Cable television system having dynamic market code shuffling Patent #: 5231665
ApplicationNo. 352162 filed on 12/01/1994
US Classes:725/29, Time dependent (e.g., time spent viewing program, time of day, etc.)725/143, VIDEO DISTRIBUTION SYSTEM COMPONENTS725/152Programmable or upgradeable
ExaminersPrimary: Peng, John K.
Assistant: Miller, John
Attorney, Agent or Firm
International ClassesH04N 007/10
AbstractA communications system for the delivery of digital data programs to a remote location includes a transmitter for transmitting a signal having the digital data programs and a communications terminal located at the remote location. The communications terminal includes a control circuit including authorizing circuitry responsive to authorization data for authorizing the communications terminal to access authorized ones of the digital data programs in one of a first and a second authorization mode. For example, automatic authorization modes for game play may comprise an arcade mode and a rental mode, simulating manual access methods i.e. paying for play at a video arcade or for rental of games from a video game store. Moreover, new games may be accessed without charge by the game player if authorized according to a free service authorization map. Furthermore, parents may limits game play to children prior to a particular time of day such as bed-time or to a maximum playtime limit according to a secret downloadbale password known only to the parents. A game player may only read and not write authorization and control data.