發(fā)布時(shí)間：2018-04-30 04:12

  本文選題：音頻配件 + Android��； 參考：《東北大學(xué)》2014年碩士論文

【摘要】：隨著Android開放配件協(xié)議的開放,Android設(shè)備可以方便的訪問(wèn)外設(shè),形成強(qiáng)大的Android配件系統(tǒng)。由于Android音頻配件越來(lái)越受到消費(fèi)者的青睞,Android開放配件(AOA, Android Open Accessory)協(xié)議專門為音頻配件開發(fā)提供支持。本課題主要通過(guò)對(duì)AOA協(xié)議與音頻配件技術(shù)的研究,提出了一種新的Android音頻配件解決方案。AOA協(xié)議規(guī)定Android設(shè)備可以通過(guò)USB接口與配件通信,實(shí)現(xiàn)AOA協(xié)議的配件均可實(shí)現(xiàn)Android設(shè)備的訪問(wèn)。本課題通過(guò)對(duì)AOA協(xié)議核心內(nèi)容、主要技術(shù)以及應(yīng)用場(chǎng)景的研究,結(jié)合音頻配件的需求,設(shè)計(jì)并實(shí)現(xiàn)了通過(guò)USB進(jìn)行Android設(shè)備與音頻配件間的音頻傳輸功能。此外,本課題通過(guò)對(duì)藍(lán)牙技術(shù)、USB大容量存儲(chǔ)協(xié)議以及SD協(xié)議的研究,設(shè)計(jì)實(shí)現(xiàn)藍(lán)牙、U盤與SD卡音頻播放功能。對(duì)于音頻配件來(lái)講,AOA音頻、藍(lán)牙音頻、U盤音頻和SD卡音頻構(gòu)成了四種音頻數(shù)據(jù)源,音頻配件通過(guò)對(duì)不同數(shù)字音頻源數(shù)據(jù)解碼,將解碼后的音頻數(shù)據(jù)輸送到集成的高品質(zhì)聲卡。根據(jù)音頻源不同,音頻配件包含四種播放模式：AOA模式、藍(lán)牙模式、U盤模式以及SD卡模式。本課題為每種模式設(shè)定了優(yōu)先級(jí),實(shí)現(xiàn)了多種音頻源就緒情況下的音頻源選擇。通過(guò)對(duì)本課題軟硬件開發(fā)平臺(tái)需求分析以及對(duì)多家廠商軟硬件開發(fā)平臺(tái)對(duì)比,最終選用飛思卡爾公司Kinetis系列K70高性能MCU進(jìn)行配件開發(fā),選取SGTL 5000實(shí)現(xiàn)音頻輸出。本課題音頻配件引入AOA協(xié)議支持,實(shí)現(xiàn)了一種新的數(shù)字音頻傳輸方式,打破了市面上音頻配件只支持藍(lán)牙無(wú)線連接以及存儲(chǔ)卡本地播放的局面。本課題涉及的關(guān)鍵技術(shù)有Android開放配件協(xié)議、藍(lán)牙高級(jí)音頻傳輸協(xié)議、USB大容量存儲(chǔ)協(xié)議以及SD協(xié)議等。
[Abstract]:With the opening of Android Open Accessories Protocol, Android devices can easily access peripherals and form a powerful Android accessory system. Because Android audio accessories are becoming more and more popular among consumers, Android Open Accessory is dedicated to support audio accessories development. Based on the research of AOA protocol and audio accessory technology, this paper proposes a new Android audio accessory solution. AOA protocol stipulates that Android equipment can communicate with accessories through USB interface. The accessories that realize AOA protocol can realize the access of Android device. Through the research of the core content, main technology and application scene of AOA protocol, combining with the requirement of audio accessories, this paper designs and realizes the audio transmission function between Android equipment and audio accessories through USB. In addition, through the research of Bluetooth technology, USB mass storage protocol and SD protocol, the audio playback function of Bluetooth, U disk and SD card is designed and realized. For audio accessories, AOA audio, Bluetooth audio, U disk audio and SD card audio constitute four kinds of audio data sources. Audio accessories transmit the decoded audio data to integrated high quality sound card by decoding different digital audio source data. Depending on the audio source, the audio accessory includes four playback modes: AOA mode, Bluetooth mode, U disk mode, and SD card mode. In this paper, priority is set for each mode, and audio source selection is realized when many audio sources are ready. By analyzing the requirement of the software and hardware development platform and comparing the software and hardware development platform of many manufacturers, the author chooses Kinetis K70 high performance MCU of Freescale Company to carry on the accessory development, and selects the SGTL 5000 to realize the audio output. In this paper, AOA protocol is introduced into audio accessories to realize a new digital audio transmission mode, which breaks the situation that audio accessories only support Bluetooth wireless connection and local playback of memory card. The key technologies involved in this thesis include Android Open Accessories Protocol, Bluetooth Advanced Audio transfer Protocol, USB Mass Storage Protocol, SD Protocol and so on.
【學(xué)位授予單位】：東北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TP316;TN915.04

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本文編號(hào)：1823010