Arithmetic coding data compression/de-compression by selectively employed, diverse arithmetic coding encoders and decoders

Abstract From the Canadian patent

A data compression/de-compression system includes a first arithmetic coding encoder, characterized by a first set of encoding conventions, which encoder generates a code stream that points to an interval along a number line in response to decision event inputs. The code stream can be adjusted to point to the same interval as code streams generated by one or more other arithmetic coding encoders characterized by encoding conventions differing in some way from those in the first set. In a binary context optimal hardware encoders increment or decrement the value of the code stream in response to each occurrence of a more probable decision event while optimal software changes the code stream …