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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>南京藝術(shù)學(xué)院音頻試題,音頻</p><p><span>***更新：</span>2021-01-23 03:10:19</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="iwjqx7c" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海懷嚴(yán)文化傳媒有限公司</a></p><p><span>聯(lián)系人：</span>曹晨光</p><p><span>郵箱: </span>deforu@163.com</p><p><span>電話(huà): </span>13611988611</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.oranshine.com</p><p><span>手機(jī): </span>021-64458098</p><p><span>地址: </span>宜山路508號(hào)3E室</p><p>[當(dāng)前離線(xiàn)] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3x2yq3m" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="m8mjg2y" class="box"><p><p style="text-indent:25px">新生代音頻：ogg格式完全開(kāi)源，完全**，南京藝術(shù)學(xué)院音頻試題，和mp3不相上下的新格式。與MP3類(lèi)似，OGGVorbis也是對(duì)音頻進(jìn)行有損壓縮編碼，但通過(guò)使用更加先進(jìn)的聲學(xué)模型去減少損失，因此，相同碼率編碼的OGGVorbis比MP3音質(zhì)更好一些，文件也更小一些，南京藝術(shù)學(xué)院音頻試題。另外，MP3格式是受**保護(hù)的。發(fā)布或者銷(xiāo)售MP3編碼器，南京藝術(shù)學(xué)院音頻試題、MP3解碼器、MP3格式音樂(lè)作品，都需要付**使用費(fèi)。而OGGVorbis就完全沒(méi)有這個(gè)問(wèn)題。OGGVorbis雖然還不普及，但在音樂(lè)軟件、游戲音效、便攜播放器、網(wǎng)絡(luò)瀏覽器上都得到廣fan支持。大家都承認(rèn)是一個(gè)數(shù)碼時(shí)代，為追求優(yōu)良的音質(zhì)很多人做出了不懈的努力。南京藝術(shù)學(xué)院音頻試題</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京藝術(shù)學(xué)院音頻試題,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038200786624/1658323.png"></div><p style="text-indent:25px">模擬音頻技術(shù)和數(shù)字音頻技術(shù)的優(yōu)缺點(diǎn)：模擬音頻在記錄、編輯、重放過(guò)程中進(jìn)來(lái)的雜音不能與有用信號(hào)分開(kāi)，噪聲呈積累性質(zhì)，信號(hào)轉(zhuǎn)錄受到極大的限制。而數(shù)字音頻如果記錄格式(采樣頻率、量化)確定，性能的極限也就確定，而且轉(zhuǎn)錄沒(méi)有任何損失。模擬音頻中記錄的媒質(zhì)的信噪比代替了原信號(hào)的信噪比，而數(shù)字音頻信噪比和重放信號(hào)的信噪比沒(méi)有直接關(guān)系，記錄重現(xiàn)性比較好。模擬音頻中對(duì)錄放磁頭等換能器要求高，如果有非線(xiàn)性原信號(hào)就會(huì)出現(xiàn)非線(xiàn)性。數(shù)字音頻中記錄信號(hào)和噪聲是兩種不同的東西，因此分開(kāi)不會(huì)引起噪聲，也不存在噪聲積累。模擬音頻中旋轉(zhuǎn)系統(tǒng)、驅(qū)動(dòng)系統(tǒng)等機(jī)構(gòu)動(dòng)作不穩(wěn)定就會(huì)引起信號(hào)抖晃，而數(shù)字音頻中在重放系統(tǒng)中時(shí)基校正電路的作用，不穩(wěn)定也不會(huì)引起抖晃，信號(hào)質(zhì)量大幅度提高。南京藝術(shù)學(xué)院音頻試題聲波可以在氣體中傳播，也可以在液體和固體中傳播，聲波又可成為彈性波。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京藝術(shù)學(xué)院音頻試題,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038572759296/5736462.png"></div><p style="text-indent:25px">音頻作曲家愛(ài)：經(jīng)常玩音樂(lè)的人應(yīng)該常聽(tīng)到MIDI（Musical Instrument Digital Interface）這個(gè)詞，MIDI允許數(shù)字合成器和其他設(shè)備交換數(shù)據(jù)。MID文件格式由MIDI繼承而來(lái)。MID文件并不是一段錄制好的聲音，而是記錄聲音的信息，然后在告訴聲卡如何再現(xiàn)音樂(lè)的一組指令。這樣一個(gè)MIDI文件每存1分鐘的音樂(lè)只用大約5～10KB?，F(xiàn)在，MID文件主要用于原始樂(lè)器作品，流行歌曲的業(yè)余表演，游戲音軌以及電子賀卡等。*.mid文件重放的效果完全依賴(lài)聲卡的檔次。*.mid格式的大用處是在電腦作曲領(lǐng)域。*.mid文件可以用作曲軟件寫(xiě)出，也可以通過(guò)聲卡的MIDI口把外接音序器演奏的樂(lè)曲輸入電腦里，制成*.mid文件。</p><p style="text-indent:25px">MP3格式誕生于八十年代的德國(guó)，所謂的MP3也就是指的是MPEG標(biāo)準(zhǔn)中的音頻部分，也就是MPEG音頻層。根據(jù)壓縮質(zhì)量和編碼處理的不同分為3層，分別對(duì)應(yīng)“*.mp1"/“*.mp2”/“*.mp3”這3種聲音文件。需要提醒大家注意的地方是：MPEG音頻文件的壓縮是一種有損壓縮，MPEG3音頻編碼具有10：1~12：1的高壓縮率，同時(shí)基本保持低音頻部分不失真，但是**了聲音文件中12KHz到16KHz高音頻這部分的質(zhì)量來(lái)?yè)Q取文件的尺寸，相同長(zhǎng)度的音樂(lè)文件，用*.mp3格式來(lái)儲(chǔ)存，一般只有*.wav文件的1/10，而音質(zhì)要次于CD格式或WAV格式的聲音文件。由于其文件尺寸小，音質(zhì)好；所以在它問(wèn)世之初還沒(méi)有什么別的音頻格式可以與之匹敵，因而為*.mp3格式的發(fā)展提供了良好的條件。直到現(xiàn)在，這種格式還是風(fēng)靡一時(shí)，作為主流音頻格式的地位難以被撼動(dòng)。但是樹(shù)大招風(fēng)，MP3音樂(lè)的版權(quán)問(wèn)題也一直是找不到辦法解決，因?yàn)镸P3沒(méi)有版權(quán)保護(hù)技術(shù)，說(shuō)白了也就是誰(shuí)都可以用。拾音器是一種把聲音信號(hào)轉(zhuǎn)換為電信號(hào)的換能器件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南京藝術(shù)學(xué)院音頻試題,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038631899944/1503649.png"></div><p style="text-indent:25px">CD格式：當(dāng)今世界上音質(zhì)好的音頻格式是什么？當(dāng)然是CD了。因此要講音頻格式，CD自然是打頭陣的先鋒。在大多數(shù)播放軟件的“打開(kāi)文件類(lèi)型”中，都可以看到*.cda格式，這就是CD音軌了。標(biāo)準(zhǔn)CD格式也就是44.1K的采樣頻率，速率88K/秒，16位量化位數(shù)，因?yàn)镃D音軌可以說(shuō)是近似無(wú)損的，因此它的聲音基本上是忠于原聲的，因此如果你如果是一個(gè)音響發(fā)燒友的話(huà)，CD是你的選擇。它會(huì)讓你感受到天籟之音。CD光盤(pán)可以在CD唱機(jī)中播放，也能用電腦里的各種播放軟件來(lái)重放。一個(gè)CD音頻文件是一個(gè)*.cda文件，這只是一個(gè)索引信息，并不是真正的包含聲音信息，所以不論CD音樂(lè)的長(zhǎng)短，在電腦上看到的“*.cda文件”都是44字節(jié)長(zhǎng)。注意：不能直接的復(fù)制CD格式的*.cda文件到硬盤(pán)上播放，需要使用象EAC這樣的抓音軌軟件把CD格式的文件轉(zhuǎn)換成WAV，這個(gè)轉(zhuǎn)換過(guò)程如果光盤(pán)驅(qū)動(dòng)器質(zhì)量過(guò)關(guān)而且EAC的參數(shù)設(shè)置得當(dāng)?shù)脑?huà)，可以說(shuō)是基本上無(wú)損抓音頻。推薦大家使用這種方法。數(shù)字音頻對(duì)信號(hào)的各種處理都可以變成值的運(yùn)算，因而數(shù)字音頻具有了模擬音頻相比強(qiáng)大的編輯工作。徐州南京藝術(shù)學(xué)院音頻經(jīng)驗(yàn)豐富</p><p style="text-indent:25px">音頻既不是單純的技術(shù)工作也不是單純的藝術(shù)工作，二者呈現(xiàn)為技術(shù)和藝術(shù)的各個(gè)方面融合趨勢(shì)。南京藝術(shù)學(xué)院音頻試題</p><p style="text-indent:25px">流動(dòng)旋律：RealAudio主要適用于在網(wǎng)絡(luò)上的在線(xiàn)音樂(lè)欣賞，大多數(shù)的用戶(hù)仍然在使用56Kbps或更低速率的Modem，所以典型的回放并非好的音質(zhì)。有的下載站點(diǎn)會(huì)提示你根據(jù)你的Modem速率選擇佳的Real文件。real的的文件格式主要有這么幾種：有RA（RealAudio）、RM（RealMedia，RealAudio G2）、RMX（RealAudio Secured），還有更多。這些格式的特點(diǎn)是可以隨網(wǎng)絡(luò)帶寬的不同而改變聲音的質(zhì)量，在保證大多數(shù)人聽(tīng)到流暢聲音的前提下，令帶寬較富裕的聽(tīng)眾獲得較好的音質(zhì)。隨著網(wǎng)絡(luò)帶寬的普遍改善，Real公司正推出用于網(wǎng)絡(luò)廣播的、達(dá)到CD音質(zhì)的格式。如果你的RealPlayer軟件不能處理這種格式，它就會(huì)提醒你下載一個(gè)**的升級(jí)包。許多音樂(lè)網(wǎng)站提供了歌曲的Real格式的試聽(tīng)版本?，F(xiàn)在新的版本是RealPlayer 11。南京藝術(shù)學(xué)院音頻試題</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2967800.html</p></div></div></div></div></div><div id="37l8fhe" class="page-right twoColRt"><div id="xr8nfr2" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hw7ipbt" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img 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