Data encoding and decoding methods and computer readable medium thereof

A computer readable medium having computer executable data, which comprises executing codes and when executed by an electronic device, cause the device to execute a data encoding method for encoding a data which has a plurality of bytes each having n bits, wherein the data encoding method comprises:

• a. defining a specific value;
• b. dividing the data into one or a plurality of data blocks each having m bytes, wherein m≦2n−2;
• c. respectively obtaining a replacing value not appearing in the m bytes from each data block, wherein the replacing value is not equal to the specific value;
• d. respectively replacing the values of the bytes being the specific value as the replacing value in the m bytes of each data block;
• and
• e. respectively allocating a starting byte at the starting of each data block and storing the replacing value in the starting byte so as to respectively obtain the data block being encoded;
• wherein each data block being encoded has m+1 bytes.

A data decoding method, wherein the data has a plurality of data blocks each having m+1 bytes, each the bytes has n bits, wherein m≦2n−2, the data decoding method comprises:

• a. defining a specific value;
• b. respectively reading a starting byte of each data blocks so as to obtain a replacing value;
• c. respectively replacing the values of the bytes being the replacing value as the specific value in the m bytes following the starting byte of each data block;
• and
• d. releasing the starting byte of each data block so as to respectively obtain the data block being decoded;
• wherein each data block being decoded has m bytes.

A computer readable medium having computer executable data, which comprises executing codes and when executed by an electronic device, cause the device to a data decoding method for decoding a data which has a plurality of bytes each having n bits, wherein the data decoding method comprises:

• a. defining a specific value;
• b. respectively reading a starting byte of each data blocks so as to obtain a replacing value;
• c. respectively replacing the values of the bytes being the replacing value as the specific value in the m bytes following the starting byte of each data block;
• and
• d. releasing the starting byte of each data block so as to respectively obtain the data block being decoded;
• wherein each data block being decoded has m bytes.