Encoding method and apparatus

An encoding apparatus, wherein the encoding apparatus comprises:

• a processor;
• and
• a memory coupled to the processor, wherein the memory is configured to store a program and data and the processor is configured to execute the program stored in the memory, to implement the following functions:
• perform bit mapping on krv1 information source bits whose reliability is lower than a first threshold in a first bit sequence, to obtain a second bit sequence, wherein the first bit sequence is a bit sequence obtained by performing bit mapping after cyclic redundancy check (CRC) bits are added to an information source bit sequence, the krv1 information source bits are bits in the information source bit sequence, and a length of the first bit sequence is equal to a length of the second bit sequence;
• perform an exclusive OR operation on bits in a bit sequence obtained by encoding the first bit sequence and bits in a bit sequence obtained by encoding the second bit sequence, to obtain a third bit sequence;
• or the processor is further configured to encode the second bit sequence, to obtain a third bit sequence;
• and
• map, to an orthogonal frequency-division multiplexing (OFDM) symbol, the third bit sequence and the bit sequence obtained by encoding the first bit sequence.

A computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer is enabled to perform the method comprising:

• performing bit mapping on krv1 information source bits whose reliability is lower than a first threshold in a first bit sequence, to obtain a second bit sequence, wherein the first bit sequence is a bit sequence obtained by performing bit mapping after cyclic redundancy check (CRC) bits are added to an information source bit sequence, the krv1 information source bits are bits in the information source bit sequence, and a length of the first bit sequence is equal to a length of the second bit sequence;
• performing one of an exclusive OR operation on bits in a bit sequence obtained by encoding the first bit sequence and bits in a bit sequence obtained by encoding the second bit sequence, to obtain a third bit sequence;
• or encoding the second bit sequence, to obtain a third bit sequence;
• and
• mapping, to an orthogonal frequency-division multiplexing (OFDM) symbol, the third bit sequence and the bit sequence obtained by encoding the first bit sequence.