General signal processing functions use rounding. The default rounding mode is nearest even, that is the fixed point number x=N + α, 0 ≤ α < 0, where N is an integer number, is rounded as given by:
For example, 1.5 will be rounded to 2 and 2.5 to 2.
Some functions have additional rounding modes, which are set by the parameter roundMode.
Important
- Functions for data compression, data integrity, string processing and fixed-accuracy arithmetic do not perform rounding.
- Functions for speech coding have special rounding modes.