Chrominance NR Parameters

The main debugging parameters for the chrominance NR interface NRc include sfc, tfc, trc, tpc, mode, and presfc.

• The main chrominance NR parameters include sfc, trc, tfc, and tpc. In low light conditions where chrominance noise is strong, you can adjust the parameters as follows: sfc = 255, tfc = 15, tpc = 15, trc =255. In normal light conditions where chrominance noise is weak, you can adjust the four parameters to smaller values.
• sfc: strength of chrominance spatial filtering. The value range is [0, 255].
• tfc: strength of chrominance temporal filtering. The value of tfc should not exceed 15 in low light. Otherwise, side effects such as color smearing occur. The value range is [0, 32].
• tpc: filter type of chrominance temporal filtering. It is recommended that the value of tpc be the same as that of tfc. The value range is [0, 32].
• trc: used to suppress color dyeing in the motion region. It is recommended that trc be adjusted to be within 0–10 when color dyeing occurs. The value range is [0, 255].
• mode: chrominance filtering mode. When mode is set to 0, the traditional chrominance filtering mode is used. When mode is set to 1, a new chrominance filtering mode is used. In this mode, the chrominance spatial preprocessing filter can be enabled. The value range is [0, 1].
• presfc: strength of the chrominance spatial preprocessing filter. It takes effect only when mode is set to 1, in which case the presfc parameter can be used with sfc to improve the spatial chrominance NR capability. The value range is [0, 32].