A communications system provides a media sender object and a media receiver object that provide an interface between a media stack and an application. The application can use the media sender object to send content to a source media stack and the media receiver object to receive content from a sink media...http://www.google.com.tw/patents/US7716359?utm_source=gb-gplus-share專利 US7716359 - Method and system for providing an interface through which an application can access a media stack
