US 11,909,419 B2Granted

Transmitting apparatus and signal processing method thereof

AssigneeSamsung Electronics Co., Ltd.

InventorsSe-Ho Myung, Hong-Sil Jeong, Kyung-joong Kim

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Abstract

A transmitting apparatus and a receiving apparatus are provided. The transmitting apparatus includes: an encoder configured to generate a low density parity check (LDPC) codeword by performing LDPC encoding; an interleaver configured to interleave the LDPC codeword; and a modulator configured to modulate the interleaved LDPC codeword according to a modulation method to generate a modulation symbol. The interleaver is formed of a plurality of columns each including a plurality of rows and includes a block interleaver configured to divide each of the plurality of columns into a first part and a second part and interleave the LDPC codeword, the number of rows constituting each column divided into the first part is determined differently depending upon the modulation method, wherein the number of rows constituting each column divided into the second part is determined depending upon the number of rows constituting each column divided into the first part.

Claims10

Dependent claims

A receiving apparatus comprising:

a demodulator configured to demodulate a signal received at the receiving apparatus from a transmitting apparatus to generate values based on a modulation method, the signal carrying broadcasting data;
a block deinterleaver configured to write values of the generated values in a first part of columns, write remaining values of the generated values in a second part of the columns in a writing direction, read the values written in the first part, and read the remaining values written in the second part in a reading direction,
a group deinterleaver configured to split the values read from the first part and the remaining values read from the second part into a plurality of groups, and deinterleave the plurality of groups;
and
a decoder configured to decode values of the deinterleaved plurality of groups to output bits, wherein the bits correspond to the broadcasting data,
wherein the first part comprises a part of each of the columns and the second part comprises a remaining part of the each of the columns,
wherein a number of the values written in the first part is determined based on the modulation method and a number of the plurality of groups,
wherein a number of the remaining values written in the second part is determined based on the number of the values written in the first part,
wherein the modulation method is one of quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM), 64-QAM and 256-QAM, and
wherein the remaining values are written from a first column of the second part after the values are written to a last column of the first part.

7 more elements

A transmitting apparatus comprising:

a group interleaver configured to split a codeword into a plurality of bit groups, and interleave the plurality of bit groups;
a block interleaver configured to write some bits among the interleaved plurality of bit groups in a first part of columns, write remaining bits among the interleaved plurality of bit groups in a second part of the columns in a writing direction, read the bits written in the first part, and read the remaining bits written in the second part in a reading direction which is different from the writing direction;
a constellation mapper configured to map the some bits read from the first part and the remaining bits read from the second part to constellation points based on a modulation method;
and
a transmitter configured to transmit a signal which is generated based on the constellation points to a receiver,
wherein the modulation method is one of quadrature phase shift keying (QPSK), 16-quadrature amplitude modulation (QAM), 64-QAM and 256-QAM,
wherein the first part comprises a part of each of the columns and the second part comprises a remaining part of the each of the columns,
wherein a number of the bits written in the first part is determined based on the modulation method and a number of the plurality of bit groups,
wherein a number of the remaining bits is determined based on a length of the codeword and the number of the bits written in the first part, and
wherein the remaining bits are written from a first column of the second part after the bits are written to a last column of the first part.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/066,710Filed 15 Dec 2022 · continuation
Priority: KR 10-2014-01344416 Oct 2014
Published: US 2023/0318629 A15 Oct 2023
Granted: 20 Feb 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification21 codes

H03M 13/2778
Using interleaving techniques: interleaver using block-wise interleaving, e.g. the interleaving matrix is sub-divided into sub-matrices and the…
H03M 13/1165
Quasi-cyclic LDPC [QC-LDPC] codes, i.e. the parity-check matrix being composed of permutation or circulant sub-matrices: qC-LDPC codes as defined…
H03M 13/255
Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded…: with…
H03M 13/2703
Using interleaving techniques: the interleaver involving at least two directions

Family

Application61/886,849Us provisional application · filed 4 Oct 2013
Application14/506,794Parent of this continuation · filed 6 Oct 2014
Application16/424,466Parent of this continuation · filed 28 May 2019
US 10,355,714 B2Parent of this continuation · filed 16 Jul 2019
Application17/329,779Parent of this continuation · filed 25 May 2021
US 11,043,973 B2Parent of this continuation · filed 22 Jun 2021
US 2023/0318629 A1Pre-grant publication · published 5 Oct 2023
US 11,575,393 B2Parent of this continuation
US 2015/0100845 A1Published application
US 2019/0280720 A1Published application
US 2021/0288671 A1Published application
US 11,909,419 B2This patent

From the US filing history. Foreign family members aren’t listed.