JPEG Huffman encoder AC0
| HCODE52 | Huffman code 52 8 least significant bits of the Huffman code. If the Huffman code is less than 8 bits long, the unused bits must be 0. |
| HLEN52 | Huffman length 52 Number of bits in the Huffman code HCODE52 minus 1. |
| HCODE53 | Huffman code 53 8 least significant bits of the Huffman code. If the Huffman code is less than 8 bits long, the unused bits must be 0. |
| HLEN53 | Huffman length 53 Number of bits in the Huffman code HCODE53 minus 1. |