Method of generating low-density parity-check code transmitted over channel and apparatus utilizing same

The invention discloses a method of generating a low-density parity-check (LDPC) code transmitted over a channel and an apparatus utilizing the same. The method comprises: a transmitter expands a LDPC code check-based matrix to obtain a LDPC code check matrix for use in encoding; the transmitter performs, by the LDPC code check matrix for use in encoding, LDPC encoding on a code word to be encoded to obtain an encoded code word; and the transmitter shortens the encoded code word to generate a LDPC code to be transmitted in a channel. The technical scheme provided by the embodiment of the invention can provide enhanced decoding performance and enhanced flexibility, and can satisfy a need in generating a code word having different code lengths.