APPARATUS FOR TRANSMITTING BROADCAST SIGNALS, APPARATUS FOR RECEIVING BROADCAST SIGNALS, METHOD FOR TRANSMITTING BROADCAST SIGNALS AND METHOD FOR RECEIVING BROADCAST SIGNALS

• US 20160164711A1
• Filed: 09/14/2015
• Published: 06/09/2016
• Est. Priority Date: 12/08/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: SUH, Yonghak, Moon, Sangchul, Shin, Jongwoong, Ko, Woosuk, Hong, Sungryong
• Granted Patent: US 9,641,288 B2
• Time in Patent Office: Days
• CPC Class Codes: H03M 13/1102 Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0023 characterised by the signalling
• CPC Class Codes: H04L 1/0042 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 Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/12 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04L 27/2649 Demodulators
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT

Abstract

A method and an apparatus for transmitting broadcast signals thereof are disclosed. The apparatus for receiving broadcast signals, the apparatus comprises a receiver to receive the broadcast signals, a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme, a frame parser to parse a signal frame from the demodulated broadcast signals, a bit deinterleaver to bit deinterleave data in the parsed signal frame and a decoder to decode the bit deinterleaved data.

Claims

1. A method for receiving broadcast signals, the method comprising:

receiving the broadcast signals;

demodulating the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme;

parsing a signal frame from the demodulated broadcast signals;

bit deinterleaving data in the parsed signal frame; and

decoding the bit deinterleaved data.

2. The method of claim 1, wherein the bit deinterleaving is a reverse process of a bit interleaving in a transmitter, wherein the bit interleaving further includes:

parity interleaving parity bits of 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 a number of the groups and 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 receiving broadcast signals, the apparatus comprising:

a receiver to receive the broadcast signals;

a demodulator to demodulate the received broadcast signals by an OFDM (Orthogonal Frequency Division Multiplex) scheme;

a frame parser to parse a signal frame from the demodulated broadcast signals;

a bit deinterleaver to bit deinterleave data in the parsed signal frame; and

a decoder to decode the bit deinterleaved data.

7. The apparatus of claim 6, wherein the bit deinterleaver performs a reverse process of a bit interleaver in a transmitter, wherein the bit interleaver further includes:

a parity interleaver to interleave parity bits of 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 a number of the groups and 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.