UIBC 是指 User Input Back Channel, 用在 WIFI Display 的情境之下. 由於顯示裝置 (AV sink device) 和發送裝置 (AV source device) 只能透過無線傳輸, 所以從顯示裝置反過來操作發送裝置的話, 就叫做 UIBC.
上圖中的示意圖, 左邊的 310 可以換成平板或是手機 (410), 右邊可以換成筆電 (420). 不過手機一定是拿在手上, 自己控制自己就好啦！哪需要用到 UIBC？非也! Samsung 申請了個討厭的專利, 連筆電控制手機都納入了專利的範圍, 還好它在 2010/11/2 申請到現在還沒過.
這個專利的摘要說：A method and apparatus for providing a user input back channel (UIBC) in an audio/video (AV) source device and an AV sink device communicating according to a wireless fidelity (Wi-Fi) display (WFD) standard is provided. The method includes: setting up an AV control session and an AV data session between the AV source devices according to the WFD standards; enabling the UIBC from the AV sink device to the AV source device by using the AV control session; and transmitting a user input from the AV sink device to the AV source device through the UIBC.
讓我們拭目以待, 看看拿了 20 個美國專利的 LEE; Jae-min, 和 11 個專利的 NA; Il-ju 這次是否能夠得逞.
Cash Chou's Blog 