NVIDIA VIDEO CODEC SDK - Lossless

Hi,

Is there someone who know what “lossless H264” mode means in the following matrix : https://developer.nvidia.com/nvidia-video-codec-sdk#NVENCFeatures

I see in the table that YUV 4:2:0 and YUV 4:4:4 are supported for the H264 codec.
However what “H.264 (AVCHD) LOSSLESS” means ? Is it a direct RGB support instead of a YUV/NV12 format ?

Thanks in advance for your help,

See you,
Vince