在嵌入式Linux 平臺上開發(fā)USB OTG 控制器工作在外設(shè)模式時(shí)傳輸實(shí)時(shí)音視頻流的
應(yīng)用程序和USB Gadget驅(qū)動(dòng)程序,目標(biāo)是實(shí)現(xiàn)壓縮視頻流和原始音頻流從USB OTG 設(shè)備到
USB主機(jī)的實(shí)時(shí)傳輸。測試結(jié)果表明設(shè)計(jì)能夠滿足實(shí)時(shí)傳輸要求，音視頻帶寬可達(dá)
1000Kbit/s。若進(jìn)一步改進(jìn)設(shè)計(jì)，傳輸帶寬仍有巨大的提升空間。
關(guān)鍵詞: 嵌入式系統(tǒng); USB Gadget 驅(qū)動(dòng)；音視頻

Abstract: Develop application and USB Gadget driver to transmit real-time audio and
video on embedded Linux platform when USB OTG controller worked in device mode. The
aim is real-time compressed video and raw audio transmission which from USB OTG
device to USB host. The experimentation shows that the design can satisfy the aim.
Transmission bandwidth can up to 1000Kbit/s. With the further improvement of the
design, the transmission bandwidth is still tremendous room for improvement.
Key words: embedded system; USB Gadget driver; audio video;