CHANNEL TAPPING IN A NEAR- VIDEO-ON-DEMAND SYSTEM

摘要

In a broadcast system 100 a broadcasting device broadcasts titles using a near-video-on-demand broadcasting protocol. Data blocks of a title are broadcast via c parallel equal capacity channels of the broadcast system. The broadcast channels 160 including time-sequentially interleaved sub-channel(s). The title is divided in a plurality of consecutive data block sequences. Each block sequence is assigned to one respective sub-channel. The broadcasting device repeatedly broadcasts each block sequence in the assigned sub- channel. The broadcast receiver 150 has a capacity to simultaneously receive all sub-channels of a plurality r(1<r<= c) of the channels. The broadcast receiver starts reception of all sub-channels of the sequentially lowest r channels. Having received all blocks of the block sequence of a sub-channel of channel i, the receiver terminates reception of the sub-channel in channel i and starts reception of at least one sub-channel of channel r+i.