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

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

• a receiver configured to receive the broadcast signal including broadcast data and physical layer signaling information, wherein the physical layer signaling information includes frequency interleaver information for indicating whether a frequency interleaver is applied to the broadcast data;
• a frequency deinterleaver configured to perform frequency deinterleaving on the broadcast data selectively based on the frequency interleaver information, wherein the frequency deinterleaving is performed on the broadcast data in response to the frequency interleaver information having a first value and wherein the frequency deinterleaving is not performed on the broadcast data in response to the frequency interleaver information having a second value;
• a convolutional deinterleaver configured to perform convolutionally deinterleaving on the broadcast data which the frequency deinterleaving is performed or not performed;
• 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 a memory, wherein the cell deinterleaving includes random writing the block deinterleaved broadcast data into the memory and linear reading the block deinterleaved broadcast data from the memory, and wherein the random writing is performed based on a permutation sequence and the permutation sequence varies for every Forward Error Correction (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;
• performing frequency interleaving on the convolutionally interleaved broadcast data selectively;
• and
• transmitting the broadcast signal including the broadcast data which the frequency interleaving is performed or not performed,
• wherein the broadcast signal further includes physical layer signaling information,
• wherein the physical layer signaling information includes frequency interleaver information for indicating whether a frequency interleaver is applied to the broadcast data,
• wherein, when the frequency interleaving is performed on the broadcast data, the frequency interleaver information has a first value, and
• wherein, when the frequency interleaving is not performed on the broadcast data, the frequency interleaver information has a second value.

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 selectively;
• and
• a transmitter configured to transmit the broadcast signal including the broadcast data which the frequency interleaving is performed or not performed,
• wherein the broadcast signal further includes physical layer signaling information,
• wherein the physical layer signaling information includes frequency interleaver information for indicating whether the frequency interleaver is applied to the broadcast data,
• wherein, when the frequency interleaving is performed on the broadcast data, the frequency interleaver information has a first value, and
• wherein, when the frequency interleaving is not performed on the broadcast data, the frequency interleaver information has a second value.