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In a packet transmission method of forming m error correction code packets from n (n>m) data packets including headers, and transmitting the error correction code packets, an n-bit data code portion is formed by reading out pieces of bit information, of the data packets excluding headers, which are

In a packet transmission method of forming m error correction code packets from n (n>m) data packets including headers, and transmitting the error correction code packets, an n-bit data code portion is formed by reading out pieces of bit information, of the data packets excluding headers, which are located at the same bit position, and sequentially arranging the pieces of bit information. An m-bit error correction code portion is formed by coding information of the data code portion and forming an error correction frame constituted by the data code portion and the error correction code portion. Each bit information of the error correction code portion is assigned as bit information of a corresponding error correction code packet at the same bit position as the bit position of each data packet, from which the bit information is read out. Formation of the data code portion and the error correction frame is repeatedly performed with respect to all bits excluding the headers of the data packets, thereby forming m error correction code packets, each consisting of the same number of bits as that of each data packet. The formed error correction code packets are transmitted, together with the data packets. A packet transmission apparatus is also disclosed.

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A packet transmission error correction method which uses m error correction code packets formed from n (n>m) data packets including headers, said method comprising the steps of: (a) forming an n-bit data code portion by reading out from each of the data packets bit information at a bit position x an

A packet transmission error correction method which uses m error correction code packets formed from n (n>m) data packets including headers, said method comprising the steps of: (a) forming an n-bit data code portion by reading out from each of the data packets bit information at a bit position x and sequentially arranging the bit information; (b) forming an m-bit error correction code portion by coding the sequentially arranged bit information of the data code portion and forming an error correction frame constituted by the data code portion and the error correction code portion; (c) assigning each bit information of the error correction code portion as bit information of a corresponding one of the error correction code packets at the bit position x; (d) repeatedly performing steps (a) to (c) with respect to all bits of the data packets excluding the headers, thereby forming m error correction code packets; (e) transmitting the formed error correction code packets together with the data packets; (f) receiving the formed error correction code packets together with the data packets; (g) reconstructing the data code portions of the error correction frames by performing step (a) with respect to all bits of the received data packet; (h) reconstructing the error correction code portions of the error correction frames by (1) reading out from each of the error correction code packets bit information at a bit position y and sequentially arranging the bit information, and (2) repeatedly performing sub-step (1) with respect to all bits of the error correction code packets excluding header bits; (i) when there is a data loss or a data error in a data packet, decoding the data code portion of the error correction frame on the basis of bit information contained in the corresponding error correction code portion; and (j) reproducing the data packet in which the data loss or the data error has occurred on the basis of bit information contained in the decoded data code portion.