公开(公告)号：US20200021633A1

公开(公告)日：2020-01-16

申请号：US16230930

申请日：2018-12-21

Applicant: Apple Inc.

Inventor： SHOICHIRO SENGOKU ,  Anup K. Sharma ,  Andrew Kenneth John McMahon

IPC: H04L29/06 ,  G06F13/16 ,  G06F13/42

Abstract: Methods and apparatus for converting streaming media between different formats. A bridging device for e.g., Camera Serial Interface (CSI) and DisplayPort is disclosed. Both the CSI and DisplayPort technologies use low power mode operation during blanking intervals of a video transmission. However, the CSI interface can wake up in a very short amount of time (e.g., ˜400 ns), but the DisplayPort interface takes significantly longer to perform link training (e.g., ˜1 ms). Various embodiments of the present disclosure use frame signaling trigger to start a wait time interval timer; the wait time interval can be used by the bridge device to wake up the DisplayPort interface ahead of the CSI2 D-PHY interface, thereby ensuring that both links are active at the same time. This “wake-up” technique can greatly reduce the size of buffering memories that are required.