Method of coding and transmitting EPG data, coder and receiver
View Patent ↗EPG data regarding programs and their scheduled times are structured and/or transmitted in such a way that program and schedule records are interleaved. This scheme allows better handling by receiving devices such as embedded devices (i.e. LCD remote controls), because a more efficient reception and storage of transmitted data is possible. In particular, the receiving device can read, parse and store the downloaded EPG data on the fly as it is being received (it can start reading, parsing and storing before the complete reception of data id finished). At any time when the device would have to stop storing EPG data into persistent storage, (almost) all of the data that was stored can actually be used.
1. A method of coding and/or transmitting EPG (electronic program guide) data, the data comprising:
a plurality of program records, each program record identifying one program;
a plurality of schedule records, each schedule record identifying one or more specific scheduled broadcast times of one program,
the program records and the schedule records being coded and/or transmitted in an interleaved manner such that two successive program records are separated by one or more schedule records associated with one of the two successive program records;
wherein each program record and all of the schedule records for that program record are transmitted prior to the next program record being transmitted; and
once transmitted, at a receiving device comprising a processor and a memory, the received EPG data is read, parsed and stored in the memory as it is being received and prior to the complete reception of all of the data for the EPG.
2. A method as claimed in claim 1 , characterized in that the interleaved program records and schedule records are sorted on a time basis.
3. A method as claimed in claim 1 , characterized in that schedule records refer to program records that are ahead in the coding scheme.
4. A method as claimed in claim 1 , characterized in that the interleaved program records and schedule records are coded in a section, which is separate and ahead in the coding scheme from other sections comprising information relating to the programs.
5. A method as claimed in claim 4 , characterized in that the section, which comprises interleaved program records and schedule records, is preceded by a section comprising general information.
6. A device comprising an encoder for coding EPG data comprising program records and schedule records in accordance with the method as claimed in claim 1 .
7. A receiving device (RC) comprising a decoder for decoding EPG data comprising program records and schedule records coded in accordance with the method as claimed in claim 1 .
8. The method according to claim 1 , wherein upon storing in memory, substantially all stored EPG data is complete for both program records and schedule records.
9. A method for transmitting EPG (electronic program guide) data to a receiving device comprising:
transmitting EPG data comprising a plurality of program records and a plurality of schedule records in an interleaved manner, each of the plurality of program records identifying one program and each of the plurality of schedule records identifying one or more specific scheduled broadcast times of one program, wherein the program records and schedule records are interleaved such that two successive program records are separated by one or more schedule records associated with one of the two successive program records, and
transmitting the EPG data to a receiving device comprising a processor and a memory, wherein each program record and its associated schedule records are transmitted prior to the next program and its associated schedule records being transmitted such that each program record and its associated schedule records are received at the receiving device before the next program record is received and the EPG data for each program is read, parsed and stored in the memory as it is being received before the complete reception of all EPG data.