Modifying a scan order to limit scan distance

An apparatus for encoding a transform block of coefficients, comprising:

• a memory;
• a processor, wherein the memory includes instructions executable by the processor to:
• identify an original scan order for encoding the coefficients;
• generate a new scan order from the original scan order such that a maximum scan distance of the new scan order is less than or equal to a predetermined distance;
• and
• encode, in an encoded bitstream, the coefficients based on the new scan order.

An apparatus for decoding a transform block of coefficients, comprising:

• a memory;
• a processor, wherein the memory includes instructions executable by the processor to:
• identify an original scan order for decoding the coefficients;
• generate a new scan order from the original scan order such that a maximum scan distance of the new scan order is less than or equal to a predetermined distance;
• and
• decode, from an encoded bitstream, the coefficients based on the new scan order.