Patent ID: 8837588
Filing Date: 2014-09-16
Classification: H04N

Abstract:
1. A coding method for coding a picture signal for a first unit, the first unit including one or more second units, the coding method comprising: transforming, for a second unit from among the one or more second units, the picture signal for the first unit into a coefficient and quantizing the coefficient; and judging whether or not a size of the first unit is identical to a size of the second unit; selecting a first probability table or a second probability table so that (i) the first probability table is selected when the size of the first unit is identical to the size of the second unit and (ii) the second probability table is selected when the size of the first unit is not identical to the size of the second unit regardless of the size of the second unit; performing arithmetic coding on a luminance CBF flag indicating whether or not a quantized coefficient is included in the second unit, using the selected one of the first probability table and the second probability table, wherein when the size of the second unit is a first size which is not identical to the size of the first unit, said selecting selects the second probability table, and wherein when the size of the second unit is a second size which is not identical to the size of the first unit and not identical to the first size, said selecting selects the second probability table.