JPEG codec configuration register 4-7
| HD | Huffman DC Selects the Huffman table for encoding the DC coefficients. |
| HA | Huffman AC Selects the Huffman table for encoding the AC coefficients. |
| QT | Quantization Table Selects quantization table associated with a color component. |
| NB | Number of Block Number of data units minus 1 that belong to a particular color in the MCU. |
| VSF | Vertical Sampling Factor Vertical sampling factor for component i. |
| HSF | Horizontal Sampling Factor Horizontal sampling factor for component i. |