Encoding method, apparatus, and device and computer-readable storage medium

An encoding method, comprising:

• in response to a first code rate K/Nmax being greater than a code rate threshold Rt, reading a first matrix from a preset code table based on a second matrix, wherein the second matrix comprises a matrix that is read from the preset code table and that corresponds to a maximum supported code length Nmax and Rt, where K is an integer and N is an integer;
• reading K rows and (N−K) columns starting from a preset first location in the first matrix to obtain a third matrix;
• and
• adding a unit matrix with K rows and K columns to a left side of the third matrix to obtain a generator matrix of an (N, K) linear block code,
• wherein NmaxxRt rows and (Nmax−K) columns of the second matrix in a first direction are consistent with NmaxxRt rows and (Nmax−K) columns of the first matrix in a second direction.

An encoding apparatus, comprising:

• a processor;
• and
• a memory having instructions stored thereon that, when executed by the processor, cause the encoding apparatus to:
• in response to a first code rate K/Nmax being less than or equal to a code rate threshold Rt, read a first matrix from a preset code table based on a second matrix, wherein the second matrix comprises a matrix that is read from the preset code table and that corresponds to a maximum supported code length Nmax and Rt, where K is an integer and N is an integer,
• read K rows and (N−K) columns starting from a preset first location in the first matrix to obtain a third matrix;
• and
• add a unit matrix with K rows and K columns to a left side of the third matrix to obtain a generator matrix of an (N, K) linear block code,
• wherein K rows and (Nmax−Nmax×Rt) columns of the second matrix in a first direction are consistent with K rows and (Nmax−Nmax×Rt) columns of the first matrix in a second direction.