Transmitter and shortening method thereof
First Claim
1. A transmitting method of layer1-detail (L1D) signaling information for a television (TV) broadcasting, by a TV broadcasting transmitting apparatus which is operable based on a mode among a plurality of modes, the method comprising:
- receiving L1D input bits to be encoded and modulated, wherein the L1D input bits are based on the L1D signaling information;
filling a bit space of a predetermined size with the L1D input bits and one or more zero padding bits based on a zero padding order of the mode, if a size of the L1D input bits is less than the predetermined size;
encoding bits included in the bit space based on a low density parity check (LDPC) code having a code rate of the mode being 3/15 and a code length of the mode being 16200 bits;
removing the one or more zero padding bits from among the encoded bits included in the bit space;
modulating remaining bits in the bit space after the removing, to constellation points, wherein the modulating is based on a quadrature phase shift keying (QPSK) modulation of the mode;
generating a TV broadcasting signal based on the constellation points using orthogonal frequency division (OFDM) processing; and
transmitting the TV broadcasting signal,wherein the filling the bit space comprises;
dividing the bit space into a plurality of bit group areas,calculating a number of zero padding bits to be padded,determining at least one bit group area to which the one or more zero padding bits are padded among the plurality of bit group areas based on the calculated number and the zero padding order of the mode, andpadding the one or more zero padding bits to the at least one determined bit group area, andwherein the zero padding order of the mode is represented below;
1 Assignment
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Accused Products
Abstract
A transmitter is provided. The transmitter includes: an outer encoder configured to encode input bits to generate outer-encoded bits including the input bits and parity bits; a zero padder configured to constitute Low Density Parity Check (LDPC) information bits including the outer-encoded bits and zero bits; and an LDPC encoder configured to encode the LDPC information bits, wherein the LDPC information bits are divided into a plurality of bit groups, and wherein the zero padder pads zero bits to at least some of the plurality of bit groups, each of which is formed of a same number of bits, to constitute the LDPC information bits based on a predetermined shortening pattern which provides that the some of the plurality of bit groups are not sequentially disposed in the LDPC information bits.
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Citations
4 Claims
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1. A transmitting method of layer1-detail (L1D) signaling information for a television (TV) broadcasting, by a TV broadcasting transmitting apparatus which is operable based on a mode among a plurality of modes, the method comprising:
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receiving L1D input bits to be encoded and modulated, wherein the L1D input bits are based on the L1D signaling information; filling a bit space of a predetermined size with the L1D input bits and one or more zero padding bits based on a zero padding order of the mode, if a size of the L1D input bits is less than the predetermined size; encoding bits included in the bit space based on a low density parity check (LDPC) code having a code rate of the mode being 3/15 and a code length of the mode being 16200 bits; removing the one or more zero padding bits from among the encoded bits included in the bit space; modulating remaining bits in the bit space after the removing, to constellation points, wherein the modulating is based on a quadrature phase shift keying (QPSK) modulation of the mode; generating a TV broadcasting signal based on the constellation points using orthogonal frequency division (OFDM) processing; and transmitting the TV broadcasting signal, wherein the filling the bit space comprises; dividing the bit space into a plurality of bit group areas, calculating a number of zero padding bits to be padded, determining at least one bit group area to which the one or more zero padding bits are padded among the plurality of bit group areas based on the calculated number and the zero padding order of the mode, and padding the one or more zero padding bits to the at least one determined bit group area, and wherein the zero padding order of the mode is represented below; - View Dependent Claims (2, 3, 4)
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Specification