Digital broadcasting transmission and reception system

A digital broadcasting transmission and reception system comprising a digital broadcasting transmission apparatus and a digital broadcasting reception apparatus,

• wherein the digital broadcasting transmission apparatus includes a randomizer, an SRS inserter, a parity area appender, a first interleaver, a robust processor, a deinterleaver, an RS encoder, a second interleaver, a compatibility parity generator, a trellis encoder, and a MUX,
• wherein the robust processor codes a robust stream of a dual transport stream in which a normal stream and the robust stream are combined and comprises:
• a demultiplexer (DE-MUX) that separates the normal stream and the robust stream from the dual transport stream;
• a robust encoder that appends a parity to the separated robust stream;
• a robust interleaver that interleaves the robust stream having the appended parity;
• and
• a multiplexer (MUX) that combines the interleaved robust stream and the separated normal stream, and
• wherein the digital broadcasting reception apparatus including a demodulator, an equalizer, a viterbi decoder, a first deinterleaver, an RS decoder, a first derandomizer, a robust decoder, a second interleaver, a parity eraser, a second derandomizer, and a robust DE-MUX,
• wherein the robust decoder decodes a received robust stream of a received dual transport stream where a received normal stream and the received robust stream are combined and comprises:
• a first decoder that trellis-decodes the received robust stream;
• a robust deinterleaver that interleaves the trellis-decoded robust stream;
• a second decoder that convolution decodes the deinterleaved robust stream;
• a robust interleaver that interleaves the convolution-decoded robust stream;
• and
• a frame formatter that adds decoded data of the second decoder to a part that corresponds to a position of the received robust stream of a frame where the received normal stream and the received robust stream are mixed.