he 4x4 luma block containing sample Po, the bitstream shall not contain data that result in an array rSL for which all sample values are equal to 0 for the 4x4 luma block containing sample Po. When cTrafo[ mbAddrQ ] is equal to T_8x8 and the array sTCoeff| mbAddrQ ] contains at least one non-zero scaled transform coefficient value for the 8x8 luma transform block associated with the 8x8 luma block containing sample qo, the bitstream shall not contain data that result in an array rSL for which all sample values are equal to 0 for the 8x8 luma block containing sample qo. - When cTrafo[ mbAddrQ ] is equal to T 4x4 and the array sTCoeff| mbAddrQ contains at least one non-zero scaled transform coefficient value for the 4x4 luma transform block associated with the 4x4 luma block containing sample qo, the bitstream shall not contain data that result in an array rSL for which all sample values are equal to for the 4x4 luma block containing sample qo. G.8.8 Specification of bitstream subsets Clause G.8.8.1 specifies the sub-bitstream extraction process. Clause G.8.8.2 specifies the base layer bitstream. G.8.8.1 Sub-bitstream extraction process It is requirement of bitstream conformance that any sub-bitstream that is the output of the process specified in this clause with pIdTarget equal to any value in the range of 0 to 63, inclusive, tIdTarget equal to any value in the range of 0 to 7, inclusive, dIdTarget equal to any value in the range of 0 to 7, inclusive, and qIdTarget equal to any value in the range of 0 to 15, inclusive, shall be conforming to this Recommendation | International Standard. NOTE - A conforming bitstream contains one or more coded slice NAL units with priority_id equal to 0, dependency_id equal to 0, quality_id equal to 0, and temporal_id equal to 0. Inputs to this process are: a variable pIdTarget (when present), a variable tIdTarget (when present), a variable dIdTarget (when present), a variable qIdTarget (when present). Output of this process is a sub-bitstream. When pIdTarget is not present as inp