Broadcast signal transmission device, broadcast signal reception device, broadcast signal transmission method, and broadcast signal reception method

A method of processing a broadcast signal in a reception apparatus, the method comprising:

• receiving the broadcast signal including broadcast data;
• demodulating the received broadcast signal;
• frequency deinterleaving the broadcast data in the demodulated broadcast signal;
• convolutionally deinterleaving the frequency deinterleaved broadcast data;
• block deinterleaving the convolutionally deinterleaved broadcast data;
• cell deinterleaving the block deinterleaved broadcast data using an Forward Error Correction (FEC) memory that is a memory for FEC decoding the cell deinterleaved broadcast data,
• wherein the cell deinterleaving includes random writing the block deinterleaved broadcast data into the FEC memory and linear reading the block deinterleaved broadcast data from the FEC memory, and
• wherein the random writing is performed based on a permutation sequence and the permutation sequence varies for every FEC block;
• and
• FEC decoding the cell deinterleaved broadcast data.

A reception apparatus for processing a broadcast signal, the reception apparatus comprising:

• a receiver configured to receive the broadcast signal including broadcast data;
• a demodulator configured to demodulate the received broadcast signal;
• a frequency deinterleaver configured to perform frequency deinterleaving on the broadcast data in the demodulated broadcast signal;
• a convolutional deinterleaver configured to perform convolutionally deinterleaving on the frequency deinterleaved broadcast data;
• a block deinterleaver configured to perform block deinterleaving on the convolutionally deinterleaved broadcast data;
• a cell deinterleaver configured to perform cell deinterleaving on the block deinterleaved broadcast data using an Forward Error Correction (FEC) memory that is a memory for FEC decoding the cell deinterleaved broadcast data,
• wherein the cell deinterleaving includes random writing the block deinterleaved broadcast data into the FEC memory and linear reading the block deinterleaved broadcast data from the FEC memory, and
• wherein the random writing is performed based on a permutation sequence and the permutation sequence varies for every FEC block;
• and
• an FEC decoder configured to FEC decode the cell deinterleaved broadcast data.

A method of processing a broadcast signal in a transmission apparatus, the method comprising:

• Forward Error Correction (FEC) encoding broadcast data;
• cell interleaving the FEC encoded broadcast data using a memory,
• wherein the cell interleaving performs linear writing the FEC encoded broadcast data into the memory and random reading the FEC encoded broadcast data from the memory, and
• wherein the random reading is performed based on a permutation sequence and the permutation sequence varies for every FEC block;
• block interleaving the cell interleaved broadcast data;
• convolutionally interleaving the block interleaved broadcast data;
• frequency interleaving the convolutionally interleaved broadcast data;
• modulating the frequency interleaved broadcast data;
• and
• transmitting the broadcast signal including the modulated broadcast data.

A transmission apparatus for processing a broadcast signal, the transmission apparatus comprising:

• an Forward Error Correction (FEC) encoder configured to FEC encode broadcast data;
• a cell interleaver configured to perform cell interleaving on the FEC encoded broadcast data using a memory,
• wherein the cell interleaver performs linear writing the FEC encoded broadcast data into the memory and random reading the FEC encoded broadcast data from the memory, and
• wherein the random reading is performed based on a permutation sequence and the permutation sequence varies for every FEC block;
• a block interleaver configured to perform block interleaving on the cell interleaved broadcast data;
• a convolutionally interleaver configured to perform convolutionally interleaving on the block interleaved broadcast data;
• a frequency interleaver configured to perform frequency interleaving on the convolutionally interleaved broadcast data;
• a modulator configured to modulate the frequency interleaved broadcast data;
• and
• a transmitter configured to transmit the broadcast signal including the modulated broadcast data.