Sending method, receiving method, apparatus, system, device, and storage medium

A method comprising:

• obtaining an encoded data block, wherein the encoded data block comprises a plurality of data blocks, a plurality of first parity bit groups, and a forward error correction (FEC) parity bit group, wherein the plurality of first parity bit groups are generated by separately encoding data of the plurality of data blocks in a plurality of encoding manners and are in a one-to-one correspondence with the plurality of data blocks, and the FEC parity bit group corresponds to the plurality of data blocks;
• and
• checking the corresponding data blocks based on the plurality of first parity bit groups and/or the FEC parity bit group to obtain a decoding result of the encoded data block.

An apparatus comprising:

• an obtaining circuit configured to obtain an encoded data block, wherein the encoded data block comprises a plurality of data blocks, a plurality of first parity bit groups, and a forward error correction (FEC) parity bit group, wherein the plurality of first parity bit groups are generated by separately encoding data of the plurality of data blocks in a plurality of encoding manners and are in a one-to-one correspondence with the plurality of data blocks, and the FEC parity bit group corresponds to the plurality of data blocks;
• and
• a processing circuit configured to check the corresponding data blocks based on the plurality of first parity bit groups and/or the FEC parity bit group to obtain a decoding result of the encoded data block.