采集與回放系統(tǒng)的設(shè)計開題報告(存儲版)
【正文】 標(biāo)。VoIP技術(shù)可以讓企業(yè)降低成本，鞏固和簡化網(wǎng)絡(luò)，提高客戶服務(wù)應(yīng)用。三、畢業(yè)設(shè)計（論文）研究方案及工作計劃（含工作重點(diǎn)與難點(diǎn)及擬采用的途徑）此研究項(xiàng)目具有高速、實(shí)時、靈活的特點(diǎn)，實(shí)現(xiàn)了一個完整的語音信號數(shù)字化處理系統(tǒng)，可以對模擬信號進(jìn)行采集、處理、播放等功能，并且可以用有限的存儲空間存儲較多的數(shù)字語音信號，完成多種語音處理功能。對語音信號的傳輸，希望是傳輸?shù)乃俣缺M量得快，傳輸質(zhì)量盡量的高；對語音信號的存儲，希望存儲的空間盡量的小，存儲的信息盡量的多。例如，用戶不用先進(jìn)入某個網(wǎng)址并輸入股票名字或者瀏覽預(yù)定義列表，可以通過語音命令實(shí)現(xiàn)。今天的個人手持設(shè)備語音大多時候僅僅局限于語音撥號，但是已經(jīng)出現(xiàn)了適用于更廣泛開發(fā)語音識別和文本到語音應(yīng)用的技術(shù)。二、畢業(yè)設(shè)計（論文）研究現(xiàn)狀和發(fā)展趨勢（文獻(xiàn)綜述）語音信號是最重要的信息載體之一。用數(shù)字化的方法進(jìn)行語音的傳送、存儲、分析、識別、合成、增強(qiáng)等是整個數(shù)字化通信網(wǎng)中的最重要、最基本的組成部分之一 。為了減少語音信號所占用的帶寬或存儲空間，就必須對數(shù)字語音信號進(jìn)行壓縮編碼。其他潛在的語音應(yīng)用包括如下幾個方面。（4）語音瀏覽。所以，研究語音編碼算法，也具有十分重要的價值，是目前語音信號處理最廣泛的算法。DSP外圍數(shù)字IC技術(shù)手冊[M].北京：外文文獻(xiàn)：Since the mid1990s, Voice Over IP (VoIP) has steadily changed the telemunications industry. The convergence of data and voice in the munications market allows for valueadded services not available on traditional circuitbased networks, not to mention cost saving advantages. VoIP technology enables businesses to reduce costs, consolidate and simplify networks, and improve customer service applications. VoIP, once viewed as just a new technology, is now recognized as a reliable and costeffective business solution. What does it mean to the call recording industry? To remain petitive, businesses that develop call recording applications must now implement VoIP solutions. This paper introduces VoIP recording and differentiates it from traditional circuitbased recording. It begins with an overview of the IP telephony network then examines the unique challenges of VoIP call recording. Finally, the paper presents Audio Codes’ VoIP recorders, a suite of hardware ponents designed to support VoIP call recording applications.What do Customers Expect from VoIP Recording?For a business that purchases a call recorder, VoIP simply allows networks to carry telephone conversations. Customers who already have a conventional recording system expect enhanced capabilities from a new VoIP recorder. Customers who are new to call recording have their unique business requirements in mind and are looking to solve their business objectives. Ultimately, customers focus on the recording product’s features, rather than on the underlying VoIP technology.Application developers who design call recording systems recognize VoIP technology’s ascendancy. It is a fact: to remain petitive in the call recording market, a VoIP recorder is a must. This recorder must be able to provide at least the same features available on PSTN recording applications.All call recording systems rely on hardware ponents that tap into the telephone network and pull data into a recording application. Similarly, all recording applications require the same data: the voice conversation (for recording purposes), the call control information (to monitor call states), and data for value added services (DTMF, CallerID, etc.).
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