SYSTEM AND METHOD FOR TRANSMITTING LAYERED VIDEO OVER QOS ENABLED WLANS

摘要

A system and method is disclosed for the transmission of layered video over Quality of Service (QoS) enabled wireless local area networks (WLANs) in which a flow control layer (614) is utilized to drop enhancement layer (EL) packets from a multi-layer variable rate (VR) video stream having both base layer (BL) packets (608) and enhancement layer (EL) packets (610) when a wireless network becomes congested. An exemplary system includes an encoder (602) suitable to receive and encode video data into a video bitstream comprising both base layer BL packets (608) and enhancement layer EL packets (610), a flow control layer (612) whereby one or more of the enhancement layer EL packets (610) associated with the video stream may be dropped as needed depending upon the state of a wireless medium, a scheduler (SE) (614) for scheduling the packets, and a MAC layer (616) for preparing the video stream for transmission over the air.