determining, for a conversion between a current block of a video and a bitstream of the video, whether to enable a level mapping operation or a level remapping operation based on whether a significant coefficient flag is equal to zero, wherein the significant coefficient flag indicates whether a residual coefficient of the current block has an absolute level greater than zero, and wherein the level mapping operation or the level remapping operation includes changing between a first representation of the residual coefficient and a second representation of the residual coefficient based on neighboring residual coefficients of the residual coefficient; and

performing the conversion by selectively using the level mapping operation or the level remapping operation based on the determining,

wherein the current block is coded with a transform skip (TS) mode, in which a transform operation on the residual coefficient of the current block is skipped, and

wherein the level mapping operation or the level remapping operation is disabled in response to the significant coefficient flag being equal to zero.