An encoding method includes: extracting core layer characteristic parameters and enhancement layer characteristic parameters of a background noise signal, encoding the core layer characteristic parameters and enhancement layer characteristic parameters to obtain a core layer codestream and an enhancement layer codestream. A vehicle control application effects changes in vehicle performance aspects based on the recognized driving environment. The electrowetting device is an electrowetting display in which each of a pair of substrate constituting one cell has a driving unit. The extended object model can be used to generate an equivalent package or feature manifest XML file. The operating system is connected with the internet and a central processing center to allow for complete managing and monitoring of the system.