Encoding method and apparatus

An encoding apparatus, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:
• determine a first encoding parameter based on a first Bose-Chaudhuri-Hocquenghem (BCH) code, wherein the first BCH code is a to-be-coded BCH code, the first encoding parameter is a first code or a generator matrix of a first code, the first code has a code length of n and an information bit length of k, n is greater than 0, and k is greater than 0;
• perform BCH encoding based on the first encoding parameter
• determining the first code based on a second code comprising:
• shortening the second code to obtain a third code;
• and
• puncturing, based on a code rate of the third code being less than k/n, the third code to N+k−ki−n bits to obtain the first code comprising:
• performing:
• puncturing, based on the first BCH code being a non-systematic code, the first N+k−ki−n bits of the third code;
• puncturing the last N+k−ki−n bits of the third code;
• or
• puncturing the N+k−ki−n bits of the third code according to a preset puncturing sequence;
• and
• performing:
• puncturing, based on the first BCH code being a systematic code, the first N+k−ki−n bits in non-systematic bits of the third code;
• puncturing the last N+k−ki−n bits in non-systematic bits of the third code;
• puncturing the first N+k−ki−n bits in systematic bits of the third code;
• puncturing the last N+k−ki−n bits in systematic bits of the third code;
• puncturing N+k−ki−n bits in non-systematic bits of the third code according to the preset puncturing sequence;
• puncturing N+k−ki−n bits in systematic bits of the third code according to the puncturing sequence;
• or
• puncturing the N+k−ki−n bits of the third code according to the puncturing sequence.

A non-transitory computer-readable storage medium storing a program to be executed by a processor, the program including instructions to:

• determine a first encoding parameter based on a first Bose-Chaudhuri-Hocquenghem (BCH) code, wherein the first BCH code is a to-be-coded BCH code, the first encoding parameter is a first code or a generator matrix of a first code, the first code has a code length of n and an information bit length of k, n is greater than 0, and k is greater than 0;
• perform BCH encoding based on the first encoding parameter
• determining the first code based on a second code comprising:
• shortening the second code to obtain a third code;
• and
• puncturing, based on a code rate of the third code being less than k/n, the third code to N+k−ki−n bits to obtain the first code comprising:
• performing:
• puncturing, based on the first BCH code being a non-systematic code, the first N+k−ki−n bits of the third code;
• puncturing the last N+k−ki−n bits of the third code;
• or
• puncturing the N+k−ki−n bits of the third code according to a preset puncturing sequence;
• and
• performing:
• puncturing, based on the first BCH code being a systematic code, the first N+k−ki−n bits in non-systematic bits of the third code;
• puncturing the last N+k−ki−n bits in non-systematic bits of the third code;
• puncturing the first N+k−ki−n bits in systematic bits of the third code;
• puncturing the last N+k−ki−n bits in systematic bits of the third code;
• puncturing N+k−ki−n bits in non-systematic bits of the third code according to the preset puncturing sequence;
• puncturing N+k−ki−n bits in systematic bits of the third code according to the puncturing sequence;
• or
• puncturing the N+k−ki−n bits of the third code according to the puncturing sequence.