一种视频写码设备，其包括处理器，该(等)处理器经组态以针对一当前变换系数之一语法元素之一值的复数个比特子中之每一者，使用先前已写码变换系数之该语法元素之值的各别对应比特子来判定全文。该(等)处理器经组态以使用一先前已写码变换系数之该语法元素之一值的一对应第i比特子来判定该当前变换系数之该语法元素之该值的一第i比特子之一全文。为了使用该先前已写码变换系数之该语法元素之该值的该对应第i比特子，该(等)处理器经组态以仅使用该先前已写码变换系数之该语法元素之该值的该第i比特子而不使用其他比特子。“i”表示一非负整数。

A video coding device includes processor(s) configured to determine, for each of a plurality of bins of a value for a syntax element of a current transform coefficient, contexts using respective corresponding bins of values for the syntax element of previously coded transform coefficients. The processor(s) are configured to determine a context for an ith bin of the value for the syntax element of the current transform coefficient using a corresponding ith bin of a value for the syntax element of a previously coded transform coefficient. To use the corresponding ith bin of the value for the syntax element of the previously coded transform coefficient, the processor(s) are configured to use only the ith bin, and no other bins, of the value for the syntax element of the previously coded transform coefficient. "i" represents a non-negative integer.