Phiên bản mã QR 28 (129×129)
QR version 28 is 129×129 modules: up to 3,669 digits, 2,223 alphanumeric, 1,528 bytes or 940 kanji at level L; 658 bytes at H.
Version 28 data capacity
Maximum characters in a single encoding mode, per error-correction level (ISO/IEC 18004:2015, Table 7). Mixed-mode data and ECI headers reduce these limits.
| EC level | Recovers | Số | Chữ và số | Byte | Kanji |
|---|---|---|---|---|---|
| L | ~7% | 3669 | 2223 | 1528 | 940 |
| M | ~15% | 2857 | 1732 | 1190 | 732 |
| Q | ~25% | 2085 | 1263 | 868 | 534 |
| H | ~30% | 1581 | 958 | 658 | 405 |
Codewords and error-correction blocks
The symbol carries 1921 codewords in total, split between data and Reed-Solomon error correction (ISO/IEC 18004:2015, Table 9).
| EC level | Data codewords | EC codewords | Blocks (count × total, data, EC codewords) |
|---|---|---|---|
| L | 1531 | 390 | 3 × (147, 117, 30) + 10 × (148, 118, 30) |
| M | 1193 | 728 | 3 × (73, 45, 28) + 23 × (74, 46, 28) |
| Q | 871 | 1050 | 4 × (54, 24, 30) + 31 × (55, 25, 30) |
| H | 661 | 1260 | 11 × (45, 15, 30) + 31 × (46, 16, 30) |
Symbol structure
- Mô-đun
- 129 × 129
- Data modules (codeword bits + remainder bits)
- 15371
- Remainder bits
- 3
- Alignment patterns
- 33 (centre rows/columns 6, 26, 50, 74, 98, 122)
- Version information blocks
- Yes (2 × 18 bits)