本文關(guān)鍵詞： 無線錄音 無線話筒 單片機(jī) 鎖相環(huán) 紅外遙控 VHF　出處：《華中師范大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著計(jì)算機(jī)和多媒體技術(shù)的廣泛普及,多媒體教學(xué)已由高校至中學(xué)逐漸普及開來,除了教學(xué)采用多媒體以外,會(huì)議系統(tǒng)也引入了這一技術(shù),借助多媒體技術(shù),會(huì)議在傳統(tǒng)的文字文件的基礎(chǔ)上添加了直觀的圖片和數(shù)據(jù)報(bào)表,使得會(huì)議內(nèi)容變得豐富多彩,明了易懂。 無論是課堂教學(xué)還是會(huì)議系統(tǒng),都會(huì)涉及內(nèi)容記錄的問題,有些重要的課堂和會(huì)議在文筆記錄的同時(shí)還需要語音記錄,此外在影視娛樂節(jié)目的制作過程中也需要錄音,目前普通的錄音筆只能憑借用戶手持錄音,這種方式在上述場(chǎng)合應(yīng)用時(shí)通常距離被錄者較遠(yuǎn),錄制到的聲音中環(huán)境背景噪音大,距離遠(yuǎn)了噪聲甚至能蓋過被錄者的聲音,難以達(dá)到令人滿意的效果。 本文旨在設(shè)計(jì)一種小體積、低成本、低功耗、無失真、使用方便的無線音頻錄制系統(tǒng)以滿足課堂錄音之用,同時(shí)還可以應(yīng)用在會(huì)議系統(tǒng)和影視娛樂節(jié)目的制作中,具有非常廣闊的市場(chǎng)前景。 本文針對(duì)上述場(chǎng)合中廣泛使用的無線話筒工作原理進(jìn)行深入研究,使得系統(tǒng)能夠自動(dòng)鎖定并穩(wěn)定接收市面上大部分主流無線話筒的音頻信號(hào),具有極強(qiáng)的通用性,降低了系統(tǒng)的應(yīng)用成本。 系統(tǒng)在硬件方面以Atemel公司的AVR系列單片機(jī)ATmega16為中央處理器,應(yīng)用PHILIPS公司的TEA5767接收FM頻段,索尼公司的CXA1691與鎖相環(huán)MCD2005RX組合接收VHF200MHz頻段,所接收到的無線話筒信號(hào)由WTV-NAND錄制保存為MP3、WAV格式并通過USB接口上傳至電腦,同時(shí)也可現(xiàn)場(chǎng)回放錄音文件。全部操作過程可由紅外遙控,增強(qiáng)了用戶的使用便利性。 在軟件方面主要采用C語言編程,使系統(tǒng)一方面能根據(jù)已知無線話筒頻率固定接收信號(hào),另一方面在未知情況下自動(dòng)搜索話筒的信號(hào)頻率并鎖定接收,同時(shí)將信號(hào)強(qiáng)弱、錄音時(shí)長(zhǎng)、話筒頻率等相關(guān)信息顯示在液晶屏上,增強(qiáng)用戶的體驗(yàn)感。 實(shí)驗(yàn)結(jié)果表明,本系統(tǒng)能夠自動(dòng)搜索到當(dāng)前無線話筒的信號(hào)并鎖定接收,同時(shí)將接收到的音頻信號(hào)保存在存儲(chǔ)卡上。整個(gè)系統(tǒng)達(dá)到了設(shè)計(jì)初衷,取得了令人滿意的錄音效果。
[Abstract]:With the wide popularization of computer and multimedia technology, multimedia teaching has been gradually popularized from university to middle school. In addition to the use of multimedia in teaching, the conference system has also introduced this technology, with the help of multimedia technology. Based on the traditional text documents, the conference adds intuitive pictures and data reports, which makes the content of the meeting colorful and easy to understand. Both classroom teaching and conference system will involve the problem of content recording, some important classes and meetings in writing records, but also need voice recording. In addition, in the production of entertainment programs in the process of recording, the current ordinary recording pen can only rely on the user hand-held recording, this way in the application of the situation is usually far away from the recorded. It is difficult to achieve satisfactory results because the background noise of the recorded sound is high, the distance is far away and the noise can even cover the voice of the recorded person. The purpose of this paper is to design a wireless audio recording system with small volume, low cost, low power consumption, no distortion and convenient use to meet the needs of classroom audio recording. At the same time, it can also be used in the production of conference system and entertainment program, which has a very broad market prospect. In this paper, the working principle of wireless microphone which is widely used in the above occasions is deeply studied, so that the system can automatically lock and receive the audio signal of most of the mainstream wireless microphone in the market. It has strong generality and reduces the application cost of the system. In the hardware aspect, the ATmega16 of AVR series of Atemel company is used as the central processor, and the TEA5767 of PHILIPS Company is used to receive FM frequency band. Sony's CXA1691 and PLL MCD2005RX are combined to receive the VHF200MHz band, and the received wireless microphone signals are recorded by WTV-NAND and saved as MP3. The WAV format is uploaded to the computer through the USB interface. At the same time, the recording file can also be replayed on the spot. The whole operation process can be controlled by infrared remote control, which enhances the convenience of the user. In the software aspect, C language is mainly used to program the system. On the one hand, the system can fix the received signal according to the known frequency of the wireless microphone, on the other hand, it can automatically search the frequency of the microphone and lock the receiver in the unknown situation. At the same time, the signal intensity, recording time, microphone frequency and other related information are displayed on the LCD screen to enhance the user's experience. The experimental results show that the system can automatically search the current wireless microphone signal and lock the receiver, while the received audio signal is stored on the memory card. The whole system achieves the design intention. Satisfactory recording effect has been obtained.
【學(xué)位授予單位】：華中師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TN912.2;TP368.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周正干;黃鳳英;倪先勝;;超外差接收相敏檢波在電磁超聲檢測(cè)中的應(yīng)用[J];北京航空航天大學(xué)學(xué)報(bào);2011年03期

2 張文甲;;IIC總線通信中主機(jī)控制器的設(shè)計(jì)與應(yīng)用[J];電腦知識(shí)與技術(shù)(學(xué)術(shù)交流);2007年01期

3 付莉;;淺談超外差式接收機(jī)工作原理及應(yīng)用[J];電腦知識(shí)與技術(shù);2011年16期

4 劉斌儒;戴勇;;基于AVR單片機(jī)Mega16的電子時(shí)鐘設(shè)計(jì)[J];國(guó)外電子元器件;2008年07期

5 曾真;王健;;分析儀器中ⅡC總線異常的自動(dòng)恢復(fù)[J];工業(yè)儀表與自動(dòng)化裝置;2010年02期

6 龍丕強(qiáng);;自制簡(jiǎn)易調(diào)頻收音機(jī)[J];電子制作;1996年09期

7 蘆濤;;用單片集成電路組裝調(diào)頻收音機(jī)[J];電子制作;2005年02期

8 張公禮;王東明;;嵌入式Linux下紅外遙控解碼的驅(qū)動(dòng)設(shè)計(jì)[J];杭州電子科技大學(xué)學(xué)報(bào);2007年06期

9 朱斌;譚勇;奐光曉;;基于紅外遙控的智能時(shí)鐘設(shè)計(jì)與實(shí)現(xiàn)[J];機(jī)電產(chǎn)品開發(fā)與創(chuàng)新;2008年01期

10 袁易君;甘輝;;基于AVR煤礦風(fēng)機(jī)多點(diǎn)溫度監(jiān)測(cè)儀的研究[J];煤礦機(jī)械;2008年07期

相關(guān)碩士學(xué)位論文 前2條

1 郝慶生;紅外遙控器性能及壽命測(cè)試臺(tái)[D];合肥工業(yè)大學(xué);2007年

2 李倩;紅外遙控器檢測(cè)儀[D];山東大學(xué);2009年

，

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