Patent ID: 9270988
Filing Date: 2016-02-23
CPC Classification: H03M,H04N

Claim Text:
1. A method of determining binary codewords for transform coefficients, comprising: providing a transform unit comprising one or more subsets of the transform coefficients, each of the transform coefficients having a quantized value; determining a symbol for each of the transform coefficients that have a quantized value equal to or greater than a threshold value, by subtracting said threshold value from the quantized value of said transform coefficient; providing a parameter variable set to an initial value of zero; converting the symbols into a binary codeword based on a current value of said parameter variable and a value of said symbol; and updating the value of said parameter variable with a new current value for each of the symbols after each symbols has been converted by mathematically incrementing the last value of said parameter variable when the last value of said parameter variable and the value of the last converted symbol together satisfy one or more conditions including a conditional symbol threshold and a conditional parameter threshold and wherein one of said one or more conditions is satisfied when the value of the last converted symbol is greater than or equal to said conditional symbol threshold for that condition and the last value of said parameter variable is less than or equal to said conditional parameter threshold for that condition.