DATA CAROUSEL DELIVERY

摘要

A method is described for updating electronic program guide (EPG) data in a system including a plurality of transponders, at least one of the transponders being at least partially dedicated to broadcasting EPG data and at least one of the transponders not being dedicated to broadcasting EPG data, the method including receiving a broadcast stream, the broadcast stream including a data carousel, the data carousel including a plurality of data containers sent from a transponder not dedicated to broadcasting EPG data, each individual data container of the plurality of data containers including updates to the EPG data, downloading each of the data containers included in the data carousel, extracting the updates to the EPG data from each downloaded data container, and updating a cache of EPG data according to the extracted updates to the EPG data. Related methods and apparatus are also described.