Patent ID: 7840882

Claim:
A method of processing digital broadcast data in a digital television (DTV) transmitting system, the method comprising: generating, by a signal generator, a broadcast signal comprising a first data group including a plurality of packets, wherein an ith packet in the first data group comprises enhanced data, but no main data, and wherein the main data comprises audio or video data and the enhanced data comprises supplemental data capable of being transmitted via a same channel as the main data; interleaving, by an interleaver, the first data group to generate a second data group comprising a plurality of packets, wherein an ith packet in the second data group comprises the enhanced data and main data, wherein a jth packet in the second data group comprises the enhanced data, but no main data, wherein a kth packet in the second data group comprises the enhanced data and the main data, and wherein k>j>i, and wherein i>0; and modulating, by a transmitting unit, the second data group for data transmission.