QR code encoding principle 3 (Japanese Chinese characters and Chinese characters)

1. Japanese kanji is a two-byte postal code, which is encoded in a 13-byte binary code.

The conversion steps are as follows:

1. For characters with JIS values between 8140 (HEX) and 9ffc (HEX:

A) subtract 8140 (HEX) from the JIS value to be converted );

B) Multiply the high byte by C0 (HEX );

C) add the data generated by step B to the low byte;

D) convert the result to a 13-bit binary string.

2. For characters whose JIS value is e040 (HEX) to ebbf (HEX:

A) subtract the JIS value to be converted from c140 (HEX );

B) Multiply the high byte by C0 (HEX );

C) add the data generated by step B to the low byte;

D) convert the result to a 13-bit binary string.

 

2. The conversion steps for Chinese and Japanese Chinese characters are similar:

1. The first byte is 0xa1 ~ Between 0xaa, the second byte is 0xa1 ~ Characters Between 0xfe:

A) first byte minus 0xa1;

B) Multiply the previous result by 0x60;

C) The second byte minus 0xa1;

D) add the result of step B to the result of Step C;

E) convert the result to a 13-bit binary string.

1. The first byte is 0xb0 ~ Between 0xfa and the second byte is 0xa1 ~ Characters Between 0xfe:

A) the first byte minus 0xa6;

B) Multiply the previous result by 0x60;

C) The second byte minus 0xa1;

D) add the result of step B to the result of Step C;

E) convert the result to a 13-bit binary string.