DYNAMIC OPTIMIZATION OF WIRELESS REAL-TIME VIDEO DATA FLOW

摘要

Quality of service management for video streaming applications is an important issue for wireless mobile devices, such as for upload or download of video data between personal digital assistants (PDAs) or 3G cellular phones, and a wireless communication network. The invention discloses a method for dynamically adapting a video stream during the transmission. The adaptation is mainly based on a prediction of the future state of the data flow. According to the predictions, a decider module decides on a method (116, 118, 120, 122, 124) for either adapting the encoding of the video data or for adapting the transmission of these data, depending on the kind of frame to be transmitted. By using this quality of service management, the mobile system can react to changes in the quality of the wireless link at an early stage and, thus, greatly improve the quality video data transmission.