A graphic interface device and method in a digital TV. The graphic interface device includes: a transmitting side for coding various forms of user graphic environment which can be selected by an end user, assigning specific packet identification (PID), and multiplexing the assigned PID with video information,...http://www.google.com.hk/patents/US6618057?utm_source=gb-gplus-share專利 US6618057 - Graphic interface device and method in digital TV
