Channel hopping scheme for update of data for multiple services across multiple digital broadcast channels
View Patent ↗Data broadcast over different channels may be updated in a digital broadcast receiving device. The device may include a receiver unit, a processor, memory instructions embodied in the memory for execution on the processor. The instructions may be configured to implement the method for updating data broadcast over different channels. A first digital broadcast signal may be received over a first channel. The receiving device may be tuned to a second channel at a predetermined time to receive a second digital broadcast signal. Selected data may be extracted from the second digital broadcast signal and stored or utilized with the receiving device. An update schedule may be generated for data transmitted with a digital broadcast signal. A broadcast time for an update packet may be determined from a packet header. A schedule packet may be generated containing the broadcast time and broadcast before the update packet.
1. A method for generating an update schedule for data transmitted with a digital broadcast signal, comprising:
a) receiving one or more input data streams containing data for one or more digital broadcast data services, wherein the data is in the form of a plurality of packets, each packet having a header and a payload, wherein the header includes information identifying a broadcast channel and a number of related downstream packets;
b) determining from the headers of the plurality of packets a time that an update packet containing data for one of the digital broadcast data services will be broadcast as part of the digital broadcast signal;
c) generating a schedule packet containing the time that the update packet will be broadcast as part of the digital broadcast signal; and
d) broadcasting the schedule packet before broadcasting the update packet as part of the digital broadcast signal.
2. The method of claim 1 , wherein the header includes information identifying a channel over which the packet associated with the header is to be broadcast.
3. The method of claim 1 , wherein the header includes information identifying a type of data in the payload.
4. The method of claim 1 wherein the header includes information identifying a size of the packet.
5. The method of claim 1 wherein the header includes information identifying a given packet as being associated with other packets in the digital broadcast signal.
6. The method of claim 1 wherein the schedule packet includes update times for update packets that are to be transmitted over different digital broadcast channels.
7. The method of claim 1 wherein the schedule packet includes information relating to a broadcast time for one or more other schedule packets.
8. The method of claim 1 wherein the schedule packet includes information relating to a duty cycle with which schedule packets are broadcast.