Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

Patent metadata

Field	Value
Publication number	US-2016164637-A1
Application number	US-201514853291-A
Country	US
Kind code	A1
Filing date	Sep 14, 2015
Priority date	Dec 8, 2014
Publication date	Jun 9, 2016
Grant date	—

Abstract

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for transmitting broadcast signals, the apparatus comprises an encoder to encode service data, a bit interleaver to interleave the encoded service data, a frame builder to build at least one signal frame including the bit interleaved service data, wherein the at least one signal frame includes a plurality of OFDM symbols, a modulator to modulate data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme and a transmitter to transmit the broadcast signals having the modulated data.

First claim

What is claimed is:

1 . A method for transmitting broadcast signals, the method comprising:
encoding service data; bit interleaving the encoded service data; building at least one signal frame including the bit interleaved service data, wherein the at least one signal frame includes a plurality of OFDM symbols; modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and transmitting the broadcast signals having the modulated data.

2 . The method of claim 1 , wherein the bit interleaving further includes:
parity interleaving parity bits of the encoded service data to spilt into groups; group-wise interleaving the split groups by using a permutation order; and block interleaving the interleaved groups.

3 . The method of claim 2 , wherein the permutation order is determined based on a modulation type and a code rate.

4 . The method of claim 2 , wherein the block interleaving further includes:
writing bits in each group by a row-wise scheme; and reading out 1 bit from each row by a column-wise scheme.

5 . The method of claim 2 , wherein the block interleaving further includes:
writing each group by a column-wise scheme; and reading out written bits by a row-wise scheme.

6 . An apparatus for transmitting broadcast signals, the apparatus comprising:
an encoder to encode service data; a bit interleaver to interleave the encoded service data; a frame builder to build at least one signal frame including the bit interleaved service data, wherein the at least one signal frame includes a plurality of OFDM symbols; a modulator to modulate data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and a transmitter to transmit the broadcast signals having the modulated data.

7 . The apparatus of claim 6 , wherein the bit interleaver further includes:
a parity interleaver to interleave parity bits of the encoded service data to spilt into groups; a group-wise interleaver to group-wise interleave the split groups by using a permutation order; and a block interleaver to interleave the group-wise interleaved groups.

8 . The apparatus of claim 7 , wherein the permutation order is determined based on a modulation type and a code rate.

9 . The apparatus of claim 7 , wherein the block interleaver further performs writing bits in each group by a row-wise scheme and reading out 1 bit from each row by a column-wise scheme.

10 . The apparatus of claim 7 , wherein the block interleaver further performs writing each group by a column-wise scheme and reading out written bits by a row-wise scheme.

Assignees

• Lg Electronics Inc

Inventors

• Suh Yonghak
• Moon Sangchul
• Shin Jongwoong
• Ko Woosuk
• Hong Sungryong

Classifications

• H03M13/2792

  Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing · CPC title

• H04L1/0045

  Arrangements at the receiver end · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04L1/0042

  Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape (H04L1/0067 takes precedence) · CPC title

• H04L1/0057

  Block codes (H04L1/0061, H04L1/0064 take precedence) · CPC title