Range of minimum coding block size in video coding

An apparatus of video encoding, comprising:

• processing circuitry configured to:
• encode a first syntax element in a coded video bitstream, the first syntax element specifying a minimum luma coding block size, wherein the encoded first syntax element indicates a binary logarithm value of the minimum luma coding block size minus 2,
• wherein a decoder-verified bitstream conformance requirement specifies the binary logarithm value of the minimum luma coding block size minus 2 is in a range of 0 to (1<<(log 2_ctu_size_minus5+M+2)), where M is an integer and log 2_ctu_size_minus5+5 represents a binary logarithm value of a coding tree unit (CTU) size of the coded video bitstream, and where the binary logarithm value of the minimum luma coding block size minus 2 is greater than (log 2_ctu_size_minus5+3).

A method of processing visual media data, comprising:

• performing a conversion between a visual media file and a bitstream of visual media data according to a format rule,
• wherein the bitstream includes a first syntax element, the first syntax element specifying a minimum luma coding block size, wherein the first syntax element indicates a binary logarithm value of the minimum luma coding block size minus 2,
• wherein the format rule specifies a decoder-verified bitstream conformance requirement that the binary logarithm value of the minimum luma coding block size minus 2 is in a range of 0 to (1<<(log 2_ctu_size_minus5+M+2)), where M is an integer and log 2_ctu_size_minus5+5 represents a binary logarithm value of a coding tree unit (CTU) size of the bitstream, and where the binary logarithm value of the minimum luma coding block size minus 2 is greater than (log 2 ctu_size_minus5+3).