一种熵写码视频数据之实例方法，其包括：获得在一上下文自适应性熵写码过程中使用以熵写码该视频数据之一图块中之一语法元素的一值的复数个上下文中之一上下文的一预定义初始化值，其中借由N比特精度存储该预定义初始化值；使用一查找表且基于该预定义初始化值判定用于该视频数据之该图块的该上下文之一初始概率状态，其中该上下文之可能概率状态之数目大于2的N次幂；及基于该上下文之该初始概率状态熵写码该语法元素之该值的一比特子。

An example method of entropy coding video data includes obtaining a pre-defined initialization value for a context of a plurality of contexts used in a context-adaptive entropy coding process to entropy code a value for a syntax element in a slice of the video data, wherein the pre-defined initialization value is stored with N-bit precision; determining, using a look-up table and based on the pre-defined initialization value, an initial probability state of the context for the slice of the video data, wherein a number of possible probability states for the context is greater than two raised to the power of N; and entropy coding, based on the initial probability state of the context, a bin of the value for the syntax element.