METHOD AND APPARATUS FOR USING A SINGLE PASSWORD SET IN AN INTEGRATED TELEVISION SYSTEM

Abstract: A method and apparatus for controlling access to programming that is available from multiple programming sources. One embodiment is an integrated terrestrial and satellite television system having a single password set such that a user can enter a single password to activate both satellite and terrestrial television components of the system.

Description: METHOD AND APPARATUS FOR USING A SINGLE PASSWORD SET IN AN INTEGRATED TELEVISION SYSTEM FIELD OF THE INVENTION The invention generally relates to a television receiver system. More particularly, the invention relates to password utilization in a television system capable of receiving signals from multiple sources. DESCRIPTION OF THE PRIOR ART Traditionally, television viewers have used over-the-air or cable television (terrestrial television) as their primary source of programming. With the emergence of the widespread use of a V-chip and other digital television technologies that control access to programming, many terrestrial television systems are using passwords to limit the access to particular channels or to make service purchases (e.g., pay per view movies) . In addition, some television viewers use satellite television systems to obtain various programs or channels from a satellite television provider. Most satellite television systems utilize passwords for limiting the access to various content material and services. The access level is defined by the level of services to which a viewer has subscribed. To store passwords and facilitate access to the satellite television system, these satellite television systems comprise a satellite set top box (STB) having a smart card interface and an access card, i.e., a smart card. The passwords are used for limiting access to channel viewing lists, purchasing limits on pay per view data, viewing hours and ratings exception handling. In many instances, a television viewer has the capability, through separate systems, to receive both terrestrial and satellite television programming. As such, the viewer that owns a television comprising a V-chip and subscribes to satellite programs is required to use separate satellite system and terrestrial system passwords for accessing the respective satellite and terrestrial television programming. This dual password utilization is not consumer friendly. Therefore, there is a need for dynamically linking the satellite and terrestrial password systems such that only the passwords from one of these television systems are utilized to enable access to both systems. SUMMARY OF THE INVENTION The invention provides a method and apparatus for enabling conditional access to programming that is available from multiple sources of programming. One embodiment of the invention is an integrated terrestrial and satellite television system having a single password set such that a user can enter a single password to activate both satellite and terrestrial television components of the system. The integrated television system comprises both a terrestrial television receiver and a satellite television receiver. The terrestrial television receiver utilizes password access (terrestrial passwords) to programming in accordance with the use of a V-chip and the satellite receiver utilizes password access to satellite programming (satellite passwords). The integrated password access is facilitated by a smart card and smart card interface. When no smart card is used or an incorrect smart card is used, the integrated system defaults to using the terrestrial television passwords to access terrestrial programming and no access to satellite programming are permitted. When a correct smart card is inserted into the integrated system, the master password of satellite television system overwrites the terrestrial password. As such, a single master password is now used to access both terrestrial television programming and satellite television programming. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 depicts a high-level block diagram of an integrated television system; FIG. 2A depicts a password set of the satellite television system; FIG. 2B depicts a password set of the terrestrial television system; and FIG. 3 depicts a flow chart of a routine for implementing a single password system. To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. DETAILED DESCRIPTION FIG. 1 depicts a high-level block diagram of an integrated television system 1 00 that is capable of receiving television signals from a plurality of sources. The integrated television system 1 00 comprises an integrated receiver 1 02 for receiving and processing both terrestrial television signals and satellite television signals. As such, the system 100 receives signals from both a satellite antenna 106 and a terrestrial antenna 1 04. The signals from the antennas 1 06 and 1 04 are separately processed respectively by a satellite television receiver 1 1 0 and a terrestrial television receiver 108. The received signals from either source are displayed on a monitor 1 24 that may be "built-in" to the system 100 or may be a separate device. If the monitor 1 24 is a separate device, then the integrated system 1 00 is generally referred to as a "set top box". The system 100 uses a single programming access process to facilitate selective access to programming from both the satellite television receiver 1 10 and a terrestrial television receiver 108. Programming display is controlled by the computer 1 1 2 interacting with a smart card interface 1 20 and a smart card 1 22. The computer 1 1 2 (a smart card interface controller) comprises a central processing unit (CPU) 1 14, a memory 1 1 6 and support circuits 1 1 8. The CPU 1 1 4 is conventionally supported by the memory 1 1 6 and the support circuits 1 1 8. The support circuits 1 1 8 are well known in the computer art as clocks, power supplies, cache, and the like. The memory 1 1 6 may be random access memory (RAM) and/or read only memory (ROM) . In the context of password access, the smart card 1 22 comprises ROM 1 28 for storing passwords that are used in programming access. The passwords in ROM 1 28 are copied to RAM 1 1 6 within the computer 1 1 2 when the card is inserted into the interface 1 20. When the integrated television system 1 00 is shipped from the factory, a smart card is shipped with the system. To facilitate activation of a satellite television service, the card is "paired" with the integrated system 1 00. To pair the card, the card is inserted into the interface and a signal is sent to the system via a satellite transmission. A unique serial number is then written to the ROM 1 28 in the card 1 22 to match a serial number for the integrated system 100 such that the paired card only operates with that particular system. Each of the satellite and terrestrial television receivers 1 1 0 and 1 08 utilize separate passwords or "password sets. " At any given time, the system 1 00 may utilize the password set of either the satellite or terrestrial television receivers 1 08 and 1 1 0. In one embodiment of the invention, the satellite television password access process overrides the password access process of the television receiver to allow a single password to control both the terrestrial and satellite programming access. The television receiver 1 08 includes hardware that controls television programming access. One example of such hardware is a V-chip controller 1 26 but could also include other forms of conditional access such as cable television descrambling privileges. The V-chip controller 1 26 enables terrestrial programming access with respect to one or more user profiles or accounts. Each of these user profiles or accounts contain passwords (terrestrial passwords) for enabling access to particular content level of programming, for example, PG-1 3 rated channels or programs. The terrestrial passwords that control access to programming using the V- chip controller 1 26 are stored within the television read only memory (ROM) 1 30 and are written to random access memory (RAM) 1 32 upon the television being activated. Alternatively, the television may utilize a smart card for storing the terrestrial passwords that are then written to the television's RAM upon insertion of the smart card into the television. These terrestrial passwords are used whenever a satellite smart card is not inserted into the system 100. Upon receiving a terrestrial password for a corresponding user profile, the controller enables the integrated receiver 102 to display the terrestrial programming that is enabled under that particular user profile. The integrated receiver 1 02 includes an interface 1 20 for receiving an access card or smart card 1 22. The smart card 1 22 comprises a system specific code (system serial number) to activate a particular system 100 i.e., for discussion, the card is assumed to be paired with the system 1 00. As such, the satellite receiver portion of the system 100 operates only after a paired smart card 1 10 is inserted into the interface 1 20. Upon receipt of the smart card 1 1 0 and the user's entering a correct password, the satellite receiver 1 1 0 descrambles or enables the receipt of particular content via the satellite antenna 1 06. The satellite receiver 1 1 0 is coupled to the monitor 1 24 for presenting the received content to a viewer. The user profiles can be displayed on the monitor 1 24 as sub-screens to enable a user that enters a master password to initialize other user passwords. For example, a high definition television (HDTV) integrated system may have five user profiles, which includes one master profile and four sub-profiles. Each of the user profiles may have separate passwords. These passwords are cumulatively referred to as a password set. The terrestrial password profiles are stored in the ROM 1 30 while the satellite passwords are stored in the ROM 1 28. Restrictions on the sub-profiles for both terrestrial and satellite access are generally defined after entering the master password. Such restrictions may include access to limited channel viewing lists, purchase limits on pay per view material, limits on viewing hours and restrictions on material above a certain rating limit. In addition, the sub-profiles are optionally locked through the master profile. As such, each sub-profile includes a separate password and is defined or restricted through the master profile. FIG. 2A depicts a password set 200 for the satellite television receiver 1 1 0. The password set 200 comprises a master password 202 and four sub- profile passwords 204, , 204 2 , 204 3 and 204 4 . Although four sub-profile passwords are depicted, the password set 200 may comprise any number of sub-profiles. FIG. 2B depicts a password set 250 of the terrestrial television receiver 108 e.g., passwords for the V-chip controller 1 26. As with the password set 200, the password set 250 may comprise a master password 252 and four sub-profile passwords 254 v 254 2 , 254 3 and 254 4 . The password set 200 of the satellite receiver may have a different number of sub-passwords than the password set 250 of the terrestrial receiver. However, as described below, the integrated television system 1 00 of the present invention utilizes only one of these password sets 200 and 250 at any given time. FIG. 3 depicts a flow diagram of a routine 300 for implementing a single password system as embodied in the invention. The integrated system 1 00 may include a software module or program stored in memory 1 1 6 that when executed by CPU 1 14 implements routine 300. As both the satellite and terrestrial television receivers have passwords, the routine 300 uses only one of the password sets 200 and 250 associated with one of these television receivers. If the correct (paired) smart card 1 22 is inserted in interface 1 20, then the routine 300 uses the satellite receiver passwords 200 for both satellite and terrestrial television programming access. If the smart card 1 22 is not inserted in the interface 1 20 or an inactive (unpaired) card is inserted, then the routine 300 uses the terrestrial receiver passwords 250 in a conventional manner to provide terrestrial programming only to a viewer. After the routine 300 starts at step 302, the routine 300 proceeds to step 304, to determine whether the smart card 1 22 is inserted into the interface 1 20. If the smart card 1 22 is not inserted, then the routine 300 proceeds to step 306. Alternatively, if the smart card 1 22 is inserted into the interface 1 20, then the routine 300 proceeds to step 308. At step 306, the routine 300 uses the terrestrial television receiver passwords 250 in a conventional manner to permit access to terrestrial programming using a V-chip. In this case, the routine 300 precludes the use of the satellite passwords 200. However, if the system 100 receives the smart card 1 22 at a later time, then the routine 300 starts over at step 302. At step 308, the routine 300 determines whether the smart card 1 22 is "paired" to the system 100, i.e., does the card serial number match the system serial number. If the smart card 1 22 is not paired to the system 1 00, the routine 300 proceeds to step 306. As such, the routine 300 precludes use of the satellite passwords 200 on that system 1 00. On the other hand, if the smart card 1 22 is paired to the system 100, the routine 300 proceeds to step 31 0. At step 310, the routine 300 synchronizes and/or links the satellite passwords 200 to the terrestrial passwords 250. Synchronization is performed by writing the satellite passwords over the terrestrial passwords in RAM 1 1 6. As such, the user can enter a satellite password to access both the terrestrial and satellite programming. The routine 300 proceeds to step 312, where the routine 300 uses the satellite system passwords 200 for all programming access as well as sub-profile alteration. Consequently, the present invention provides a method for simplifying a viewer's access to television programming that programming arrives from various password controlled sources. Although various embodiments which incorporate the teachings of the present invention have been shown and described in detail herein, those skilled in the art can readily devise many other varied embodiments that still incorporate these teachings.

Claims: What is claimed is: 1 . Apparatus for integrating passwords for accessing programming from multiple sources, the apparatus comprising: a memory for storing a first password associated with a first source of programming; removable memory for storing a second password associated with a second source of programming; temporary memory for temporarily storing said first password during use; and means for replacing said first password in said temporary storage with said second password to enable said second password to allow access to programming from said first and second sources. 2. The apparatus of claim 1 wherein the first and second password each comprise a master password. 3. The apparatus of claim 2 wherein said first password and second password each further comprises a sub-profile password. 4. The apparatus of claim 1 wherein said removable memory is a smart card. 5. A method for integrating passwords for accessing multiple sources of programming in an integrated television system, the method comprising: processing a first password if the integrated television system receives an access card containing said first password, where said first password enables access to said multiple sources of programming; and processing a second password if the integrated television system fails to receive the access card. 6. The method of claim 4 wherein each of the first and second passwords each comprises a master password. 7. The method of claim 6 wherein at least one of the first and second passwords further comprises a sub-profile password. 8. The method of claim 5 further comprising writing said second password to temporary storage for use when an access card is not received; and overwriting said second password in temporary storage with said first password when said access card is received. 9. The method of claim 5 further comprising validating said access card before using said first password.

Inventors: DINWIDDIE AARON HAL, LYNCH DAVID JOHNSTON, DINWIDDIE, AARON, HAL, LYNCH, DAVID, JOHNSTON
Applicants: DINWIDDIE AARON HAL, LYNCH DAVID JOHNSTON, THOMSON LICENSING SA, DINWIDDIE, AARON, HAL, LYNCH, DAVID, JOHNSTON, THOMSON LICENSING S.A.
Application year: 2000
Main classification: H04N7
IPC codes: G06K17, H04H1, H04L9, H04N5, H04N7