Transmitting apparatus and interleaving method thereof
First Claim
1. A television (TV) broadcast signal transmitting apparatus for transmitting TV broadcast data, the TV broadcast signal transmitting apparatus comprising:
- at least one hardware processor to implement;
an encoder configured to generate a codeword comprising input bits and parity bits, wherein the parity bits are generated based on a low density parity check (LDPC) code having a code rate being 5/15 and a code length being 16200 bits, and wherein the input bits are based on the TV broadcast data;
an interleaver configured to split the codeword into a plurality of bit groups and interleave the plurality of bit groups based on an interleaving order, to provide an interleaved codeword, wherein the interleaving order is obtained based on the code rate being 5/15 and the code length being 16200 bits;
a demultiplexer configured to demultiplex bits of the interleaved codeword to generate data cells;
a mapper configured to map the data cells onto constellation points, wherein the constellation points are based on a 256 quadrature amplitude modulation (QAM) scheme and the code rate being 5/15; and
a signal generator configured to generate a TV broadcast signal based on the constellation points using orthogonal frequency division multiplexing (OFDM) scheme, anda transmitter configured to transmit the TV broadcast signal,wherein the plurality of bit groups are interleaved based on a following equation;
Yj=Xπ
(j) for (0≤
j<
Ngroup),where Xj is a jth bit group among the plurality of bit groups, Yj is a jth bit group among the interleaved plurality of bit groups, Ngroup is a total number of the plurality of bit groups and π
(j) denotes the interleaving order, andwherein the π
(j) is defined as a table below;
0 Assignments
0 Petitions
Accused Products
Abstract
A transmitting apparatus is provided. The transmitting apparatus includes: an encoder configured to perform a low-density parity check (LDPC) encoding on input bits using a parity check matrix to generate an LDPC codeword comprising information word bits and parity bits; an interleaver configured to interleave the LDPC codeword; and a modulator configured to map the interleaved LDPC codeword onto a modulation symbol, wherein the modulator is further configured to map a bit included in a predetermined bit group from among a plurality of bit groups constituting the LDPC codeword onto a predetermined bit of the modulation symbol.
-
Citations
3 Claims
-
1. A television (TV) broadcast signal transmitting apparatus for transmitting TV broadcast data, the TV broadcast signal transmitting apparatus comprising:
-
at least one hardware processor to implement; an encoder configured to generate a codeword comprising input bits and parity bits, wherein the parity bits are generated based on a low density parity check (LDPC) code having a code rate being 5/15 and a code length being 16200 bits, and wherein the input bits are based on the TV broadcast data; an interleaver configured to split the codeword into a plurality of bit groups and interleave the plurality of bit groups based on an interleaving order, to provide an interleaved codeword, wherein the interleaving order is obtained based on the code rate being 5/15 and the code length being 16200 bits; a demultiplexer configured to demultiplex bits of the interleaved codeword to generate data cells; a mapper configured to map the data cells onto constellation points, wherein the constellation points are based on a 256 quadrature amplitude modulation (QAM) scheme and the code rate being 5/15; and a signal generator configured to generate a TV broadcast signal based on the constellation points using orthogonal frequency division multiplexing (OFDM) scheme, and a transmitter configured to transmit the TV broadcast signal, wherein the plurality of bit groups are interleaved based on a following equation;
Yj=Xπ
(j) for (0≤
j<
Ngroup),where Xj is a jth bit group among the plurality of bit groups, Yj is a jth bit group among the interleaved plurality of bit groups, Ngroup is a total number of the plurality of bit groups and π
(j) denotes the interleaving order, andwherein the π
(j) is defined as a table below; - View Dependent Claims (2)
-
-
3. A television (TV) broadcast signal receiving apparatus for receiving TV broadcast data, the TV broadcast signal receiving apparatus comprising:
-
a receiver configured to receive, from a TV broadcast signal transmitting apparatus, a TV broadcast signal which is generated based on orthogonal frequency division multiplexing (OFDM) scheme; a demodulator configured to demodulate the broadcasting signal to generate values according to a 256 quadrature amplitude modulation (QAM) scheme; a deinterleaver configured to split the values into a plurality of groups and deinterleave the plurality of groups to provide deinterleaved values; and a decoder configured to decode bits using the deinterleaved values based on a low density parity check (LDPC) code having a code rate being 5/15 and a code length being 16200 bits, wherein the decoded bits are based on the TV broadcast data, wherein the plurality of groups are deinterleaved based on a following equation;
Xj=Yπ
(j) for (0≤
j<
Ngroup),where Xj is a jth group among the plurality of groups, Yj is a jth group among the deinterleaved plurality of groups, Ngroup is a total number of the plurality of groups, and π
(j) denotes a permutation order for the deinterleaving, andwherein the π
(j) is defined as follows;
-
Specification