The intelligent truncation of digital signals. Some image processing requires that two signals are multiplied, for example in digital mixing, producing a 16-bit result from two original 8-bit numbers.

This has to be truncated, or rounded, back to 8-bits. Simply dropping the lower bits can result in visible contouring artefacts especially when handling pure computer-generated pictures. Dynamic rounding is a mathematical technique for truncating the word length of pixels, usually to their normal 8-bits. This effectively removes the visible artefacts and is non-cumulative on any number of passes. Other attempts at a solution have involved increasing the number of bits, usually to 10, making the LSBs smaller but only masking the problem for a few generations. Dynamic rounding is a licensable technique, available from Quantel and is used in a growing number of digital products both from Quantel and other manufacturers.