Quantization Matrices in CUVIDH264PICPARAMS and CUVIDMPEG4PICPARAMS

Dear All,

Please explain me the significance of Quantization Matrices in CUVIDH264PICPARAMS and CUVIDMPEG4PICPARAMS.
What’s the range of values these matrices contain.

I have tried to print these matrices and observed values ranging from 0-255 for CUVIDMPEG4PICPARAMS, and 16 for CUVIDH264PICPARAMS.

Could you please explain me regarding these matrices and will these matrices filled by cuvidDecodePicture?

Any Idea regarding Quantization property in CUVID?

Thanks in advance
Murali