Restrictions on picture width and height

A computer system for coding a video sequence, the computer system comprising:

• one or more computer-readable non-transitory storage media configured to store computer program code;
• and
• one or more computer processors configured to access said computer program code and operate as instructed by said computer program code to implement:
• a chroma_format_idc indicator, a MinCBSizeY parameter, a pic_width_in_luma_samples parameter, a pic_width_in_luma_samples_divide_n parameter, a pic_height_in_luma_samples parameter, and a pic_height_in_luma_samples_divide_n parameter, wherein n is either 4 or 8;
• determining a value of the chroma_format_idc indicator;
• determining, in luma samples, a width and a height of a picture of the video data based on the value of the chroma_format_idc indicator such that:
• when the value of the chroma_format_idc indicator is either 0 or 3:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0, and
• the pic_width_in_luma_samples_divide_n parameter and the pic_height_in_luma_samples_divide_n are integer multiples of the MinCBSizeY parameter, and
• when the value of the chroma_format_idc indicator is 1:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0, and
• the pic_width_in_luma_samples_divide_n parameter and the pic_height_in_luma_samples_divide_n are integer multiples of a variable Max(8, MinCbSizeY) comprising the MinCBSizeY parameter, and
• when the value of the chroma_format_idc indicator is 2:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0,
• the pic_width_in_luma_samples_divide_n parameter is an integer multiple of the variable Max(8, MinCbSizeY), and
• the pic_height_in_luma_samples_divide_n parameter is an integer multiple of the MinCbSizeY parameter.

A non-transitory computer readable medium having stored thereon a computer program for coding a video sequence, the computer program configured to cause one or more computer processors to:

• a chroma_format_idc indicator, a MinCBSizeY parameter, a pic_width_in_luma_samples parameter, a pic_width_in_luma_samples_divide_n parameter, a pic_height_in_luma_samples parameter, and a pic_height_in_luma_samples_divide_n parameter, wherein n is either 4 or 8;
• determining a value of the chroma_format_idc indicator;
• determining, in luma samples, a width and a height of a picture of the video data based on the value of the chroma_format_idc indicator such that:
• when the value of the chroma_format_idc indicator is either 0 or 3:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0, and
• the pic_width_in_luma_samples_divide_n parameter and the pic_height_in_luma_samples_divide_n are integer multiples of the MinCBSizeY parameter, and
• when the value of the chroma_format_idc indicator is 1:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0, and
• the pic_width_in_luma_samples_divide_n parameter and the pic_height_in_luma_samples_divide_n are integer multiples of a variable Max(8, MinCbSizeY) comprising the MinCBSizeY parameter, and
• when the value of the chroma_format_idc indicator is 2:
• the pic_width_in_luma_samples parameter and the pic_height_in_luma_samples parameter are both other than 0,
• the pic_width_in_luma_samples_divide_n parameter is an integer multiple of the variable Max(8, MinCbSizeY), and
• the pic_height_in_luma_samples_divide_n parameter is an integer multiple of the MinCbSizeY parameter.