Patent ID: 7254826
Filing Date: 2007-08-07
Classification: H04H,H04N

Abstract:
1. A broadcast apparatus for multiplexing and broadcasting program data which is to be reproduced by a reception apparatus soon after receipt and additional data which corresponds to the program data, the broadcast apparatus comprising: acquiring means for acquiring first program data, a first additional data group including at least first additional data corresponding to the first program data, a broadcast time period of the first program data, and second program data which is to be broadcast before the first program data; multiplexing means for repeatedly multiplexing the first additional data group with the second program data from a specific time to a start of the broadcast time period and repeatedly multiplexing the first additional data group with the first program data during the broadcast time period, the specific time being a point in time before the start of the broadcast time period, and a time period between the specific time and the start of the broadcast time period being a predetermined time period; broadcasting means for broadcasting the data multiplexed by the multiplexing means; cache instruction broadcasting means for broadcasting a cache instruction before the start of the reproduction time period, the cache instruction instructing the reception apparatus to cache only the first additional data; and use instruction broadcasting means for broadcasting a use instruction after the start of the reproduction time period, the use instruction instructing the reception apparatus to use, when the first additional data has been cached according to the cache instruction, the cached additional data.