BACKGROUND

1. Field

Apparatuses and methods consistent with exemplary embodiments of the inventive concept relate to a transmitter, a receiver, and a signal processing method thereof, which can process L1 signaling.

2. Description of the Related Art

In the 21stcentury information society, broadcasting communication services are characterized by digitalization, multi-channel, broadband, and high quality. Recently, as a high-quality digital television (TV), a portable media player (PMP), and a portable broadcasting device have been widely used, there is an increasing demand to support various methods for receiving digital broadcasting services.

In compliance with such a demand, the standards group has established various standards and specifications, such as the digital video broadcasting the second generation European terrestrial (DVB-T2), to satisfy user needs. However, there is still a need for better transmission and reception performances for broadcasting services.

SUMMARY

One or more exemplary embodiments provide a transmitter, a receiver, and a signal processing method thereof, which can improve transmission and reception performance of broadcasting signals.

According to an aspect of an exemplary embodiment, there is provided a transmitter which may include: a segmenter configured to segment an L1 signaling of a frame into a plurality of segmented L1 signalings such that each of the segmented L1 signalings has bits a number of which is equal to or smaller than a predetermined number; and an encoder configured to perform a Bose, Chaudhuri, Hocquenghem (BCH) and a low density parity check (LDPC) encoding, or the LDPC encoding without the BCH encoding, with respect to the segmented L1 signalings.

Here, the predetermined number may be smaller than at least one of a length of an information word of the BCH encoding and a length of an information word of the LDPC encoding.

Further, the predetermined number may be calculated based on t a predetermined transmission code rate, a number of parity bits generated by the BCH encoding, and a number of parity bits generated by the LDPC encoding.

In this case, the predetermined number may be calculated on the basis of the following equation,

kth=⌊Rt1-Rt·Npurity⌋-Nbch⁢_⁢parity
where Kthis the predetermined number, Rtis the predetermined transmission code rate, Nparityis the number of parity bits generated by the LDPC encoding, and Nbch_parityis the number of parity bits generated by the BCH encoding.

According to an aspect of another exemplary embodiment, there is provided a signal processing method of a transmitter which may include: segmenting an L1 signaling of a frame into a plurality of segmented L1 signalings such that each of the segmented L1 signalings has bits a number of which is equal to or smaller than a predetermined number; and performing BCH encoding, and LDPC encoding, or the LDPC encoding without the BCH encoding, with respect to the segmented L1 signalings.

Here, the predetermined number may be smaller than at least one of a length of an information word of the BCH encoding and a length of an information word of the LDPC encoding.

Further, the predetermined number may be calculated based on a predetermined transmission code rate, a number of parity bits generated by the BCH encoding, and a number of parity bits generated by the LDPC encoding.

In this case, the predetermined number may be calculated on the basis of the above equation.

According to an aspect of still another exemplary embodiment, there is provided a receiver which may include: a decoder configured to perform LDPC decoding and BCH decoding, or the LDPC decoding without the BCH decoding, to output a plurality of segmented L1 signalings which are generated by segmenting an L1 signaling of a frame such that each of the segmented L1 signalings has bits a number of which is equal to or smaller than a predetermined number, based on a channel value of a signal that is received from a transmitter; and a desegmenter configured to perform desegmentation of the plurality of segmented L1 signalings output from the LDPC decoding and the BCH decoding or the LDPC decoding without the BCH decoding.

Here, the predetermined number may be smaller than one of a length of an information word of the BCH encoding and a length of an information word of the LDPC encoding.

Further, the predetermined number may be calculated based on t a predetermined transmission code rate, a number of parity bits generated by BCH encoding performed by the transmitter, and a number of parity bits generated by LDPC encoding performed by the transmitter.

In this case, the predetermined number may be calculated on the basis of the above equation.

According to an aspect of still another exemplary embodiment, there is provided a signal processing method of a receiver which may include: performing LDPC decoding and BCHdecoding, or the LDPC decoding without the BCH decoding, to output a plurality of segmented L1 signalings which are generated by segmenting an L1 signaling of a frame such that each of the segmented L1 signalings has bits a number of which is equal to or smaller than a predetermined number, on the basis of a channel value of a signal that is received from a transmitter; and performing desegmentation of the plurality of segmented L1 signalings output from the LDPC decoding and the BCH decoding or the LDPC decoding without the BCH decoding.

Here, the predetermined number may be smaller than one of a length of an information word of the BCH encoding and a length of an information word of the LDPC encoding.

Further, the predetermined number may be calculated based on t a predetermined transmission code rate, a number of parity bits generated by BCH encoding performed by the transmitter, and a number of parity bits generated by LDPC encoding performed by the transmitter.

In this case, the predetermined number may be calculated on the basis of the above equation.

As described above, according to various exemplary embodiments of the inventive concept, since the transmitter efficiently segments and encodes the L1 signaling, transmission and reception performances of the transmitter and the receiver may be improved.

