TRANSMITTER AND SHORTENING METHOD THEREOF

摘要

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 generate a plurality of bit groups each of which is formed of a same number of bits, determine whether a number of the outer-encoded bits satisfies a predetermined number of bits required according to at least one of a code rate and a code length for Low Density Parity Check (LDPC) encoding, pads zero bits to some of the bits in the bit groups if the number of the outer-encoded bits is less than the predetermined number of bits, and maps the outer-encoded bits to remaining bits in the bit groups, based on a predetermined shortening pattern, thereby to constitute LDPC information bits; and an LDPC encoder configured to encode the LDPC information bits, wherein the some of the bits, in which zero bits are padded, are included in some of the bit groups which are not sequentially disposed in the LDPC information bits.

主权项

1. A transmitter, including:
an outer encoder configured to encode input bits to generate parity bits; a zero padder configured to constitute LDPC information bits including outer-encoded bits including the input bits and the parity bits, and zero bits; and an LDPC encoder configured to encode the LDPC information bits, wherein the zero padder pads the zero bits to at least some of bit groups constituting the LDPC information bits based on pattern described below:πS(j) (0 ≦ j < Ninfo.group)πS(0)πS(1)πS(2)πS(3)πS(4)πS(5)πS(6)πS(7)πS(8)Ninfo_groupπS(9)πS(10)πS(11)πS(12)πS(13)πS(14)πS(15)πS(16)πS(17)1801215132579861610141171143 where πs(j) represents an order of a j-th bit group and Ninfo_group represents a number of the bit groups.