Multiple channel maps are embedded in a television transmission and the appropriate channel map (68) corresponding to the particular television service used by the viewer is downloaded for use with the television receiver. Each channel map (68) is accompanied by a channel map identifier (66) which identifies...http://www.google.com.tw/patents/US6252634?utm_source=gb-gplus-share專利 US6252634 - Method and apparatus for transmitting and downloading setup information
