Seat end program cache updates for inflight entertainment system
View Patent ↗An inflight entertainment system and method for use therein reduce the loading time required to preload programs identified in playlists onto seat end equipment. Loading time is reduced by retaining programs included in playlists on seat end equipment across flights and making incremental updates to such programs to account for changes in playlists, rather than updating them wholesale for each flight. Loading time is further reduced by adding programs to seat end equipment for the current flight, where possible, by copying such programs from other seat end equipment, rather than copying them from head end equipment.
1. A method for updating seat end inflight entertainment system program caches, comprising:
generating current flight playlists for individual passenger seats;
selecting a prerecorded program;
identifying the seats whose current flight playlists include the program but which do not have the program stored from a previous flight;
generating a seat-to-seat copy sequence for copying the program in sequence to the seats whose current flight playlists include the program but which do not have the program stored from a previous flight;
wherein the generating step comprises:
identifying an optimum sequence for copying the program from ones of the seats which have the program stored to ones of the seats whose current flight playlists include the program but which do not have the program stored; and
executing the copy sequence whereby the program is copied in sequence from ones of the seats which have the program stored to ones of the seats whose current flight playlists include the program but which do not have the program stored.
2. The method of claim 1 , further comprising:
identifying on head end equipment seats which have the program stored from a previous flight;
generating on the head end equipment the copy sequence; and
downloading the copy sequence from the head end equipment to one of the seats having the program stored from a previous flight, whereupon the one of the seats identifies using the copy sequence a first one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight and copies the program to the first one of the seats.
3. The method of claim 1 , further comprising:
generating on head end equipment the copy sequence; and
downloading the program and the copy sequence from the head end equipment to a first one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight, whereupon the first one of the seats identifies using the copy sequence a second one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight and copies the program to the second one of the seats.
4. The method of claim 1 , further comprising:
identifying seats whose current flight playlists do not include the program but which have the program stored from a previous flight; and
removing the program from the seats whose current flight playlists do not include the program but which have the program stored from a previous flight.
5. The method of claim 4 , wherein the removing step comprises:
generating on head end equipment a delete instruction; and
downloading the delete instruction from the head end equipment to one of the seats whose current flight playlist does not include the program but which has the program stored from a previous flight, whereupon the one of the seats executes the delete instruction and removes the program from the one of the seats.
6. The method of claim 1 , wherein the seats are associated with seatback video display units having program caches for storing programs included in current flight playlists for the seats.
7. The method of claim 1 , wherein the current flight playlists are generated using program popularity data.
8. The method of claim 1 , wherein the current flight playlists are generated using passenger demographic data.
9. The method of claim 1 , wherein the current flight playlists are generated using passenger preference data.
10. An inflight entertainment system, comprising:
head end equipment configured to generate current flight playlists for individual passenger seats, select a prerecorded program stored on the head end equipment, identify seats whose current flight playlists include the program but which do not have the program stored from a previous flight and generate a seat-to-seat copy sequence for copying the program in sequence to the seats whose current flight playlists include the program but which do not have the program stored from a previous flight, wherein the head end equipment is further configured to identify an optimum sequence for copying the program from ones of the seats which have the program stored to ones of the seats whose current flight playlists include the program but which do not have the program stored; and
seat end equipment communicatively coupled with the head end equipment and configured to execute the copy sequence whereby the program is copied in sequence from ones of the seats which have the program stored to ones of the seats whose current flight playlists include the program but which do not have the program stored.
11. The system of claim 10 , wherein the head end equipment is further configured to identify the seats which have the program stored from a previous flight and download the copy sequence to one of the seats having the program stored from a previous flight, whereupon the one of the seats having the program stored from a previous flight is configured to identify using the copy sequence a first one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight and copy the program to the first one of the seats.
12. The system of claim 10 , wherein the head end equipment is further configured to download the program and the copy sequence to a first one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight, whereupon the first one of the seats is configured to identify using the copy sequence a second one of the seats whose current flight playlist includes the program but which does not have the program stored from a previous flight and copy the program to the second one of the seats.
13. The system of claim 10 , wherein the head end equipment is further configured to identify the seats whose current flight playlists do not include the program but which have the program stored from a previous flight and remove the program from the seats whose current flight playlists do not include the program but which have the program stored from a previous flight.
14. The system of claim 13 , wherein the head end equipment is further configured to generate a delete instruction and download the delete instruction to one of the seats whose current flight playlist does not include the program but which has the program stored from a previous flight, whereupon the one of the seats executes the delete instruction and removes the program from the one of the seats.
15. The system of claim 10 , wherein the seats are associated with seatback video display units having program caches for storing programs included in current flight playlists for the seats.
16. The system of claim 10 , wherein the current flight playlists are generated using program popularity data.
17. The system of claim 10 , wherein the current flight playlists are generated using passenger demographic data.
18. The system of claim 10 , wherein the current flight playlists are generated using passenger preference data.