Data transmission method, device, computer-readable storage medium, and system

A data transmission system, comprising:

• a transmitting device and a receiving device connected by at least two broadcast channels,
• wherein the transmitting device is configured to encode a data set to be transmitted, the encoded data set includes at least one data group, the at least one data group includes one or more data packets, and wherein the transmitting device is configured to transmit the one or more data packets through the at least two broadcast channels, and
• wherein the receiving device is configured to detect the one or more data packets transmitted through the at least two broadcast channels, and when detecting that a data packet has been lost, recover the lost data packet based on one or more other already received data packets included in a same data group as the lost data packet.